摘要
利用计算流体力学软件,对粘性不可压缩流体的平板翼型绕流进行了三维数值模拟,采用有限体积法计算程式,求解不可压缩Navier-Stokes方程,模拟平板翼型在尾缘有无吹气时的流动情况,得到了平板翼型尾迹的传播特性。并使用四种常用湍流模型在相同的网格条件下进行数值模拟,模拟结果与相应的试验数据对比,分析各种湍流模型对带尾缘吹气的三维模型数值模拟结果的影响,得出了不同湍流模型对带尾缘吹气的模型的适用性以及精度的评估性结论。数值模拟的结果表明SST湍流模拟对模拟尾迹区流动具有很好的适应性,预测得到的轴向速度分布、尾迹特征长度变化以及流动相似性和试验结果进行了对比,和试验结果吻合较好。
A viscous,incompressible and 3D flow around a plate airfoil was numerically simulated using CFD software.The finite volume method for incompressible Navier-Stokes equations is employed in the program to simulate the flow in the wake of the plate airfoil with and without trailing edge blowing.The wake spreading characteristics of the airfoil are gained through the simulation.The CFD simulation was carried out using four turbulence models in the commercial CFD software under the same grid system.Then results were compared with the experimental results.The turbulence model effect to the wake flow simulation of plate airfoil with trailing edge blowing was analyzed and gains the evaluating conclusion of the turbulence model adaptability on the model with trailing edge blowing.According to the simulation results,SST turbulence model shows well adaptability to simulate the wake flow.The axial velocity profile,wake characteristic length scale and flow similarity gained through CFD simulation using SST turbulence model agree well with the experiment.
出处
《流体机械》
CSCD
北大核心
2011年第12期18-22,83,共6页
Fluid Machinery
关键词
尾迹
无动量亏损尾迹
数值模拟
湍流模型
尾缘吹气
wake
momentumless wake
numerical simulation
turbulence model
trailing edge blowing
