两方程湍流模型混合隐式迭代/解析算法研究

摘要

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-e 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.%采用通量修正二阶TVD格式和混合隐式时间推进/解析算法求解κ-ε湍流模型的输运方程以克服其计算刚性.通过过膨胀状态下轴对称喷管内流场、带圆转方型面二元喷管内外流场两个算例,验证了其配合改进的多重网格算法对计算效率的提高.计算结果与试验数据进行了对比.