地面燃气轮机单管燃烧室流量分配试验

Experiment on mass flow distribution of ground gas turbine single tube combustor

对设计的100kW地面燃气轮机单管燃烧室空气流量分配进行了试验研究。在常压环境下采用堵孔法分别得到了旋流器、主燃孔和掺混孔的流量特性曲线,分析得到燃烧室不同结构的流量系数;试验研究了不同进口流量条件下燃烧室的流量分配,测量得到了燃烧室总压损失。研究发现:随着进口空气流量的增加,燃烧室的流量分配比例基本保持稳定,并且与燃烧室的设计空气比例基本吻合;随着燃烧室进口流量(雷诺数)的增加,旋流器、主燃孔和掺混孔的流量系数呈线性降低;随着进口流量(雷诺数)的增加,燃烧室总压损失逐渐增大;对主燃孔和掺混孔的流量特性测量中,两种测量方法得到的试验结果稍有差别,总体上看两种测量方法的试验结果较为接近。通过对比分析证明两种试验测量方法真实可靠,该研究结果可为100kW地面燃气轮机燃烧室的设计与优化提供依据。

The air flow distribution in a designed single tube combustor（for 100 kW ground gas turbine）was experimentally investigated.Under the atmospheric pressure condition,the flow distribution characteristics of the swirlers,primary holes and dilution holes were experimentally obtained using hole plugging method separately,and the discharge coefficients for different structures were analyzed based on the experimental data.Then the flow distribution and total pressure loss of the single tube combustor were studied under different inlet air flows.Results showed that the air flow distributions of different structures were stable when the inlet air flow varied,and agreed very well with the designed data.With the increase of the inlet air flow（inlet Reynolds number）,the discharge coefficients for swirlers,primary holes and dilution holes decreased slightly,but the total pressure loss increased gradually.The experimental results of primary holes and dilution holes by using two flow distribution experiment methods were slightly different but basically the same for the air distribution,therefore,the two different experiment methods were reliable.The experimental results can provide an optimiza-tion basis for the design of 100 kW ground gas turbine single tube combustor.