针对国家数值风洞（NNW）工程高超声速三维边界层转捩预测需求，开展了高超声速边界层横流转捩判据及模型研究。采用线性稳定性分析eN方法对高超声速转捩数据进行扩展，结合横流强度与表面粗糙度构造当地化的高超声速横流转捩判据，对基于Chant 2.0计算平台的高超声速修正γ-Reθ转捩模型进行了横流模式拓展，建立了适用于高超声速三维边界层横流转捩预测的C-γ-Reθ转捩模型。采用构建的转捩模型对多状态下的高超声速尖锥进行横流转捩预测，取得了与试验结果符合较好的预测效果。
To meet the need for hypersonic three-dimensional boundary layer transition prediction for the National Numerical Windtunnel (NNW) Project, we study the hypersonic cross-flow transition criterion and the transition model. The hypersonic database is expanded using the linear stability theory of the eN method, a fully-localized hypersonic cross-flow transition criterion constructed combining the cross flow strength and surface roughness, a cross-flow extension of the hypersonic modified γ-Reθ transition model conducted based on the Chant 2.0 computing platform, and a C-γ-Reθ transition model suitable for hypersonic 3D boundary layer transition prediction established. The transition model is used to predict the cross-flow transition on hypersonic sharp cones in multiple states, and the predicted results are in good accordance with the experimental results.
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