2014年7月-中船重工702研究所

2014年7月-中船重工702研究所 目 次 学术论文 自驱动Janus微球分数布朗运动的颗粒动力学模拟..........................................胡静, 张鸿雁, 郑旭, 等(377) 空泡在管道中的动力学行为研究….…………...............................................徐明, 胡国良, 邹俊, 等(385) 亲/疏水性球体入水过程数值计算参数影响研究.............................................................余彧, 陈效鹏(393) 新型水驱关系式的推导及应用.................................................................柳誉剑, 王新海, 杜志华, 等(404) 高雷诺数下并列双圆柱绕流的DES法三维数值模拟.……………..................李燕玲, 苏中地, 李雪健(412) 直旋混合射流喷嘴结构参数对流场特性的影响…....….......................................吴德松, 廖华林, 杨斌(421) 单戗条件下抛投强度对截流难度的影响研究.....................................................张静, 杨庆, 戴光清, 等(429) …......................................宋子路, 任冰, 孙见锋, 等(435) 弹性支撑水平板上的波浪冲击压力试验研究........ 不同叶片数的风力机绕流场的非定常流数值模拟……..……….........................................周胡, 万德成(444) 各向异性稠油油藏SAGD产能计算……………......................................王大为, 刘小鸿, 张风义, 等(454) 铝制加筋板楔形体入水砰击模型实验研究………......................................骆寒冰, 刘鑫, 董德龙, 等(460) 自由面格林函数分类计算及船海水动力学中的应用...…...........................朱仁传, 缪国平, 洪亮, 等(469) 对称SPH核近似方法的研究..................................……....................热合买提江•依明, 买买提明•艾尼(479) 圆筒仓内自然对流对粮堆热湿传递的影响研究.................................................王远成, 亓伟, 张中涛(487) 带耗散自由面势流方程的Crank-Nicolson有限差分方法数值模拟……………..罗志强, 黄玉萍, 曾光(497) 学术活动及其他 Journal of Hydrodynamics 2014年第3期目次...............................................................................................(506) “周培源水动力学奖”奖励条例....................................................................................................................(508) 评选2014年度周培源水动力学奖公告.........................................................................................................(509) 李玉成教授获美国土木工程师学会港口工程领导学者称号.......................................................................(510) 期刊基本参数:CN 31-1399/TK*1984*B*A4*129*zh*P*,20.00*1000*15*2014-07 CHINESE JOURNAL OF HYDRODYNAMICS Vol.29 No.4 2014 CONTENTS Particle dynamics simulation on fractional Brownian motion of self-propellant Janus microsphere …………………………………..…….……………..............HU Jing, ZHANG Hong-yan, ZHENG Xu, et al. (377) Dynamic behavior study of the cavitation bubble in the tube ………………………………………………………...........................XU Ming, HU Guo-liang, Zou Jun, et al. (385) The influences of numerical parameters on the water impact simulations of hydrophilic and hydrophobic spheres …………….……………….…….................................................................................YU Yu, CHEN Xiao-Peng (393) Derivation and application of new water flooding relation …………………………………………………......................LIU Yu-jian, WANG Xin-hai, DU Zhi-hua, et al. (404) Three-dimensional numerical simulation of flow around two side-by-side circular cylinders at high Reynolds numbers using DES method ………………………………………………….…............................LI Yan-ling, SU Zhong-di, LI Xue-jian (412) Study on the influence of nozzle structural parameters of straight-swirling integrated jet on flow field characteristics ………………………………………………………..........................WU De-song, LIAO Hua-lin, YANG Bin (421) The study on the impact of the dumping intensity to the closure difficulty under the condition of single peak embankment ……………………………………………...........................ZHANG Jing, YANG Qing, DAI Guang-qing, et al. (429) Experimental study of the wave impact pressure on horizontal deck with elastic braces …………………………………………….……....................SONG Zi-lu, REN Bing, SUN Jian-feng, et al. (435) Numerical simulation of the unsteady flow around wind turbines with different blades numbers ……………………………………………………...............................................ZHOU Hu, WAN De-Cheng (444) Calculation of SAGD productivity in anisotropic heavy oil reservoir ………………………………………………………...WANG Da-wei, LIU Xiao-hong, ZHANG Feng-yi, et al. (454) Experimental investigation of water impact of one free-drop wedge with stiffened aluminum panels …………………………………………………….........