平衡孔对轴流式透平气动性能影响的试验和数值研究  

Experimental and Numerical Study on Influence of Balance Hole on Aerodynamic Performance of Axial Flow Turbine

作　　者：钟主海[1] 孙奇[1] ZHONG Zhuhai;SUN Qi(Dongfang Turbine Co.,Ltd.,Deyang 618000,Sichuan Province,China)

机构地区：[1]东方汽轮机有限公司,四川德阳618000

出　　处：《动力工程学报》2022年第12期1206-1212,共7页Journal of Chinese Society of Power Engineering

摘　　要：在3级空气透平试验台上,开展了变平衡孔面积对透平气动性能影响的试验研究。同时对试验透平级进行数值计算分析,研究了透平级性能随平衡孔面积变化的规律,并与试验结果进行了对比。结果表明:无平衡孔时透平效率最低,平衡孔直径小于25 mm,效率随平衡孔直径的增大而逐渐提高,但之后逐渐降低。计算得到的效率变化规律与试验结果吻合良好,平衡孔与隔板汽封漏气面积比为2~3时,效率最优。An experimental study on the influence of the variation of balance hole area on the aerodynamic performance of turbine was carried out with a three-stage air turbine test bench.Numerical calculation and analysis of the test turbine stage were carried out,and the rule of the turbine stage performance change with the balance hole area was studied,and the numerical results were compared with the test results.Results show that the stage efficiency is the lowest when there is no balance hole,and for the balance hole with diameter less than 25 mm,the stage efficiency increases with the increase of balance hole diameter,and then decreases gradually.The calculated efficiency change rule is in good agreement with the experimental results.The efficiency is optimal when the leakage area ratio between the balance hole and the diaphragm seal is 2-3.

关 键 词：轴流式透平 腔室 平衡孔 效率 

分 类 号：TK264.9[动力工程及工程热物理—动力机械及工程]