Numerical simulation of nozzle's flow field based on mixed implicit iteration-analysis algorithm for two equation turbulence model

The flux modification of Harten's second-order TVD scheme, coupled with implicit iteration-analysis algorithm, is employed to overcome the computational stiffness of k-ε turbulence model. Internal flow field of an axisymmetric nozzle and internal-external flow field of a two-dimensional nozzle are simulated to confirm the improvement of calculation efficiency by the above methods when using improved multigrid strategy. The calculation results are compared with experimental data.