| 非定常粘性空化流动模型及其数值计算 |
| |
| 引用本文： | 王国玉,方韬,曹树良,韩占忠.非定常粘性空化流动模型及其数值计算[J].工程热物理学报,2004,25(5):783-785. |
| |
| 作者姓名： | 王国玉 方韬 曹树良 韩占忠 |
| |
| 作者单位： | 北京理工大学机械与车辆工程学院,北京,100081;清华大学热能系,北京,100084;日本国东北大学流体科学研究所,日本,仙台,980 |
| |
| 基金项目： | 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 |
| |
| 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。
|
| 关 键 词： | 空化 流动模型 数值计算 |
| 文章编号： | 0253-231X(2004)05-0783-03 |
| 修稿时间： | 2003年11月27 |
NUMERICAL MODELING OF UNSTEADY VISCOUS CAVITATION FLOWS |
| |
| WANG Guo-Yu FANG Tao CAO Shu-Liang HANG Zhan-Zhong IKOHAGI Toshiaki.NUMERICAL MODELING OF UNSTEADY VISCOUS CAVITATION FLOWS[J].Journal of Engineering Thermophysics,2004,25(5):783-785. |
| |
| Authors: | WANG Guo-Yu FANG Tao CAO Shu-Liang HANG Zhan-Zhong IKOHAGI Toshiaki |
| |
| Abstract: | 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. |
| |
| Keywords: | cavitation flow model numerical simulation |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
