带隔热屏加力燃烧室热态流场计算

在任意曲线坐标系下对带有横向波纹隔热屏、外冷却通道和尾喷口的涡喷加力燃烧室的三维热态流场进行数值模拟.利用椭圆型微分方程和区域法生成三维贴体网格, k-ε模型预估紊流特性, EBU-Arre-henius紊流燃烧模型估算化学反应速率, 六通量模型预估辐射通量以考虑其对壁面和气流温度的影响.在非交错网格系统下应用混合差分格式离散控制方程, SIMPLE算法求解离散方程, 数值分析两种进口气流参数分布对加力室热态流场和壁温分布的影响.所得计算值与试验数据基本相符, 表明计算方法合理. 

Turbulent combustion flow field calculation for afterburner with heat shied

In an arbitrary curvilinear coordinate system, numerical simulation was performed for 3D turbulent combustion flow field of the afterburner with the cross-rippled heat shield, outer cold passage and jet nozzle.The body-fitted grids were generated using a system of elliptical partial differential equations.The k-ε model was employed to describe the turbulent characteristics.EBU-Arrehenius turbulent combustion model was used to determine the chemical reaction rate, while a six-flux model was applied to predict heat radiation and its influence on the wall and gas temperature.The discretion of governing equations in a non-staggered grid system was obtained by hybrid scheme and was solved with SIMPLE algorithm.The influences of two different inlet gas parameter distributions on afterburner flow characteristics and wall temperature profiles were analyzed numerically.Calculations were in good agreement with the experimental data and show that numerical procedures are fairly reasonable.