基于非定常射流的对转涡轮气动调节性能研究  

Research on Aerodynamic Regulation Performance of Counter-rotating Turbine Based on Unsteady Jet Flow

作　　者：杨荣菲[1] 祝涛冉 YANG Rongfei;ZHU Taoran(College of Energy and Power,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]南京航空航天大学能源与动力学院,江苏南京210016

出　　处：《机械制造与自动化》2022年第6期173-176,197,共5页Machine Building & Automation

基　　金：航空动力基金项目(6141B09050339)。

摘　　要：在叶片表面布置冷气射流是实现对转涡轮气动调节的一种有效措施。在对转涡轮的高压级导叶喉道附近的上游布置射流孔,非定常数值仿真研究了射流流量正弦波、方波形式变化时涡轮气动性能的变化情况,并与定常射流调节结果进行对比,发现涡轮进口流量变化量仅与非定常射流的时均流量正相关,与射流频率、波形无关;但涡轮效率同时受时均流量、射流频率影响,时均流量越大,涡轮效率衰减越大;随着射流频率减小,涡轮效率衰减量略微降低。由于定常射流更易实现,故定常射流更具工程应用价值。It is an effective measure to arrange the cold air jet on the blade surface for realizing the aerodynamic control of the counter-rotating turbine. Jet holes were arranged in the upstream near the throat of the high-pressure stage guide blade of the converse turbine. Unsteady numerical study was carried out on the variation of turbine aerodynamic performance when the form of sinusoidal and square wave of jet flow was changed, and its results were compared with those of steady jet. It is found that turbine inlet flow variation is only positively correlated with the time-average flow of unsteady jet, having nothing to do with jet frequency and waveform. However, the change of turbine efficiency is affected by both hourly flow rate and jet frequency. The greater the hourly flow rate is, the greater the attenuation of turbine efficiency will be. With the decrease of jet frequency, the attenuation of turbine efficiency will decrease slightly. As it is easier to achieve steady jet, the steady jet has more engineering application value.

关 键 词：对转涡轮 非定常射流 定常射流 气动调节 

分 类 号：V231.3[航空宇航科学与技术—航空宇航推进理论与工程]