实效伴流雷诺数影响的数值模拟

Numerical Simulation of Reynolds Number Effect on Effective Wake

本文用数值计算的方法模拟三维船舶尾流与螺旋桨之间的相互作用，计算在四个不同量级雷诺数情况下（包括实船雷诺数１．６７×１０９和模型雷诺数１．６７×１０６）的水动力性能。船桨干扰采用三维不可压ＲＡＮＳ方程、ｋ－湍流模型和升力面理论作为基本研究工具进行相互干扰和迭代来预报此复杂流场及其螺旋桨的水动力性能。比较四个不同量级雷诺数情况下实效伴流分布及实效伴流分数的计算值，初步探索实效伴流的雷诺数影响。

The Reynolds number effect of the interaction between the three-dimensional ship stem with multi propellers and its corresponding hydrodynamic performance under four different orders of Reynolds number(including full scale Reynolds number 1.67×10 and medel scale Reynolds Reynolds number 1.67×10) are investigatednumerically in this paper. This approach to propeller-hull interaction uses three-dimensional unsteady RANSequation coupled with a propeller performance program in an interactive and iterative manner to predict the complicated flow field and hydrodynamic performance of propeller. By comparing the calculated effective wake distribution and fraction under four different orders of Reynolds number, the scale effect of nominal and effective wakedistribution is investigated and discussed.