Turbulence Model for Calculating Supercavitating Vehicle Viscous Flow Filed and Numerical Simulation of Supercavitation Submarine
This work is supported by Department of Naval Architecture and Ocean Engineering.
The turbulent model is very important factor which can influence the results in the calculation on the viscous flow of supercavitating vehicle. 3 kinds of turbulent models and 6 kinds of cavitation numbers were used to calculate the cavity length, the maximum section width and length width ratio of tailless torpedo model. The applicability of three turbulence models in the calculation on viscous supercavitating vehicle flow is studied. It is found that Stan k-ε model is not sensitive to the change of cavitation number in calculating the cavity length of supercavitating vehicle. When the cavitation number is close to 0.1 or 0.01, the results of numerical simulation and the results of Logvinovich empirical formula have good consistency. Moreover, with the cavitation number decreased, the cavitation cavitation maximum cross-sectional area and aspect ratio of numerical simulation of RNG k-ε model have the same trend with empirical formula, and both of them have good consistency. The cavity length of simulation results of Rea k-ε model are greatly influenced by the cavitation number. The difference in Rea k-ε model simulation results and empirical formula are relatively large.
