扩压器流场的数值模拟  

Numerical Simulation of Flow Field in Diffuser

作　　者：张亚[1] 翟悦[1] 

机构地区：[1]中国船舶重工集团公司第七一八研究所,河北邯郸056027

出　　处：《舰船防化》2014年第4期47-50,共4页

摘　　要：运用Fluent软件对5种不同结构型式扩压器的流场进行了数值模拟,获得了各流场参数分布,分析了不同结构型式扩压器的流场特点、压力恢复性能;研究了扩压器出口背压对流场参数的影响。结果表明:扩压器采用适当的扩张角和合适的长度时具有较好的压力恢复性能;随着扩压器出口背压的增大,恢复压力提高,但较高的背压会使激波串向扩压器入口移动,从而干扰入口上游的流场。Using the Fluent software, the flow fields for five different configurations were numerically simulated. Contours of different flow field parameters were obtained. The flow field characteristics and the pressure recovery performance for different diffuser configurations were analyzed. The influence of diffuser outlet back pressure on flow filed characteristics was studied. The results indicated that the diffuser wi.th the small divergent angle and the fit length had better pressure recovery performance; and the recovery pressure could be improved by means of increasing the diffuser back pressure. However the shock might move towards the inlet of diffuser with the back pressure increasing, as a result, the upriver flow field inside the optical cavity might be disturbed.

关 键 词：化学激光器 扩压器 数值模拟 压力恢复 

分 类 号：TN248.5[电子电信—物理电子学]