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首页> 外文期刊>TsAGI science journal >NUMERICAL MODELING OF THREE-DIMENSIONAL FLOWS OF VISCOUS GAS IN NOZZLES
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NUMERICAL MODELING OF THREE-DIMENSIONAL FLOWS OF VISCOUS GAS IN NOZZLES

机译：喷嘴中粘性气体三维流动的数值模拟

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摘要

A technique for numerical modeling of turbulent gas flows in three-dimensional nozzles of an ar bitrary shape is developed on the basis of the Reynolds-averaged Navier-Stokes equations written in thin-layer approximation relative to curvilinear coordinates. A two-parameter κ - ε turbulence model, taking into account the wall effect, is employed for computation of the turbulent viscosity. Numerical integrating of motion equations is performed using an implicit difference scheme of the third-order approximation of convection terms. Examples of computations of flow fields in three dimensional nozzles with different cross-sectional shapes (circular, rectangular, and triangular) are presented. Results of numerical computations are compared with experimental data.
机译：基于雷诺数平均的Navier-Stokes方程，以相对于曲线坐标的薄层近似形式编写，开发了一种用于任意形状的三维喷嘴中的湍流气流数值模拟的技术。考虑壁效应，采用两参数κ-ε湍流模型来计算湍流粘度。运动方程的数值积分是使用对流项的三阶近似的隐式差分方案执行的。给出了具有不同横截面形状（圆形，矩形和三角形）的三维喷嘴中流场的计算示例。将数值计算的结果与实验数据进行比较。

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