湍流模型在民机跨声速绕流计算的应用

Investigation on Different Turbulence Models in Transonic Flow of Civil Aircraft

针对民机构型DLR-F6翼身组合体,研究了不同湍流模型对气动特性和流场特征的影响。控制方程采用全场三维可压、雷诺平均的Navier-Stokes方程;计算格式采用Jameson中心有限体积、多步Runge-Kutta时间步长格式进行求解;湍流模型分别采用EARSM k-ω模型、Spalart-Allmaras(S-A)模型、SST模型、Standard k-ω(STD k-ω)模型、Low-Reynolds Number k-ω(LRN k-ω)模型。通过对巡航状态的计算研究,分析了五种湍流模型在翼身结合处气流分离的特点,为工程应用提供了一定的借鉴意义。

Flow around a civil aircraft configuration were simulated by turbulence models resulting different aerodynamic characteristic.The Reynolds-averaged Navier-Stokes equations by finite volume methods using Runge-Kutta time-stepping schemes are chosen and following turbulence models are adopted： EARSM k？ω model,Spalart-Allmaras model,SST model,Standard k？ω model and Low-Reynolds Number k？ω model.The results are presented in this paper by comparing the separation of the wing-body combination.on cruise,and it is helpful for application of turbulence models.