区域法数值模拟短突扩压器流场

Annular Combustor Dump Diffuser Flow Computations Using a Zonal Approach

在一般曲线坐标下对环形燃烧室短突扩压器和其内外环通道流场进行了数值模拟。紊流特征采用工程上常用的ｋ－ε双方程模型来描述。使用壁面函数法处理曲线壁面边界，采用非交错网格系统和ＳＩＭＰＬＥ算法求解各守恒方程。为了计算方便，利用区域法对复杂的流道进行分块处理。计算所得的速度和压力分布较为合理，表明本计算方法是可行的。

Describes an annular combustor dump diffuser flow computational procedure for gas turbine combustion systems. The method is based on the solution of the Navier Stokos equations in a generalized non orthogonal curvilinear coordinate system. The governing equations are discretized by the control volume on a non stagged grid system. To take into account the complex geometry of the dump diffuser, a zonal approach is used here. Results have been presented for a simplified axisymmetric simulation and show that the computational program used in the study is fairly reasonable.