摘要
推导了自然曲线坐标系下时间平均的多组分扩散方程。引入施密特数Sc与路易斯数Le来求解质量扩散系数。在原程序基础上,增加了对冷气组分扩散方程的求解,以及多组分对比热和气体常数的影响。然后用改进的程序对某型两级带冷气喷射的涡轮叶栅进行了全三维N-S方程数值求解,计算结果与采用原程序的结果进行对比,表明在冷气掺混计算中考虑组分扩散影响后,涡轮内流场结构以及热力参数都有了很大的不同。
The investigation is intended to verify a coupled solver developed for turbines to illustrate how transition exerts effects on the predicted thermal loads. The solver couples the N-S solver named HIT-3D, with a thermal conduction module using the finite difference method. Three operating conditions of the NASA-MarkII vane are selected to be the cases for tests. The models used in the simulations include Baldwin-Lomax (B-L) algebraic model, q-ω low-Re model and B-L & Abu-Ghannam and Shaw (AGS) model. The pre...
基金
National Natural Science Foundation of China (50476028, 50576017, 50706009)
关键词
涡轮
气热耦合
湍流模型
转捩流动
边界层流动
turbines
heat transfer
turbulence model
transition flow
boundary layer flow
