Further development of the amplification factor transport transition model for aerodynamic flows

Research output: Chapter in Book/Report/Conference proceedingConference contribution

59 Scopus citations


A laminar-turbulent transition modeling framework is presented that is fully compatible with modern computational fluid dynamics solvers. The model is based on the approximate envelope method of linear stability theory, and uses a transport equation describing the evolution of the envelope amplification factor for streamwise instabilities. The amplification factor transport equation is coupled with an intermittency model for robust treatment of the laminar and turbulent regimes. These are coupled with a widely used, one-equation eddy-viscosity model, yielding a three-equation transition/turbulence closure strategy for the Reynolds-averaged Navier-Stokes equations. The model is applied to a variety of test cases, including a flat plate, natural-laminar-flow airfoils, and three-dimensional geometries. Several grid convergence and free-stream sensitivity studies are included to demonstrate the model’s robustness. In comparisons with experimental data, the transittion model was found to significantly improve over fully turbulent predictions both for integrated and distributed loads. The model does, however, lack a deliberate treatment of crossflow instability mechanisms, which is the subject of ongoing research.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
StatePublished - 2019
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: Jan 7 2019Jan 11 2019

Publication series

NameAIAA Scitech 2019 Forum


ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering


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