【摘要】 通过数值求解不可压缩粘性流的RANS方程计算均匀来流中的船舵水动力。采用标准的k -ε湍流模式封闭方程 ,并用二阶有限体积法在非交错分区贴体网格上对守恒方程进行离散 ;采用Rhie和Chow的插值方法确定单元面的质量通量 ,用SIMPLE法求解压力分布 ,用壁函数法处理壁面边界条件。对一种NACA翼型舵在两种不同雷诺数下大攻角范围的流动进行了计算 ,得到的舵水动力与试验结果和他人的计算结果进行比较 ,在舵未达到失速角前吻合良好 ,而所确定的舵失速角与最大升力值则均偏小。失速角后舵背流面的流动分离点也能捕捉到。最后分析了雷诺数对舵水动力的影响。更多还原

【Abstract】 The three-dimensional Reynolds-averaged Navier-Stokes(RANS)equations with the stanˉdard k-εturbulence model as a closure are solved by the standard SIMPLE algorithm for the incompressˉible turbulent flows around a ship rudder in uniform inflow.The conservation equations are discretized on a collocated multi-block body-fitted grid by using a second-order cell-centered finite volume method(FVM).To reduce the computational time,a wall function is used for realizing the non-slip condition at walls.Computations were performed on a rudder attwo different Reynolds numbers with angles of attack rangˉing from0to26degrees.The computed results are in good agreement with the experimental measurements and other authors’computational results,while the calculated stall angles and maximum lifts at stall angles are slightly smaller.更多还原