模型预混燃烧室燃烧不稳定性研究

付虓; 郭志辉

模型预混燃烧室燃烧不稳定性研究

付虓,
郭志辉

北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室, 北京 100191

详细信息

作者简介:
付虓（1987- ），男，北京人，博士生，主要从事航空发动机燃烧不稳定性研究.

中图分类号: V231.1
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- 被引次数: 0
出版历程
- 收稿日期: 2013-03-15
- 刊出日期: 2014-05-28

Investigation on combustion instability in model premixed combustor

National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics, School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

摘要

摘要: 针对钝体火焰稳定器结构的模型预混燃烧室的燃烧不稳定性现象进行了实验研究和数值模拟.实验中利用动态压力传感器测量了不同当量比时燃烧室内动态压力的频率和振幅.结果表明：随当量比增加，不稳定性频率从251Hz增加到258Hz.不稳定性振幅与大气压力比值从2.7%增加到6.1%.对燃烧室进行了定常和非定常数值模拟以及声学模态分析，得到了周期性旋涡脱落的频率为260Hz和燃烧室系统的前5阶本征声学模态频率.其中第3阶纵向声学模态频率与实验值基本一致，说明维持不稳定性的机理为钝体火焰稳定器后旋涡的周期性对称脱落和燃烧室系统的第3阶纵向声学模态形成了耦合.
- 预混燃烧 /
- 钝体火焰稳定器 /
- 旋涡脱落 /
- 燃烧不稳定性 /
- 本征声学模态
Abstract: Experiments and numerical simulations were conducted on combustion instability in model premixed combustor with bluff body flame holder.Pressure transducers were used to measure frequency and amplitude of the combustor dynamic pressure at different equivalence ratios. Results show that instability frequency increases from 251Hz to 258Hz with the growing equivalence ratio.The ratio between instability amplitude and atmospheric pressure increases from 2.7% to 6.1%.The periodic vortex shedding frequency of 260Hz was calculated by steady and unsteady numerical simulation. The first five combustor nature acoustic mode frequencies were obtained by acoustic mode analysis.The third longitudinal acoustic mode frequency is near the experiment value.The mechanism is the coupling between symmetric vortex shedding periodicity behind bluff body flame holder and the third longitudinal acoustic mode of the combustor.
- premixed combustion /
- bluff body flame holder /
- vortex shedding /
- combustion instability /
- nature acoustic mode

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参考文献(18)

[1]	Zinn B T, Lieuwen T C.Combustion instability:basic concept[C]//Timothy C L, Yang V.Combustion instabilities in gas turbine engines:operational experience, fundamental mechanisms, and modeling.Arlington, Texas:AIAA, 2005:3-26.
[2]	Portillo J E, Sisco J C, Corless M J, et al.Generalized combustion instability model[R].AIAA-2006-4889, 2006.
[3]	Poinsot T J, Trouve A C, Veynante D P, et al.Vortex-driven acoustically coupled combustion instabilities[J].Journal of Fluid Mechanics, 1987, 177(3):265-292.
[4]	Daniel C, Jeff K, John R, et al.High frequency combustion instabilities with radial V-gutter flameholders[R].AIAA-2009-1176, 2009.
[5]	Yu K H, Trouve A, John W D.Low-frequency pressure oscillations in a model ramjet combustor[J].Journal of Fluid Mechanics, 1991, 232(10):47-72.
[6]	Langhorne P J.Reheat buzz:an acoustically coupled combustion instability:Part 1 experiment[J].Journal of Fluid Mechanics, 1988, 193(7):417-443.
[7]	Bloxsidge G J, Dowling A P, Langhorne P J.Reheat buzz:an acoustically coupled combustion instability:Part 2 theory[J].Journal of Fluid Mechanics, 1988, 193(7):445-473.
[8]	Roux A, Gicquel L Y M, Sommerer Y, et al.Large eddy simulation of mean and oscillating flow in a side-dump ramjet combustor[J].Combustion and Flame, 2008, 152(1/2):154-176.
[9]	Huang Y, Yang V.Bifurcation of flame structure in a lean-premixed swirl-stabilized combustor:transition from stable to unstable flame[J].Combustion and Flame, 2004, 136(3):383-389.
[10]	Selle L, Lartigue G, Poinsot T, et al.Compressible large eddy simulation of turbulent combustion in complex geometry on unstructured meshes[J].Combustion and Flame, 2004, 137(4):489-505.
[11]	Selle L, Benoit L, Poinsot T, et al.Joint use of compressible large-eddy simulation and Helmholtz solvers for the analysis of rotating modes in an industrial swirled burner[J].Combustion and Flame, 2006, 145(1/2):194-205.
[12]	张澄宇, 孙晓峰.加力燃烧室流场形态与振荡燃烧数值模拟[J].航空动力学报, 2010, 25(2):270-277. ZHANG Chengyu, SUN Xiaofeng.Numerical simulation on vortex shedding and combustion oscillation in aero-engine afterburner[J].Journal of Aerospace Power, 2010, 25(2):270-277.(in Chinese)
[13]	张澄宇, 李磊, 孙晓峰.加力燃烧室热声振荡纵向传播特性及控制[J].航空动力学报, 2010, 25(2):278-283. ZHANG Chengyu, LI Lei, SUN Xiaofeng.Thermoacoustic oscillating calculation of longitudinal equivalence frequency and stability in aero-engine afterburner[J].Journal of Aerospace Power, 2010, 25(2):278-283.(in Chinese)
[14]	Nicoud F, Benoit L, Sensiauet C, et al.Acoustic modes in combustors with complex impedances and multidimensional active flames[J].AIAA Journal, 2007, 45(2):426-441.
[15]	Laverdant A M, Poinsot T, Candel S M.Mean temperature field effect on acoustic mode structure in dump combustor[J]. Journal of Propulsion and Power, 1986, 2(4):311-316.
[16]	杜功焕, 朱哲民, 龚秀芬.声学基础[M].南京:南京大学出版社, 2001.
[17]	王治国.MSC.ACTRAN工程声学有限元分析理论与应用[M].北京:国防工业出版社, 2007.
[18]	Martin C E, Benoit L, Sommerer Y, et al.Large-eddy simulation and acoustic analysis of a swirled staged turbulent combustor[J].AIAA Journal, 2006, 44(4):741-750.