当地均相介质模型在通气超空化流动计算中的应用  

The Application of a Local Homogenous Medium Model in the Ventilated-supercavitation Flow Computations

作　　者：时素果[1] 王国玉[1] 权晓波 余志毅[1] 

机构地区：[1]北京理工大学机械与车辆工程学院,北京100081 [2]北京宇航系统工程研究所,北京100076

出　　处：《兵工学报》2011年第2期147-154,共8页Acta Armamentarii

基　　金：国家自然科学基金项目资助(50976004);高校博士点基金(20080070027)

摘　　要：为了更加精确地模拟通气超空化流动,本文推导建立了一种基于状态方程的当地均相介质模型,并应用二次开发技术将其嵌入商业软件。分别采用商业软件中的两相流模型以及当地均相介质模型+两相流模型计算了绕圆盘空化器的通气超空化流动,并从空泡形态、流动结构和阻力特性等方面与实验结果进行了对比。结果表明,由于考虑了混相流动的可压缩性,当地均相介质模型能更准确的模拟通气空化的非定常流场,计算获得的空泡形态、阻力系数等与实验结果更加接近。In order to simulate the ventilated-supercavitation flow more accurately,a local homogeneous medium model based on the state equation is proposed and embedded in commercial software.The two-phase flow model in the commercial software and the software＋local homogenous medium model are used to simulate the ventilated-supercavitation flows around a disk-cavitator respectively.The simulated results are compared with the experimental data on bubble shape,flow structure,drag characteristic and so on.Since the local homogenous medium model considers the compressibility of the gas-liquid,it can simulate the ventilated-cavitation more acculately,and the bubble shape and the drag force coefficient computed from the model are more accordant with the experimental results.

关 键 词：流体力学 当地均相介质模型 通气超空化 圆盘空化器 可压缩性 

分 类 号：TV131.32[水利工程—水力学及河流动力学]