Numerical Investigation of Turbulent Transition by A Correlation-Based Model on Unstructured Meshes
The present study assessesthe performance of a correlation-based transition model(transition SST model) which is based on the SST model. The details of the transition phenomenon and differences between the fully turbulent models and the transition model were investigated. For the comparison with the fully turbulent models, S-A and SST model were used. A vertex-centered finite volume method and an unstructured mesh technique were used to discretize the computational domain. The inviscid fluxed were calculated by using 2nd order Roes FDS and the viscous fluxes were computed based on central differencing. The Gauss-Seidel iteration was used for the time integration. For the assessment, two airfoils(Aerospatial A-airfoil and S809 airfoil) were adopted. The laminar separation bubble on the surface of the airfoils was detected with the transition SST model. This separation bubble caused the separationinduced transition where a laminar boundary layer terminated and turned into a turbulent boundary layer. The pressure and skin-friction distributions changed abruptly after the transition. By detecting the transition phenomenon, the transition model predicted better matched force coefficients with experimental data than the fully turbulent models.
Laminar-turbulence transition Correlation-based transition model Unstructured meshes
Ju Yeol You Oh Joon Kwon
Department of Aerospace Engineering.KAIST, Daejeon 305 - 701, Korea
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
475-478
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）