通气超空泡多相流场数值仿真方法

摘要

通气超空泡流动涉及多相流动、湍流、相变及可压缩等流体力学难点问题，流动机理非常复杂。其中多相流模型是通气超空泡数值仿真研究工作的重点，将严重影响通气超空泡数值仿真结果的精度。本文有针对性地对比了目前广泛采用的均质平衡流模型和欧拉双流体模型，结合作者所在课题组多年来在水洞试验和数值仿真方面的研究成果，从空泡形态和流体动力两方面分析了欧拉双流体模型在预测通气超空泡方面的优势。随着研究的进一步深入，通气超空泡数值仿真方法有望成为超空泡减阻技术的重要研究手段，可以为工程设计提供参考。%Ventilated supercavitating flow involves such topics in fluid mechanics as multiphase flow, turbulence, phase change and compressibility, its mechanism is very complex. The multiphase flow model has attracted much more atten-tion in the study of numerical simulation of supercavitating flow, however its accuracy in simulation is not satisfactory. In this paper, the homogeneous model, which are widely used in the world, are compared with the Euler two-fluid model by combining with the authors′ research by means of water tunnel experiments and numerical simulation. The advan-tages of the Euler two-fluid model in predicting ventilated supercavitation is analyzed in terms of cavity shape and hy-drodynamics of a vehicle. Numerical simulation of ventilated supercavitation is expected to become an important ap-proach of drag-reduction technology through supercavitation.