摘要
燃烧室出口温度场与主燃孔、掺混孔进气均匀性和主燃孔、掺混孔射流在火焰筒内的油气掺混有关。为获得均匀的出口温度分布,需要火焰筒各孔的进气一致性较好。气流通道内的速度分布对大孔进气均匀性有直接影响,而机匣型面是影响气流通道内速度分布的主要因素之一。针对内气流通道中速度分布差异性较大的问题,在全环试验器上开展了不同内机匣型面对燃烧室出口温度分布影响的试验研究。结果表明:根据原方案流场形态适当地优化内机匣型面,可以改善内气流通道内的速度分布,减小内突扩段回流区的大小,改善火焰筒进气一致性,从而改善燃烧室出口温度分布;过度压缩内机匣流道,会导致燃烧室出口径向温度分布曲线出现“双峰”现象,使出口温度场恶化。
The outlet temperature distribution of the combustion chamber is not only related to the air inflow uniformity of the primary holes and dilution holes,but also to the fuel-air mixing of their inflow jets within the flame tube.For the sake of obtaining the uniform exit temperature distribution,it requires that the jet flows of the primary holes and the dilution holes should have good uniformity,which is directly influenced by the velocity distribution in the airflow passage.Inner casing profile is one of the major factors that affect the velocity distribution in the passage.The effect of the inner casing profile on the combustor outlet temperature distribution on the full annulus test rig was studied in view of the problem about the significant difference of the velocity distribution.According to the test results,proper modification of the inner casing profile can improve the uniformity of the velocity distribution in the passage and decrease the area of the circumfluence in order to increase the uniformity of the liner jet flows and tailor the combustor exit temperature distribution.However,excessive reduction of the inner passage height may lead to double-peak of the combustor exit radial temperature distribution,which will make the exit temperature distribution worse.
作者
王培
刘新生
赵雅婷
周孙宇
黎武
WANG Pei;LIU Xinsheng;ZHAO Yating;ZHOU Sunyu;LI Wu(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China)
出处
《燃气涡轮试验与研究》
2025年第6期42-46,共5页
Gas Turbine Experiment and Research
基金
国家级科研项目。
