A one-equation transition model is proposed for high-speed transitional flows. The model is based on the amplification-factor-transport framework and involves only one transport equation for the amplification factor of streamwise instabilities. A new algebraic intermittency factor is established and applied to a turbulence model to predict transition, and the model is tested by applying it to several cases over a wide speed range. Comparisons with linear stability theory and available experimental data indicate that the model handles first- and second-mode-induced transitions in supersonic and hypersonic flows and reasonably captures the effects of Mach number, wall-to-edge temperature ratio, and nose bluntness. The new one-equation model offers reduced computational burden and simpler implementation while retaining a reasonable prediction accuracy.
One-Equation Amplification-Factor-Transport Transition Model for High-Speed Flows
AIAA Journal ; 63 , 1 ; 42-54
2025-01-01
Article (Journal)
Electronic Resource
English
A CFD-Compatible Transition Model Using an Amplification Factor Transport Equation
British Library Conference Proceedings | 2013
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