单扇区、扇形、全环燃烧室热声不稳定性试验和模拟研究

高贤智; 何沛; 冯晓星; 邓向阳; 蒋晶晶

doi:10.13224/j.cnki.jasp.20200482

单扇区、扇形、全环燃烧室热声不稳定性试验和模拟研究

doi: 10.13224/j.cnki.jasp.20200482

中国航空发动机集团有限公司商用航空发动机有限责任公司, 上海 200241

详细信息

作者简介:
高贤智(1988-),男,工程师,硕士,主要从事燃烧不稳定性研究。

中图分类号: V231.2
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- 文章访问数: 107
- HTML浏览量: 6
- PDF量: 177
- 被引次数: 0
出版历程
- 收稿日期: 2020-11-12
- 刊出日期: 2021-08-28

Experimental and numerical investigation of thermo-acoustic instability in single-sector, sector and full annular combustors

Commercial Aircraft Engine Company Limited, Aero Engine Corporation of China, Shanghai 200241, China

摘要

摘要: 贫油分级燃烧室在单扇区、扇形、全环燃烧室试验台上均会发生自激周期性燃烧不稳定现象，但振荡模态和频率存在差异。为研究这一差异并建立三者之间的联系，同时验证热声不稳定性模拟方法，对三种试验台的燃烧不稳定性进行了试验和数值模拟研究，获得了不同试验台的振荡特性，并对数值模拟和试验结果进行了对比。结果表明：全环燃烧室存在两个失稳模态，扇形燃烧室只存在一个失稳模态，单扇区燃烧室也只存在一个失稳模态；单扇区、扇形燃烧室可以反映全环燃烧室中其中一个失稳模态，而无法反映全环燃烧室的另外一个失稳模态；三维有限元热声模拟方法准确预测了三种不同试验台的燃烧稳定性，预测的无量纲失稳频率与试验结果一致，误差在2%以内。
- 燃烧不稳定 /
- 热声振荡 /
- 失稳频率 /
- 全环燃烧室 /
- 扇形燃烧室
Abstract: Self-excited periodic combustion instabilities in a staged lean burn combustor could be generated by operating the combustor at single-sector,sector and full annular combustor test rigs,but differences existed in oscillation modes and frequencies.In order to investigate the differences and establish the relationship among them, and to verify the thermo-acoustic instability simulation method, experiments and numerical simulations of combustion instabilities were carried out on these three kinds of test rigs, the oscillation characteristics of different test rigs were obtained, and the results were compared between simulations and experiments. The results showed that there were two unstable modes in full annular combustor, while only one unstable mode existed in sector combustor and single-sector combustor.The single-sector and sector com-bustors can represent one of the unstable modes in full annular combustor,but cannot represent another unstable mode. The three-dimensional finite element method thermo-acoustic simulation method accurately predicted the combustion instabilities of these three different kinds of test rigs, and the predicted dimensionless unstable frequencies were consistent with the experimental results with an error within 2%.
- combustion instability /
- thermo-acoustic oscillation /
- unstable frequency /
- full annular combustor /
- sector combustor

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参考文献(23)

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