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通过中压全尺寸燃气轮机燃烧室测试平台的合成气燃烧试验,对单喷嘴和多喷嘴燃烧室的动态特性进行了比较分析。在本文的测试工况下,燃烧室没有产生强烈的热声振荡,所有的燃烧过程都很稳定,说明喷嘴的设计是合理的。多喷嘴燃烧室在相似工况下动态压力幅值比单喷嘴燃烧室要小一半以上,功率谱曲线相对平滑,说明多喷嘴燃烧室确实能降低燃烧噪声。单喷嘴和多喷嘴燃烧室在某些工况下都出现了低于10 Hz的极低频压力振荡,且振荡功率相对较大,可能会产生较大的危害,需要进一步研究其产生的机理和抑制方法。本文的研究结果为高氢燃气轮机的设计和改造提供了参考。
The dynamic characteristics of single-nozzle and multi-nozzle combustor were compared by the syngas combustion test of the full-scale gas turbine combustor test platform. Under the test conditions of this paper, the combustion chamber did not generate strong thermoacoustic oscillations, and all the combustion processes were stable, which showed that the nozzle design was reasonable. The dynamic pressure amplitude of multi-nozzle combustor is smaller than that of single-nozzle combustor under similar conditions, and the power spectrum curve is relatively smooth, which shows that multi-nozzle combustor can reduce the combustion noise effectively. Single-nozzle and multi-nozzle combustors have extremely low-frequency pressure oscillations of less than 10 Hz in some operating conditions and the oscillating power is relatively large, which may cause great harm. Therefore, further research on the mechanism of its generation and suppression is needed method. The results of this paper provide a reference for the design and modification of high-hydrogen gas turbine.