流场中沿轴向运动圆柱的附加质量计算  

Calculation on added mass of cylinder moving along its axis in flow field

作　　者：冯双双 魏晓娟[2] 孙磊[3] 谢凌志[1] 魏泳涛[1] 

机构地区：[1]四川大学建筑与环境学院,成都610065 [2]四川电力职业技术学院动力工程系,成都610072 [3]中国核动力研究设计院反应堆结构力学研究所,成都610041

出　　处：《计算机辅助工程》2015年第2期42-46,52,共6页Computer Aided Engineering

摘　　要：分别计算理想流体和黏性流体中沿轴向运动圆柱的附加质量.基于相对运动原理得出在无限流体域中不同长细比圆柱的附加质量,验证附加质量与流体黏性无关的这一结论,并发现长细比越大,附加质量因数越小.利用动网格技术的数值模拟结果表明:圆管中沿轴向运动圆柱的附加质量随管径比减小而增大,且流体的流动形态会对物体的附加质量产生一定的影响.以长细比和管径比为参数给出无限和有限流体域中圆柱附加质量与相应参变量的拟合函数.The added mass of a cylinder moving along its axis in ideal fluid and viscous fluid is calculated. The added mass of the cylinders with different slenderness ratios in infinite fluid domain is calculated on the basis of the principle of relative motion. It is concluded that,the added mass has nothing to do with fluid viscosity,and the larger slender ratio,the smaller added mass factor. The numerical simulation results obtained by moving mesh technique show that,the added mass of the cylinder moving along its axis in tube increases with the decrease of tube diameter ratio,and the flow pattern of fluid has some effect on the added mass. Taking the slenderness ratio and diameter ratio as the parameters,the fitting function of the cylinder in infinite and finite fluid domain with the corresponding variables is given.

关 键 词：圆柱 附加质量 相对运动 流体黏性 长细比 管径比 动网格 

分 类 号：O35[理学—流体力学]