带全附体潜艇尾流场的数值预报研究

Numerical Simulation of Flows over Underwater Axisymmetric Bodies with Full Appendages

本文在人工可压缩性方法得到的不可压缩守恒型 Navier-Stokes方程的基础上 ,引入高精度的三阶基本无振荡格式 (ENO)及通量分裂形式的 LU分解方法 ,对某潜艇模型全附体的尾流场进行了数值模拟 。

The numerical method based on fiux difference splitting LU, implicit high resolution third order essentially non oscillatory (ENO) schemes are constructed for efficient computation of steady state solution to the three dimensional, incompressible Navier Stokes equations in curvilinear coordinates. The flows over underwater axisymmetric bodies with a fairwater and four stern appendages are calculated. The numerical results show that the circumferential average nondimensional velocities along the axis of the body at propulsor plane are in good agreement with the measurement, which can meet the need of wake profile accuracy in propulsor design. Meanwhile the circumferential distributions of numerical non dimensional velocity at the propulsor are similar to the measurement, which can be used to predict the water noise generated by the propulsor.