Assessment of reynolds stress turbulence closures in the calculation of transonic, separated flow

摘要

In this study, performances of various turbulence closure models are evaluated int he Reynolds-averaged Navier-Stokes analysis of a transonic lfow. In the calculation of transonic lfow over axisymmetric bump, k-epsilon, explicit algebraic stress, and two Reynolds stress models, i.e., GL model proposed by Gibson & Launder and SSG model proposed by speziale Sarkar & Gatski, ar echosen as turbulence closure models. The governing equations in generalized curvilinear coordinates for mean flow and turbulence are discretized by finite volume method. Computational results show that SSG model gives best overall predictions for pressure coefficients and locations of shock and separation. however, in the predictions for mean velocities and turbulent stresses, the results with Reynolds stress models do not show good agreements with experimental profiles.