外部横流下不同气膜孔型流量系数敏感性试验研究  

Experimental Study on Sensitivity of Different Film Hole Discharge Coefficients under External Crossflow Con

作　　者：刘峰 徐庆宗 刘昊阳 杜强[2] LIU Feng;XU Qingzong;LIU Haoyang;DU Qiang(Research Center of Fluid Machinery Engineering and Technology,Jiangsu University,Zhenjiang,China,Post Code:212013;Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing,China,Post Code:100190)

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013 [2]中国科学院工程热物理研究所,北京100190

出　　处：《热能动力工程》2024年第11期106-115,共10页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金优秀青年基金项目(52122603);国家自然科学基金青年科学基金项目(52106064);国家科技重大专项(J2019-Ⅱ-0022-0043)。

摘　　要：本文搭建了高速平面风洞实验台,在外部横流马赫数0~0.65、气膜孔压比0~2的范围内对圆柱孔、扇形孔、后倾扇形孔和收敛缝形孔进行了流量系数特性试验。基于试验数据建立了不同气膜孔型流量系数预测模型,完善了收敛缝形孔的流量系数预测模型。结果表明:无外部横流时,流量系数由大到小依次为扇形孔、后倾扇形孔、圆柱孔和收敛缝形孔;有外部横流时,其对气膜孔流量系数影响显著,外部横流降低了气膜孔的流量系数,且气膜孔压比越小外部横流马赫数的影响越大。In this paper,a high-speed plane wind tunnel test platform was built,and the discharge coefficient characteristics of cylindrical holes,fan-shaped holes,laidback fan-shaped holes and convergent slot holes were tested in the range of external crossflow Mach number 0-0.65 and gas film hole pressure ratio 0-2.Based on the test data,the flow coefficient prediction model of different gas film holes was established and the flow coefficient prediction model of convergent slot holes was improved.The results show that when there is no external crossflow,the discharge coefficients are fan-shaped holes,laidback fan-shaped holes,cylindrical holes and convergent slot holes in order from large to small.When there is external crossflow,it has a significant influence on the discharge coefficient of the gas film holes,and the external crossflow reduces the discharge coefficient of the gas film holes,and the smaller the gas film hole pressure ratio,the greater the influence on the Mach number of the external crossflow.

关 键 词：气膜冷却 外部横流 孔型 压比 流量系数 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]