摘要
基于气液两相当地均相介质模型,本文给出了一种模拟非定常粘性空化流动的计算模型。认为空化绕流流场中流动介质是一种当地均匀的气液混相物。控制方程采用了应用两相流模型的N-S方程。基于液相和气相的状态方程推导了混合介质密度的表达式。为了保证数值计算的稳定性,控制方程的数值求解采用了TVD-MacCormack格式。为了评价计算模型的可靠性,分别计算了绕台阶和管道水锤的空化流动,所得结果是合理的,说明该方法可以用于空化流动的数值计算。
A computational model for the treatment of unsteady, viscous cavitating flows is described in this paper. Navier-Stokes equations using a two-phase model are employed to account for cavitated regions. The model is based on a locally homogeneous model of the gas-liquid two-phase medium. The density of the media varies in magnitude between the gas and liquid density. The governing equations are solved by TVD-MacCormack predictor-corrector two explicit method in order to enhance the numerical stability. To assess the computation model, cavitating flow over a step is computed, and reasonable results are obtained. And then, cavitating phenomena in a bend tube are analyzed.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第5期783-785,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.50276004)
教育部留学回国人员科研启动基金资助项目
关键词
空化
流动模型
数值计算
cavitation
flow model
numerical simulation