….......LUO Han-bing, LIU Xin, DONG De-long, et al. (460) Some comparisons on free-surface Green function calculation and application for ship hydrodynamics ..…………………………………….……………........ZHU Ren-chuan, MIAO Guo-ping, HONG Liang, et al. (469) Study on the symmetric SPH kernel approximation ………………………………………………………..................................Rahmatjan Imin, Mamtimin Gheni (479) The effect of natural convection on heat and moisture transfer of stored grain in a silo …………………………………………..………….…............WANG Yuan-cheng, QI Wei, ZHANG Zhong-tao (487) Numerical simulation of Crank-Nicolson finite difference method for potential flow equations with a dissipative free surface ……………………………………….….................................LUO Zhi-qiang, HUANG Yu-ping, ZENG Guang (497) 自驱动Janus微球分数布朗 * 运动的颗粒动力学模拟 1121胡静, 张鸿雁, 郑旭, 崔海航 (1. 西安建筑科技大学环境与市政工程学院, 陕西 西安 710055, Email: hujingdlu@163.com; 2. 中国科学院力学研究所 非线性力学国家重点实验室, 北京 100190) 摘 要:该文通过分析Janus微球的运动过程，建立了包括随机布朗力、布朗力矩、自驱动力及Stokes阻力在内的颗粒动 力学模型，通过数值模拟手段研究了不同粒径和不同自驱动速度下Janus微球的分数布朗运动，获得了不同的运动模式、均方 位移及Hurst指数。模拟结果表明，Janus微球的均方位移随时间非线性增加，在不同观察时间下Janus微球可呈现出布朗运动、 自驱动及类布朗运动的特征，Hurst指数亦产生相应变化。数值模拟结果与实验结果很好地符合，反映出Janus微球的分数布朗 运动特性，说明所建颗粒力学模型的合理性，为今后Janus微球的操控与具体应用奠定了基础。 关 键 词:Janus微球;数值模拟;自驱动;分数布朗运动 中图分类号:O363.1 文献标识码:A Particle dynamics simulation on fractional Brownian motion of self-propellant Janus microsphere 1121HU Jing, ZHANG Hong-yan, ZHENG Xu, CUI Hai-hang (1. School of Environment and Municipal Engineering, Xi’an University of Architecture and Technology, Shan xi Xi’an 710055, China; 2. Laboratory of Nonlinear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China) Abstract: Based on Janus microsphere’s motion analysis, the particle dynamic model involving random Brownian force and toque, self-propulsion and Stokes drag are constructed. Through numerical solving, the effect of different diameters and different 2,,,Lself-propulsion strength on fractional Brownian motion are studied. Different motion modes and the mean square displacement 2,,,Land Hurst indexes are obtained. The simulation results show that increases with nonlinearly, Janus particle may be ,t characteriged as the Brownian motion, self-propulsion and Brownian-like motion under the different Δt and Hurst indexes also change correspondingly. Numerical simulation and experimental observation are in good agreement, which proves the present model reasonable and also provides the foundation for the followed manipulation of Janus particle and the practice applications. Key words: Janus microsphere; numerical simulation; self-propulsion; fractional Brownian motion * 空泡在管道中的动力学行为研究 1122 徐明, 胡国良, 邹俊, 吉晨 (1. 华东交通大学机电工程学院, 江西 南昌 330013, Email:xuming123@zju.edu.cn; 2. 浙江大学流体动力与机电系统国家重点实验室, 浙江 杭州 310027) 摘 要:该文将实验与数值计算相结合研究了空泡在管道中的动力学行为，使用高速相机记录了空泡在受限制管道空间内 的成长及溃灭过程，采用BEM的数值仿真方法模拟了空泡在管道中的成长及溃灭过程，并将仿真结果与实验结果进行了对比。 分析了空泡的演化过程及对应的压力分布情况，最后讨论了管道对空泡周期和体积的影响。 关 键 词:空泡;管道;BEM方法;受限制空间 中图分类号:TH137.5 文献标识码:A Dynamic behavior study of the cavitation bubble in the tube 1122XU Ming, HU Guo-liang, Zou Jun, JI Chen (1. School of Mechatronics Engineering, East China Jiaotong University, Nanchang 330013, China; 2. The State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China) Abstract: Dynamic behavior of the cavitation bubble in the tube was studied with experimental and numerical method combined. The high-speed camera recorded the growth and collapse of the oscillating bubble in the confined tube space. The BEM method was employed to simulate the bubble growth and collapse process and the results were compared with the experimental results. The evolution process of the bubble and the pressure distribution were analyzed. Finally, the effect of the tube on the bubble period and volume was discussed. cavitation bubble; tube; BEM method; confined space Key words: * 亲/疏水性球体入水过程数值计算参数影响研究 余彧, 陈效鹏 (西北工业大学 力学与土木建筑学院, 陕西 西安, 710072, Email: xchen76@nwpu.edu.cn) 摘 要:针对相同工况下亲/疏水球体入水产生截然不同的现象，该文从数值模拟角度对球体低速入水问题进行了研究。