Comparison of two methods of laminar-turbulent transition prediction for transonic speeds

摘要

Two methods of laminar-turbulent transition prediction are compared in application to transonic flow on an airfoil. An attempt was made to use LST and e~N method for calculating the transition position based on the mean flow obtained with the help of ANSYS Fluent. Two-dimensional flow around RAE (NPL) 5212 airfoil was considered for M_∞=0.5 and M_∞=0.75. The transition positions obtained from stability calculations were compared with results of Transition SST model. Both models showed reasonable results with major difference in the flows with negative pressure gradient.