航空燃气涡轮发动机燃气分析测试及计算方法

针对航空燃气涡轮发动机整机及燃烧室部件试验的燃气分析测试,介绍了测试的原理和系统组成,完善了液体碳氢燃料的计算方法,发展了气体燃料的计算方法;分析了燃气组分测量值误差对燃烧参数计算结果的影响,讨论了取样方式及混合式取样器结构的影响,给出了混合式取样器结构是否合理的判定条件;对比了高压全环燃烧室试验的燃气分析和常规测试的结果,结果表明:使用设计合理的混合式取样器、保证足够的测点密度和使用合理配置的燃气分析测试系统,余气系数的测量精度优于5%,并对热电偶法和燃气分析法燃烧效率偏差进行了分析.

Gas analysis test and calculation method of aeroengine

Targeting gas analysis test in the aeroengine and combustion chamber experiments, the principle and system of gas analysis test were introduced. The computing method for Liquid fuel used was optimized, and the method for gas fuel was developed. The influence of the error about gas component test on the computation result of combusting parameter was analyzed. The effects of mixed sampling means and sampler structure were discussed, and the factors about judging rationality of mixed sampler structure were provided. The measurement results of gas analysis and general testing were compared. Excess air coefficient is better than 5% with reasonable mixed sampler structure and enough measuring points and reasonable gas analysis system. The deviation of combustion efficiency from thermocouple and gas analysis is analyzed.