通 过对比分析两种状态下数值模拟结果的差异性，探讨了不同表面特性结构体入水过程中空泡生成条件的物理机理，重点研究液 体沾湿球体表面的过程。研究结果证明固体微观表面特性对结构体入水现象有重要影响。通过引入隐性数值滑移概念，分析了 气液界面捕捉 格式 pdf格式笔记格式下载页码格式下载公文格式下载简报格式下载 、球体壁面边界层网格等计算参数的影响，在此基础上 总结 初级经济法重点总结下载党员个人总结TXt高中句型全总结.doc高中句型全总结.doc理论力学知识点总结pdf 了适用于此类问题的数值处理方法。同时结合动 态沾湿理论分析了数值滑移在入水数值仿真中的物理基础。模拟结果在空泡形成和冲击载荷方面均与实验有着很好的一致性。 关键词:入水;动态沾湿;数值仿真 中图分类号:TE345 文献标识码:A The influences of numerical parameters on the water impact simulations of hydrophilic and hydrophobic spheres YU Yu, CHEN Xiao-Peng (School of Mechanics, Civil Engineering and Architecture, Northwestern Polytechnical University, Shanxi Xi’an 710072) Abstract: Water entry, which is substantially influenced by the wetting properties of the surface of the structure, is simulated based on volume of fluid (VOF) coupled finite volume method for spheres. In order to understand the physical mechanism of cavity forming criterion, the wetting process is focused on by comparing the difference in water impact of hydrophilic and hydrophobic sphere. And how the microscopic surface properties affect macroscopic hydrodynamic phenomenon is explored in the process. Meanwhile, the influence of numerical parameters, such as the interface reconstruction schemes and the boundary layer grid in the vicinity of sphere, are analyzed by introducing the theory of implicit numerical slip. An empirical treatment is proposed for water entry simulation. Physical basis of the inherent slip in numerical simulation is analyzed associated with dynamic wetting theory. Direct comparisons with experimental data show that the simulation accurately captures the physical effects including the forming of cavity and the evolution of the impact loads. Key word: water entry; dynamic wetting; numerical simulation * 新型水驱关系式的推导及应用 1,213444柳誉剑, 王新海, 杜志华, 廖春, 史玉成, 张煜 (1. 中国石油大学石油工程教育部重点实验室, 北京 102249, Email: 346882853@qq.com; 2. 安东石油技术(集团)有限公司, 北京 100102; 3. 中国石油工程设计青海分公司, 甘肃 敦煌 736202; 4. 中国石油青海油田勘探开发研究院, 甘肃 敦煌 736202) 摘 要:该文以Buckley-Leverett的线性驱替理论以及Welge平均含水饱和度方程为基础，推导出一种新型水驱特征曲线 关系式，并进行曲线单调性等特征分析，阐述了如何合理选取线性回归起始点以提高预测可采储量以及最终采收率等未来开发 指标的精度。新型水驱特征曲线还可以用于油田地质储量的预测。实例证明，该文所推导的新型水驱特征曲线能有效地预测未 来开发动态，对于油田生产开发指标预测有一定的实用性。 关 键 词:水驱特征曲线;含水饱和度;含水率;可采储量;地质储量 中图分类号:TE341 文献标识码:A Derivation and application of new water flooding relation 1,213LIU Yu-jian, WANG Xin-hai, DU Zhi-hua, 444LIAO Chun, SHI Yu-cheng, ZHANG Yu (1. China University of Petroleum, Ministry of Education Key Laboratory of Petroleum Engineering, Beijing 102249, China; 2. Anton Oilfield Services (Group) Ltd., Beijing 100102, China; 3. China Petroleum Engineering Company Limited, Qinghai Branch, Dunhuang 736202, China; 4. Exploration and Development Research Institute of Qinghai Oilfield Company Limited, Dunhuang 736202, China) Abstract: This paper is based on Buckley-Leverett theory of linear displacement and Welge average water saturation equation. A new water flooding characteristic curve is derived and the characteristic of monotonicity is analyzed. Explaining how to select the reasonable starting point for linear regression to improve the accuracy of the predictive recoverable reserves and ultimate recovery. The new water flooding characteristic curve can be used to forecast the geological reserves for oilfields. The examples prove that the new type of water flooding characteristic curve can predict the dynamic of future development for the oilfields effectively and has a certain practicality for the forecast of indexes for oil production and development. Key words: water flooding characteristic curve; water saturation;water cut; recoverable reserves; geological reserves 高雷诺数下并列双圆柱绕流的 * DES法三维数值模拟 李燕玲, 苏中地, 李雪健 (中国计量学院 计量测试工程学院, 杭州 310018, Email: liyanling5670@126.com) 4摘 要:该文采用基于S-A的DES方法对雷诺数为10且不同间距比下并列双圆柱的湍流模型进行了三维数值模拟，取间 距比为1.1、1.5、2.0、3.0和4.0(为两圆柱中心之间的距离，为圆柱直径)。数值模拟研究了流场形态，升阻力系数TD/TD 及升力频谱，发现了不同间距比下的各种紊流形态及流体动力情况，它们与实验结果一致且显示了明显的三维特性，同时这也 验证了DES方法在高雷诺数柱群数值模拟方面的准确性。 