叶冠齿顶间隙对涡轮气动性能的影响研究  

Effect of Tip Clearance on Aerodynamic Performance of Turbine

作　　者：马石[1,2,3] 刘永葆[1,2,3] 缪四春[4] 罗响午 

机构地区：[1]海军工程大学热科学与动力工程研究室 [2]海军工程大学舰船动力工程军队重点实验室 [3]海军工程大学动力工程学院 [4]91251部队

出　　处：《机械工程与自动化》2015年第2期29-31,共3页Mechanical Engineering & Automation

摘　　要：通过数值方法对某二级带冠涡轮的流场进行研究,分析了齿顶间隙对涡轮气动性能的影响。研究结果表明:泄漏流与主流掺混后形成一个涡流区,改变了叶栅上半通道的流场结构;随着齿顶间隙的增加,涡轮的流量先快速增加后趋于平缓,涡轮的效率先快速减小后趋于平缓;同时发现不同工况下,涡轮的流量和效率的变化趋势相同。The flow field of a two-stage turbine with shroud was studied by a numerical simulation program.The effects of the tip clearance on the turbine aerodynamic performance were analyzed.The simulation results is following：The mixing between leakage and main flow leads to a turbulence area,which alters the flow structure of the upper half channel;With the increase of tip clearance,the flow increases in traffic first and then tends to gentle,the efficiency decreases in traffic first and then tend to gentle;In addition,the flow and the efficiency have the same trends in different conditions.

关 键 词：齿顶间隙 气动性能 涡轮 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术] TK474.7[自动化与计算机技术—计算机科学与技术]