弹性体和带空泡体的附加质量动态数值计算  

Hydrodynamic Numerical Computation of the Added Mass of Elastic Body & Cavitation Bubble

作　　者：弓三伟[1] 陆宏志[2] 邹正平[1] 卢凤翎[2] 

机构地区：[1]北京航空航天大学能源与动力工程学院,北京100191 [2]中国运载火箭技术研究院研究发展中心,北京100076

出　　处：《计算机仿真》2010年第4期349-354,共6页Computer Simulation

摘　　要：附加质量是水下航行器水动力特性中的重要参数,对于弹性体和带空泡状态下的附加质量计算还有一定的困难。采用基于动网格技术的三维非定常粘性CFD程序解决了物体在流场中刚体运动和弹性变形所引起的附加质量计算问题。通过经典的刚体、弹性体附加质量算例验证了此方法是准确可靠的,还结合多相流模型和Rayleigh Plesset空化模型对带空泡体的附加质量进行了数值计算。带空泡体附加质量的数值研究表明,尾流中的空泡是否附体对轴向(流向)的附加质量影响比较大,对于本算例而言前端的肩空泡尺寸与横向(法向)附加质量系数则存在紧密的物理关联。Added mass is one of the most important factors of hydrodynamic character, and asking for further study of the effect of flutter and cavity on the added mass. The 3 - D unsteady viscous CFD code based on dynamic mesh technique is adopted to solve the problem of added mass computation when objects move rigidly or deform elas- tically in fluid. The precision and reliability of the method is verified through computation of the typical cases of rigid and elastic added mass, and the cavity flow added mass is studied numerically with the method combining with a mu｜- tiphase model and Rayleigh Plesset cavitation model. The study on cavity flow added mass indicates that, the attac- hing of the cavitation bubble in the wake flow has a relatively large impact on the axial （streamwise） added mass, and for this example a close physical association exists between the front cavitation bubble length and the transverse added mass.

关 键 词：附加质量 空泡 弹性体 动网格 水下航行器 

分 类 号：TV131.2[水利工程—水力学及河流动力学]