关 键 词:并列双圆柱;三维;高雷诺数;DES方法 中图分类号:TV131.2 文献标识码:A Three-dimensional numerical simulation of flow around two side-by-side circular cylinders at high Reynolds numbers using DES method LI Yan-ling, SU Zhong-di, LI Xue-jian (China Jiliang University, College of Metrology and Measurement, Hangzhou 310018, China) Abstract: In this paper, Three-dimensional flow over two side-by-side circular cylinders is numerically simulated using DES method based on Spalart-Allmaras turbulence model for varied spacing ratios at 10000. The computational simulations were Re, performed for five different spacing ratios 1.1, 1.5, 2.0, 3.0 and 4.0 ( is the transverse distance between the centers of two TD/,T circular cylinders, is the diameter of the circular cylinders). The numerical simulation focuses on investigating the flow patterns, the D time histories of lift and drag coefficients, and the spectrum of lift coefficients. The results show various turbulent wake patterns and hydrodynamic forces for varied spacing ratios. They have a good agreement with experimental results and show vivid 3D characters. Moreover, all these verify the calculation accuracy of DES method for cylinder groups at high Reynolds numbers. Key words: two side-by-side circular cylinders; Three-dimensional; high Reynolds number; DES method * 直旋混合射流喷嘴结构参数对流场特性的影响 112吴德松, 廖华林, 杨斌 (1. 中国石油大学(华东)石油工程学院, 山东 青岛 266580, Email: liaohualin2003@126.com; 2. 中石油大庆油田力神泵业有限公司, 黑龙江 大庆 163311) 摘 要:直旋混合射流兼具直射流和旋转射流的优点，为了进一步探究喷嘴结构参数对流场及破岩特性的影响，该文采用 数值模拟方法，分析了叶轮中心孔直径、叶轮旋槽出口角度和面积、混合腔和收敛角等喷嘴结构参数对射流流动结构的影响规 律。结果表明，射流轴心速度衰减主要受叶轮中心孔直径和旋槽出口角度的影响;截面切向速度分布规律主要受叶轮中心孔直 径、叶轮旋槽出口角和截面积、混合腔收敛角及喷距的影响。对比不同结构参数下的破岩实验发现，轴心速度衰减梯度小，有 利于提高喷嘴的有效作用距离，轴向速度大，有利于提高钻孔深度，切向速度峰值和作用面积大，有利于提高钻孔孔径。研究 结果可为径向水平井射流钻头结构参数设计提供依据。 关 键 词:直旋混合射流;流动结构;喷嘴设计;参数优化 中图分类号:TD231.62 文献标识码:A Study on the influence of nozzle structural parameters of straight-swirling integrated jet on flow field characteristics 112WU De-song, LIAO Hua-lin, YANG Bin (1. College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, Shandong, China; 2. Daqing Oilfield Lishen Pump Industry Co., LTD, PetroChina, Daqing, 163311, Heilongjiang, China) Abstract: The straight-swirling integrated jet has advantages of both the straight jet and the swirling jet. To further investigate the influence of structural parameters and rock breaking characteristics of the straight-swirling integrated jet on its flow field, the numerical simulation method is used to make a research on several structural parameters: the diameter of the impeller center hole, the angle and the area of the impeller slot, the length and the convergence angle of mixing chamber, and so on. The results reveal that the axial velocity attenuation rule is influenced by the diameter of the impeller center hole and the angle of the impeller slot; the distribution of the tangential velocity is influenced by the diameter of the impeller center hole, the angle and the area of the impeller slot, the convergence angle of the mixing chamber, and the spray distance. Compared with the results of rock breaking tests, those are found that the lower axial velocity attenuation gradient is, the longer effective spray distance it has. The higher axial velocity it has, the longer drilling depth it achieves. The higher tangential velocity and larger effective area it has, the larger hole diameter it achieves. The study would provide a reference for jet bit structure design in radial horizontal drilling. Key words: straight-swirling integrated jet; flow structure; nozzle design; parameter optimization * 单戗条件下抛投强度对截流难度的影响研究 1,21,21,23 张静, 杨庆, 戴光清, 许杰 (1. 四川大学水力学与山区河流开发保护国家重点实验室, 四川 成都 610065, Email:weizhangjing0308@126.com; 2. 四川大学水利水电学院, 四川 成都 610065; 3. 中国市政工程西南设计总院, 四川 成都 610081) 摘 要:河道截流是水电工程建设过程中的控制性节点工程，实际截流工程中发现，增加抛投强度可以显著减少抛投料的 流失，从而实现安全截流。从单位时间龙口水流的冲刷能力与抛投料的抗冲能力之间的平衡观点出发，该文提出了水流极限冲 刷值的概念。对不同粒径条件下的水流极限冲刷值进行实验，由实验结果得出其经验公式，在此基础上提出:实际截流中的抛 投强度大于合龙过程中的最大水流极限冲刷值便可顺利合龙。