摘要
采用发展的基于Reynolds-Averaged Navier-Stokes方程和液相/气相界面跟踪方法的单相空化模型和数值迭代算法,数值预测了二维弯管内空化空泡的形状和相应的压力系数分布。将发展的二维空化模型和算法推广到三维空化流动的数值模拟,预测了三维非对称弯管内的三维空泡形状和流动特性。数值预测三维非对称弯管内空化流动时的空泡位置和相应压力系数分布符合理论分析结论。研究结果证明了所发展的空化模型和算法能够应用于三维空化流动时的数值预测。
The cavitation bubble and corresponding pressure coefficient distribution in the two dimensional bend pipe under cavitating flow were numerically predicted using development of the liquid/vapor interface tracking method and Reynolds-Averaged Navier-Stokes solution. The vapor/liquid interface is treated as a free boundary and its shape is determined using an iterative procedure to match the cavity surface to a constant pressure boundary. The pressure distribution, as well as its gradient on the wall, was taken into account in updating the cavity shape iteratively. Cavitating flows in the three-dimensional axisymmetric bend pipes were numerically predicted using presented cavitation model and algorithms. The obtained three dimensional cavitation bubble and corresponding pressure coefficients contours are well agreement with the theoretical analysis. The reliability and accuracy of the presented cavitation model and algorithms are also demonstrated.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第12期2037-2039,共3页
Journal of Engineering Thermophysics
基金
高等学校博士学科点专项科研基金(No.20040698049)
关键词
弯管
空化
液相/气相界面跟踪方法
数值预测
bend pipe
cavitation
vapor/liquid interface tracking method
numerical prediction
