A Contribution to Study on the Lift of Ventilated Supercavitating Vehicle With Low Froude Number

作者：Yu Kaiping^*; Zhou Jingjun; Min Jingxin; Zhang Guang

来源：Journal of Fluids Engineering-Transactions of the ASME, 2010, 132(11): 111303.

DOI：10.1115/1.4002873

• ventilated cavity
• two-fluid multiphase flow model
• SST turbulence model
• double-vortex tubes
• lift coefficient

A ventilated cavity was investigated using three-dimensional numerical simulation and cavitation water tunnel experiments under the condition of low Froude number. A two-fluid multiphase flow model was adopted in numerical predictions. The drag between the different phases and gravitational effect, as well as the compressibility of gas, was considered in the numerical simulations. By comparing the ventilated coefficient computational results of three different turbulence models with the Epshtein formula, the shear-stress-transport turbulence model was finally employed. The phenomenon of double-vortex tube gas-leakage was observed in both numerical simulations and experiments. Based on the validity of the numerical method, the change law of the lift coefficient on the afterbody was given by numerical predictions and accorded well with experimental results. The cause for the appearance of an abrupt increase in lift was difficult to get from experiments for the hard measurement, whereas the numerical simulations provided some supplements to analyze the reasons. The distribution of lift coefficient on the afterbody had important significance to the design of underwater vehicles. [DOI: 10.1115/1.4002873]

• 出版日期2010-11
• 单位哈尔滨工业大学