同时截流抛投强度与抛投料流失量之间的实验结果表明:在相同 块石粒径的情况下，随着抛投强度的增加，块石流失量逐渐减小;当抛投强度达到一定强度后，流失量减小的速度逐渐放缓; 在相同抛投强度下截流，抛投材料的粒径越大流失量越小。 关 键 词:截流;抛投强度;极限冲刷值;流失量 中图分类号:TV855 文献标识码:A The study on the impact of the dumping intensity to the closure difficulty under the condition of single peak embankment 1,21,21,23 ZHANG Jing, YANG Qing, DAI Guang-qing, XU Jie (1. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Cheng Du 610065, China; 2. College of Water Resource & Hydropower, Sichuan University, Cheng Du 610065, China; 3. Southwest Municipal Engineering Design & Research Institute of China, ChengDu 610081, China) Abstract: The river closure plays a control node role in the hydropower engineering project. In the actual process of the interception project, increasing the dumping intensity can significantly reduce the loss of the dumped material, so as to achieve the safety closure. From the point of view of the balance between the water washing ability of the closure gap and the anti-scouring ability of the dumped material in unit time, the paper introduces the concept of water flow limit erosion value. Based on the model test which gets the water flow limit erosion value in different block sizes, the paper reaches an empirical formula for calculating the flow limit erosion value and puts forward that it can be closured when the dumping intensity is larger than the largest water flow limit erosion value. And the test between the dumping intensity and the leaching out shows that in the same block size case, with the dumping intensity increasing, the loss of dumped material is gradually reduced; while when the dumping intensity reaches a certain strength, the trend of the reduced loss of the dumped material is gradually slowed down; in the same dumping intensity closure, the bigger of the dumped material particle size the less of the loss. Key words: closure; dumping intensity; flow limit erosion value; leaching out *弹性支撑水平板上的波浪冲击压力试验研究 宋子路, 任冰, 孙见锋, 刘明, 王国玉 (大连理工大学海岸和近海工程国家重点实验室, 大连 116024, Email: bren@dlut.edu.cn) 摘 要:该文通过物理模型试验对不同弹性支撑的透空式水平板结构的波浪冲击作用进行了研究。试验在大连理工大学海 岸和近海工程国家重点实验室的波浪水槽中进行。通过试验比较分析了三种不同支撑刚度的水平板底面的波浪冲击压力历时曲 线变化特性，给出了冲击压力沿结构物底面的分布规律，讨论了结构物底面最大冲击压力和冲击力与结构物支撑刚度的关系， 分析了波浪冲击压力及冲击力随结构物相对净空的变化规律。 关 键 词:弹性支撑，刚度，波浪冲击，压力 中图分类号:U661.7 文献标识码:A Experimental study of the wave impact pressure on horizontal deck with elastic braces SONG Zi-lu, REN Bing, SUN Jian-feng, LIU Ming, WANG Guo-yu (State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China) Abstract: Experiments are carried out to study the wave impact on an open-piled horizontal deck with different elastic braces. They are performed in the wave flume of State Key Laboratory of Coastal and Offshore Engineering. The properties of the time series of wave impact pressures on three different models with elastic braces are investigated. Distributions of wave impact pressures along the underside of those models are given. And the relationships between the stiffness of different braces and maximum impact pressure as well as force are discussed. The changes of the wave impact pressure and force versus relative clearance are analyzed. Key words: elastic brace, stiffness, wave impact, pressure * 不同叶片数的风力机绕流场的非定常流数值模拟 1, 21周胡, 万德成 (1. 上海交通大学 海洋工程国家重点实验室 船舶海洋与建筑工程学院, 上海 200240, Email: zhouhu@sjtu.edu.cn) (2. 中国电建集团华东勘测设计研究院有限公司，杭州 310014) 摘 要:该文基于OpenFOAM自由软件包，采用任意网格界面元方法(Arbitrary Mesh Interface Method)对两叶片和三叶 片风力机风轮周围流场进行了非定常数值模拟和分析。计算采用非结构化网格和 SST湍流模型，分析了多种工况下两叶k-, 片和三叶片风力机风轮的气动性能的特点和差异，并计算风力机的轴向推力、扭转力矩、叶片表面压力分布和尾涡等气动力性 能参数。该文计算得到的结果可为风力机叶片进行结构有限元分析时，提供重要的风载荷数据，为风力机叶片的设计、改型和 研发工作提供详细技术参数。 