大流量标准Y型喷嘴内部流动特性的数值模拟  

Numerical Simulation of the Flow Characteristics Inside a Large Flow Rate Y Type Nozzle

作　　者：陈鹏飞[1] 费俊[1] 李龙飞[1] 杨伟东[1] 

机构地区：[1]西安航天动力研究所,陕西西安710100

出　　处：《热能动力工程》2014年第6期688-691,760-761,共4页Journal of Engineering for Thermal Energy and Power

摘　　要：采用计算流体动力学方法对大流量标准Y型喷嘴内部的流动特性进行了数值模拟,通过计算获得了喷嘴内部的流动特性,并研究了气耗率变化对喷嘴出口流动状态的影响。结果表明:当气耗率较小时,喷嘴出口表现出环状流特征;当气耗率较大时,出现类雾状流特征;进一步增大气耗率对气液掺混效果改善作用有限。数值计算获得的流量数据与试验结果吻合较好,液流量相对误差小于5%,气流量相对误差小于10%。By using the methods proposed in the CFD,numerically simulated were the flow characteristics inside a large flow rate standard Y type nozzle,emulated and calculated were the flow characteristics inside the nozzle and studied was the influence of the change in the air consumption rate on the flow state at the outlet of the nozzle.The calculation results show that when the air consumption rate is relatively small,the flow at the outlet of the nozzle displays the annular flow characteristics.When the air consumption rate is relatively big,the flow at the outlet of the nozzle ex-hibits the quasi-dispersed flow characteristics.The role of further increasing the air consumption rate played in improving the gas-liquid dilution-mixing effectiveness is limited.The data of the flow rate obtained during the numerical calculation is in relatively good agreement with the test data.The relative error of the liquid flow rate is less than5% and that of the gas flow rate is less than 10%.

关 键 词：标准Y型喷嘴 气耗率 流动特性 两相流 数值模拟 

分 类 号：TK223[动力工程及工程热物理—动力机械及工程]