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中文摘要: 本文在贫预混燃烧容易诱导热声不稳定产生的背景下，采用大涡模拟结合系统辨识的方法，对甲烷燃料掺氢以及不同火焰筒限制两种情况下的贫预混火焰动力学进行了相关分析。之后通过得出的火焰传递函数，采用低阶网络模型的方法对系统进行了稳定性分析。研究结果表明：加入氢气后，明显增大了火焰的频响，同时火焰相位差减小；在一定的频率范围内，火焰更容易捕捉到不同火焰筒限制对响应的影响；通过采用不同的火焰筒限制，可以修改系统的稳定性行为。
Abstract:Under the background that lean premixed combustion is easy to induce thermoacoustic instability, Large Eddy Simulation combined with System Identification method is used to analyze the dynamics of lean premixed flame in the case of hydrogen mixing of methane fuel and different combustor confinement. Then, the stability of the system is analyzed by the flame transfer function obtained and the method of low-order network model. The results show that the frequency response of the flame increases obviously and the phase difference of the flame decreases with the addition of hydrogen. In a certain frequency range, the influence of different combustor confinement on the response can be easily captured by the flame. The stability behavior of the system can be modified by using different flame tube restrictions.
keywords: system identification flame transfer function low-order network model thermoacoustic instability
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基金项目:
| 作者 | 单位 |
| 王博涵* | 中国科学院工程热物理研究所先进燃气轮机实验室 |
| 孙潇峰 | 青岛海尔日日顺物流有限公司 |
| 姜磊 | 中国科学院工程热物理研究所先进燃气轮机实验室 |
| 胡宏斌 | 中国科学院工程热物理研究所先进燃气轮机实验室 |
| 聂超群 | 中国科学院工程热物理研究所先进燃气轮机实验室 |
引用文本：
作者.题名[J].刊名,出版年份,卷号(期号):起止页码.
[2]KIM K M, PARK J S, DONG H L, et al. Analysis of conjugated heat transfer, stress and failure in a gas turbine blade with circular cooling passages[J]. Engineering Failure Analysis, 2011, 18(4):1212-1222.
作者.题名[J].刊名,出版年份,卷号(期号):起止页码.
[2]KIM K M, PARK J S, DONG H L, et al. Analysis of conjugated heat transfer, stress and failure in a gas turbine blade with circular cooling passages[J]. Engineering Failure Analysis, 2011, 18(4):1212-1222.