关 键 词:风力机;OpenFOAM;气动力性能;非定常计算 中图分类号:O357 文献标识码:A Numerical simulation of the unsteady flow around wind turbines with different blades numbers 1,21ZHOU Hu, WAN De-Cheng (1 State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean & Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China) (2 Huadong Engineering Corporation, Hangzhou, 310014, China) Abstract: The numerical simulation of the unsteady flow around wind turbines with different blades numbers are conducted with the Arbitrary Mesh Interface Method based on the free source OpenFOAM software. The turbulence model SST and k-, unstructured grid are chosen to analyze the difference between aerodynamics of two blades and three blades wind turbine under different wind conditions. Detailed numerical results of vortex structure, thrust, torque and pressure distribution of different wind turbine were presented. These results are important to the finite element analysis and the design and research of wind turbines with different blades numbers. Key words: wind turbine; OpenFOAM, aerodynamics, unsteady computation * 各向异性稠油油藏SAGD产能计算 王大为, 刘小鸿, 张风义, 许万坤 (中海石油(中国)有限公司天津分公司渤海石油研究院, 天津 300452, Email: wdwswpu@126.com) 摘 要:蒸汽辅助重力泄油(SAGD)是开采特超稠油油藏的一项前沿技术，经典的SAGD Butler产能模型假设油藏各向 同性，导致产能计算结果较实际值偏高，无法应用于各向异性稠油油藏。该文通过分析各向异性油藏渗透率的方向性，得出了 压力梯度和渗流速度2个方向的渗透率，将2个方向渗透率模型分别代入Butler产能公式，得出了2种适用于各向异性稠油油 藏的SAGD产能半解析公式，并通过数值方法进行了求解。结果表明:方向渗透率的压力梯度和渗流速度模型能够方便地应用 于各向异性油藏产能公式;油藏各向异性会降低SAGD水平扩展阶段产能，并且该阶段产能随着蒸汽腔向泄油边界的扩展逐渐 增大，随着生产时间的推移逐渐接近各向同性情形。 关 键 词:稠油;蒸汽辅助重力泄油;各向异性;产能;渗透率 中图分类号:TE345 文献标识码:A Calculation of SAGD productivity in anisotropic heavy oil reservoir WANG Da-wei, LIU Xiao-hong, ZHANG Feng-yi, XU Wan-kun (Bohai Petroleum Institute, Tianjin Branch of CNOOC, Tianjin 300452) Abstract: Steam assisted gravity drainage (SAGD) is an advanced technology of super heavy oil reservoirs, the classic SAGD Butler reservoir productivity model is assumed isotropic, causing productivity calculation results higher than the actual value, can not be applied to anisotropic reservoir. Through the analysis of permeability direction of anisotropy reservoir, deriving pressure gradient and seepage velocity of two directional permeability, the two directional permeability models are substituted into Butler productivity formula, to obtain two kinds of SAGD productivity semi-analytical formula which applicable to anisotropic heavy oil reservoir, and solved by numerical method. The results show that the pressure gradient and seepage velocity model of directional permeability can be conveniently applied to the anisotropic reservoir productivity formula; reservoir anisotropy will decrease the productivity of SAGD steam chamber horizontal growth stage, and production capacity will increase gradually with the steam chamber expanding to oil drainage boundary, with production time gradually close to the isotropic case. Key words: heavy oil; SAGD; anisotropy; productivity; permeability * 铝制加筋板楔形体入水砰击模型实验研究 1,2222221,2骆寒冰, 刘鑫, 董德龙, 赵中榜, 季红叶, 高原, 林维学 (1. 天津大学水利工程仿真与安全国家重点实验室, 天津 300072, Email: luohanbing@tju.edu.cn; 2. 天津大学船舶与海洋工程系, 天津 300072) 摘 要:砰击载荷是中高速舰船艏部局部结构设计时被重点关注的问题。该文采用落体入水模型实验方法，研究砰击过程 o的砰击压力与结构动响应规律。设计了一个铝制三维楔形体模型，底部斜升角为20，底部两侧是包含三根纵骨和两根横梁的 加筋板结构，两侧的外板厚度、纵骨和横梁的尺寸及厚度不同，可以对比分析结构刚度对结构砰击动响应的影响。设计了一套 模型实验机构，可以实现模型自由释放、垂直落体入水砰击过程。针对不同落体高度，开展了系列入水砰击实验。本文还对入 水加速度和砰击压力的实验结果与理论分析结果进行了对比，吻合较好。最后讨论了砰击的水弹性效应。 关 键 词:入水;铝制加筋板;砰击压力;应力响应;模型实验;水弹性 中图分类号:U661 文献标识码:A Experimental investigation of water impact of one free-drop wedge with stiffened aluminum panels 1,2222LUO Han-bing, LIU Xin, DONG De-long, ZHAO Zhong-bang, 221,2JI Hong-ye, GAO Yuan, LIN Wei-xue (1. State Key Laboratory of Hydraulic Engineering Simulation and Safety, Tianjin University, Tianjin 300072, China; 2. Department of Naval Architecture and Ocean Engineering, Tianjin University, Tianjin 300072, China) Abstract: Slamming load is the important concern of ship designers from the view point of strength for the safety of bow structures. Model test technique using water entry of free-drop bodies into calm water is applied in this paper to study both the slamming pressures oand structural stress responses. First, one 3D aluminum wedge with dead-rise angle 20 is designed. The stiffened panel on each side of the wedge is made up of 3 longitudinal stiffeners and 2 transverse frame with different