Abstract

The paper substantiates selection of boundary conditions for correct modeling of gas motion in a turning-and-expanding flow. The choice is based on comparison of calculation results and experimental data. Measurements of average and pulsation values of flow velocity were carried out by the method of laser Doppler anemometry. The numerical modelling was performed on the basis of known modern turbulence models: \(k\)-\(\varepsilon\) model and Reynolds stress transfer model. A comparative analysis of the models was done. The comparison was made for the surfaces of the axial velocity component in a cross section. The data obtained can be useful for determination of the limits of applicability of various turbulence models and for verifying CFD codes.

中文翻译：

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$$k{-}\varepsilon$$湍流模型和雷诺应力传递模型的湍流气体运动建模问题中设置边界条件的特征

摘要

该论文证实了边界条件的选择，以正确模拟旋转和膨胀流中的气体运动。选择是基于计算结果和实验数据的比较。流速的平均值和脉动值的测量采用激光多普勒测速法。数值建模是在已知的现代湍流模型的基础上进行的：  \(k\) - \(\varepsilon\) 模型和雷诺应力传递模型。对模型进行了比较分析。对横截面中轴向速度分量的表面进行了比较。获得的数据可用于确定各种湍流模型的适用范围和验证 CFD 代码。