五叶螺旋桨空泡演化及流场特性数值模拟研究

Numerical Simulation of Cavitation Evolution and Flow Field Characteristics of Five-blade Propeller

为研究五叶螺旋桨空泡演化及流场特性,基于完整Rayleigh-Plesset空化模型,建立适用于螺旋桨非定常空化模拟的数值方法。采用多套计算网格,对DTMB4381标准五叶螺旋桨在不同进速系数下推进性能的模拟结果和试验结果进行对比,验证空化数值预报模型的准确性。结果表明:该文所建立的空泡分析模型,可以准确分析空泡发展的2个典型阶段以及临界状态,对螺旋桨空化、空泡溃灭和空泡共振等复杂现象较好地模拟,实现螺旋桨激励下空泡完整演化过程的仿真。

In order to study the cavitation evolution and flow field characteristics of a five-blade propeller,a numerical method for unsteady cavitation simulation of a five-blade propeller is established based on the complete Rayleigh-Plesset cavitation model.Several sets of calculation grids are used to compare the simulation and test results of the propulsion performance of DTMB4381 standard five-blade propeller under different speed coefficients,and the accuracy of the cavitation numerical prediction model is verified.The results show that the cavitation analysis model established in this paper can accurately analyze the two typical stages and critical states of cavitation development,and simulate the complex phenomena such as propeller cavitation,cavitation collapse and cavitation resonance.The complete evolution process of cavitation excited by propeller is simulated.