sizes of cross sections. The effect of structural stiffness on the slamming responses can be studied in one test. Secondly, one test facility is designed for the free-falling experiment. Then, serial tests are carried out with different drop heights. The acceleration, slamming pressures and stress responses are measured. Measured results of pressures are compared with analytical ones. Fair well agreements are achieved. Hydroelastic effect of slamming is discussed. Key words: water entry, stiffened aluminum panels, slamming pressure, stress response, model test, hydroelasticity 自由面格林函数分类计算及 * 船海水动力学中的应用 朱仁传, 缪国平, 洪亮, 唐恺, 高阳 (上海交通大学船舶海洋与建筑工程学院, 海洋工程国家重点实验室, 上海 200240, Email: renchuan@sjtu.edu.cn) 摘 要:自由面格林函数是船舶与海洋工程水动力学中最重要的术语之一，是船舶与海洋工程结构物性能数值计算的关键 基础。该文就航行船体(或浮体)的移动及振荡辐射兴波等各类格林函数的表达进行了分类总结和分析，对新推导的考虑自由面 的均匀分层流中格林函数和考虑黏性耗散的格林函数进行了剖析;给出了频域时域格林函数的数值计算方法和难点并与相关计 算结果进行了比较;对船海工程中频域时域格林函数应用计算和水动力结果的误差进行了比较分析，给出了混合格林函数法解 决自由面格林函数应用困难的实例，试图提出格林函数计算与应用等在不同情况下的最佳处理方案。 关 键 词:格林函数;自由面;频域;时域;水动力 中图分类号:U661.22 文献标识码:A Some comparisons on free-surface Green function calculation and application for ship hydrodynamics ZHU Ren-chuan, MIAO Guo-ping, HONG Liang, TANG Kai, GAO Yang (State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China) Abstract: The Free-Surface Green Function (FSGF) is one of the most important terms in marine hydrodynamics. It is the key basis to numerically solve and analyze hydrodynamic performance for ship or floating structure. The calculations and applications of FSGF of vessel moving with/without forward speed both in time domain and frequency domain are systematically outlined, as well as the newly derived oscillating source Green function in the uniformly stratified fluid. The comparison of both hydrodynamics and vessel motions are carried out by using FSGF. Some annotations on the calculation difficulties of FSGF are illustrated and hydrodynamic results compared to the experimental ones are carried out. A is developed by the hybrid method of transient Green function and simple Green function to eliminate the divergence due to ship flare. The numerical results of ship motions of ship S175 at forward speed are presented and discussed. They are also compared with those of other methods or available experimental data, and they show good agreement. Key words: Green’s function; free surface, frequency domain, time domain, hydrodynamics * 对称SPH核近似方法的研究 1,2热合买提江•依明, 买买提明•艾尼 (1. 新疆大学机械工程学院, 乌鲁木齐 830047, Email: rahmatjanim@gmail.com; 2. 新疆大学数学与系统科学学院, 乌鲁木齐 830046) 摘 要:该文首先在各种光滑粒子流体动力学(SPH)核近似方法研究的基础上，介绍了对称光滑粒子流体动力学(SSPH) 核近似方法。通过各种SPH核近似方法的研究和分析，给出SSPH核近似方法的理论推导过程及其精度分析。然后通过一维函数 算例对各种SPH核近似方法的误差进行分析，最后对热传导和非线性动力学问题进行了验证计算。结果表明，该文介绍的核近 似方法误差最小，计算精度、稳定性和计算量等比其他方法有一定的优越性。 关 键 词:光滑粒子流体动力学;对称SPH核近似方法;精度分析;计算量 中图分类号:O241 文献标识码:A Study on the symmetric SPH kernel approximation 1,21Rahmatjan Imin, Mamtimin Gheni (1. School of Mechanical Engineering, Xinjiang University, Urumqi 830047 China; . Schools of Mathematics and System Science, Xinjiang University, Urumqi 830046 China) 2 Abstract: This paper first introduces the symmetric SPH (SSPH) kernel approximation based on kernel approximation of the various kinds of smooth particle hydrodynamics (SPH) method. Through study and analysis of various kinds of SPH kernel approximation methods, theoretical derivation of SSPH kernel approximation method is presented and its accuracy is analyzed. Secondly, the errors comparison of the various kinds of SPH kernel approximation is analyzed by a one-dimensional function example. Last, SSPH method is verified by the calculation of heat transfer and nonlinear dynamic problems. The results show that the error of SSPH method is relatively small; the calculation accuracy, the stability and computation amount one superior to other SPH method. Key words: smoothed particle hydrodynamics (SPH); SSPH kernel approximation; accuracy analysis; computation amount * 圆筒仓内自然对流对粮堆热湿传递的影响研究 王远成, 亓伟, 张中涛 (山东建筑大学教育部可再生能源建筑利用技术实验室, 山东 济南 250101, Email: wycjn1@163.com) 摘 要:该文基于谷物等温吸附原理和局部热湿平衡假设，建立和验证了吸湿性多孔介质内部自然对流和热湿耦合传递的 数学模型，并采用数值模拟的方法考察了由于圆筒仓外季节性的大气温度变化而导致的仓储粮堆内部自然对流流动对粮堆内部 热量传递和水分迁移的影响。