面积比对前可变面积涵道引射器性能影响的数值研究  

Numerical simulation study on the effect of area ratio on the front variable area bypass injector performance

作　　者：陈佳 胡文兵 肖双强 伍鑫 岳定阳 CHEN Jia;HU Wen-bing;XIAO Shuang-qiang;WU Xin;YUE Ding-yang(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500

出　　处：《燃气涡轮试验与研究》2020年第6期16-21,共6页Gas Turbine Experiment and Research

摘　　要：为研究面积比对前可变面积涵道引射器性能及主、次流掺混机理的影响,采用三维数值模拟方法,对不同面积比下前可变面积涵道引射器的工作特性及主、次流掺混流场进行了分析。结果表明:随着面积比增加,主、次流掺混损失及摩擦损失逐渐增大,前可变面积涵道引射器总压恢复系数减小;当进口压比不变,面积比由0.40减小至0.20过程中,次流流量基本保持不变,达到扼流状态,且进口压比越大达到扼流状态时的面积比越大;不同进口压比下,面积比减小,沿顺气流方向各截面总压恢复系数减小且减小趋势逐渐平缓;在面积比减小过程中,主、次流掺混引起的流动不均匀区域减小,掺混层厚度逐渐变窄。In order to study the effect of area ratio on the front variable area bypass injector(FVABI)perfor⁃mance and internal and external bypass flow mixing mechanism,the 3-diminsional numerical simulation approach was employed to analyze the FVABI performance as well as mainstream and secondary flow mix⁃ing flow field under different area ratio.The results reveal that as the area ratio gradually increases,the flow mixing and friction loss are greater and the total pressure recovery coefficient of FVABI decreases.On the other hand,when the inlet pressure ratio is constant and the area ratio is reduced from 0.40 to 0.20,the sec⁃ondary flow is basically unchanged reaching the choke state;and the larger the inlet pressure ratio is the larger the area ratio under the choke state.Under different inlet pressure ratio,the trend of the total pres⁃sure recovery coefficient is reduced by the decrease of the area ratio.As the area ratio decreases,the irregu⁃lar flow region of the main flow and secondary flow mixing will reduce,and the thickness of the mixing layer is gradually narrowed.

关 键 词：变循环发动机 前可变面积涵道引射器(FVABI) 面积比 掺混机理 总压损失 扼流 三维数值模拟 

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]