射流元件控制通道流动的三维数值模拟

Three dimension numerical simulation of a jet device control channel

针对一种射流元件控制通道的复杂结构 ,采用分块对接技术和网格“融合”技术生成计算网格 ,并运用五步显式格式的 Runge-Kutta法和多重网格法对含全 N-S方程、RNG k-ε湍流模型和两层分区壁面模型的流动模型进行数值求解。通过对控制通道内部流动的数值模拟和流场特性分析 。

The multi-block patching and grid merging technique are adopted to generate computation grid for the complex structure of a jet device control channel. A Runge Kutta method with 5 stage explicit scheme and a multi-grid method are applied to solve the flow model, which includes the whole N S equation, RNG k-Ε turbulence model and two layer zonal wall model. On the basis of numerical simulation and fluid field analysis, an improved scheme to the structure of control channel is put forward.