通过数值模拟预测和分析了冬季和夏季两种情况下，高度为16 m、直径为10 m的圆筒仓内部自 然对流流场、温度和水分分布规律。 关 键 词:谷物储藏;自然对流;热量传递;水分迁移;数值模拟 中图分类号:TK124 文献标识码:A The effect of natural convection on heat and moisture transfer of stored grain in a silo WANG Yuan-cheng, QI Wei, ZHANG Zhong-tao (Key Laboratory of Renewable Energy Utilization Technologies in Buildings of the National Education Ministry, Shandong Jianzhu University, Jinan 250101, China) Abstract: Temperature gradients developed due to the seasonal variations in ambient temperatures cause natural convection airflow, heat transfer and migration of moisture within the bulk grain. In present paper, a mathematical model of natural convection heat and moisture transfer is developed by reflecting the change in air moisture on the grain moisture through the sorption isotherm. Natural convection flows are computed by solving a Brinkman-Darcy equation. The effect of temperature gradients on natural convection, heat transfer and moisture migration is simulated numerically by using Multiphisycs COMSOL 4.3. The validity of the numerical model is ascertained by comparing the predicted results with experimental and numerical results in the literatures. The model is applied to predict the airflow patterns, temperature and grain moisture distributions under conditions approximating winter and summer storage periods in silo with 10 m in diameter a height of 16 m. The predictions of moisture and temperature distribution are consistent with field observations. Key words: grain storage, natural convection, heat transfer, moisture migration, numerical simulation 带耗散自由面势流方程的Crank-Nicolson * 有限差分方法数值模拟 罗志强, 黄玉萍, 曾光 (昆明理工大学理学院系统科学与应用数学系, 云南 昆明 650083, Email: zql1009@126.com) 摘 要:该文建立了带耗散自由面势流方程组Crank-Nicolson有限差分方法。通过坐标变换将不规则的水槽区域变换为一个 规则的正方形区域，在计算区域构造交错网格，对非线性势流方程组建立Crank-Nicolson隐格式的有限差分方法，设计了流场变 量的耦合迭代的算法。数值求解了在无耗散情况下的自由面数值解与解析解的误差，数值解吻合Frandsen的解析解。数值模拟 了在不同耗散系数下的自由运动，水平激励和垂直激励下的自由面波高和速度场。数值实验表明自由振动和垂直激励振动随着 耗散系数的增加波高和流场速度都减小。在水平激励下的自由面波高和速度场随耗散系数的增加而减小，当波高和速度衰减到 一定程度后，自由面保持稳定的波高和速度场，自由面波高出现了耗散现象。 关 键 词:Crank-Nicolson隐格式;有限差分方法;非线性耗散势流方程;数值模拟 中图分类号:O351.2 文献标识码:A Numerical simulation of Crank-Nicolson finite difference method for potential flow equations with a dissipative free surface LUO Zhi-qiang, HUANG Yu-ping, ZENG Guang (Department of System Science and Applied Mathematics. School of Science, Kunming University of Science and Technology, Kunming 650083, P. R. China) Abstract: A implicit scheme finite difference method of the Crank-Nicolson type for the 2D nonlinear potential flow equations is proposed with a dissipative free surface. The irregular tank is mapped onto a fixed square domain divided by rectangular cells through a proper mapping function. A staggered mesh system is adopted and a coupling iterative algorithm is presented in a 2D tank. The results show that the numerical solutions agree with the Frandsen’s analytical solutions of the potential flow equations without dissipative free surface. The paper presents numerical results of the wave elevations and velocity field with free motion, horizontal excited motion and vertical excited motion. Experimental results show that the wave elevation and velocity field will be decreased as the dissipative parameters increase for the free oscillation and vertical excited oscillation. The wave elevation and the velocity field for the horizontal excited oscillation will be reduced as the dissipative parameters increase. The wave elevation and velocity field will be kept stability when the excited force equals the dissipative force, and the wave elevation of the free surface behaves dissipative phenomenon. Key words: Crank-Nicolson implicit scheme; finite difference method; nonlinear dissipative potential flow equation; numerical simulation