Numerical Simulation of Unsteady Turbulent Flow Around Maneuvering Prolate Spheroid
Numerical Simulation of Unsteady Turbulent Flow Around Maneuvering Prolate Spheroid
复制标题
机动长椭球体周围非定常湍流的数值模拟
DOI：
10.2514/2.1534
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
T. Hino
中科院分区：
文献类型：
--
作者：
S. Rhee;T. Hino
本文发展了一种三维雷诺平均Navier-Stokes方法，用于研究潜艇机动飞行器的非定常湍流流动，并将其应用于潜艇极端机动的模型问题。在动量方程中加入了体积力项，以考虑固体坐标系中的惯性运动。湍流闭合采用Spalart-Allmaras湍流模型。在速度-压力耦合的连续性方程中引入人工压缩系数。控制方程在空间上采用二阶精度有限体积法离散，在时间上采用二阶精度向后格式离散。对计算结果进行了整体和局部定量分析，并与实验数据进行了比较。总体而言，本方法在预测与机动长椭球体相关的非定常流动现象方面表现得相当好，并且结果与现有的实验数据进行了比较
A three-dimensional Reynolds averaged Navier-Stokes method for unsteady turbulent flow around a maneuvering vehicle was developed and applied to a model problem concerning an extreme case of submarine maneuvers. A body force term is added in the momentum equations to take into account the inertial motion in the body-fixed coordinate system. The Spalart and Allmaras turbulence model is employed for turbulence closure. An artificial compressibility is introduced into the continuity equation for velocity-pressure coupling. The governing equations are discretized by second-order accurate finite volume method in space and second-order accurate backward scheme in time. The computational results are analyzed with global and local quantities and validated by comparison with experimental data. Overall, the present method performs quite well in predicting the unsteady flow phenomena associated with a maneuvering prolate spheroid, and the results compare well with available experimental data