贫预混燃烧室燃烧稳定性的数值研究

推进技术 ›› 2017, Vol. 38 ›› Issue (11): 2562-2571.

贫预混燃烧室燃烧稳定性的数值研究

杨亚晶,李晓亚,谢伟

西安交通大学航天航空学院机械结构强度与振动国家重点实验室，陕西西安 710049,西安交通大学航天航空学院机械结构强度与振动国家重点实验室，陕西西安 710049,西安交通大学航天航空学院机械结构强度与振动国家重点实验室，陕西西安 710049

发布日期:2021-08-15
作者简介:杨亚晶，女，博士，讲师，研究领域为燃烧不稳定性的机理及控制方法，新型金属燃料冲压发动机的燃烧技术。
基金资助:
国家自然科学基金(11102151)。

Numerical Study on Combustion Stability in a Lean Premixed Combustor

State Key Laboratory for Strength and Vibration of Mechanical Structures，School of Aerospace， Xi’an Jiaotong University，Xi’an 710049，China,State Key Laboratory for Strength and Vibration of Mechanical Structures，School of Aerospace， Xi’an Jiaotong University，Xi’an 710049，China and State Key Laboratory for Strength and Vibration of Mechanical Structures，School of Aerospace， Xi’an Jiaotong University，Xi’an 710049，China

Published:2021-08-15

摘要/Abstract

摘要： 为了深入探究贫预混燃烧中的燃烧不稳定特性并发展有效的控制方法，通过数值模拟的方法，详细分析了当量比、旋流数、预混气初温对燃烧不稳定的影响规律，并尝试把穿孔板背腔用于模型燃烧室燃烧不稳定的控制研究中。研究发现该模型燃烧室的压力振荡为径向自激振荡模式，旋流强度和当量比对贫预混燃烧的稳定性具有重要影响作用，预混气初始温度的不同，对室内的一阶振荡频率和声压级影响不大，穿孔板背腔可以用来抑制燃烧室内的不稳定现象，当穿孔板背腔长度增加到60mm时，室内的声压级降低了19.35%。

关键词: 贫预混燃烧；旋流强度；燃烧不稳定；抑制方法

Abstract: In order to explore the characteristics of combustion instability and develop effective control methods，the combustion instability phenomenon，which happens in lean premixed combustion，was investigated. In the numerical simulation，the effects of equivalent ratio，swirl number，and initial temperature of premixed gas on instability combustion were emphasized，and the perforated liners were used in the control of combustion instability. Research results show that the pressure oscillation mode is radial self-excited oscillation mode in the combustion chamber. The equivalence ratio and swirl intensity have an important influence on the combustion stability. The initial temperature of premixed gas has little effect on the first order oscillation frequency and sound pressure level in the combustion chamber. The perforated liners can be used to suppress the combustion instability，especially，when the length of the perforated plate increased to 60mm，the sound pressure level in the chamber is reduced by 19.35%.

Key words: Lean premixed combustion；Swirl intensity；Combustion instability；Suppression method

杨亚晶,李晓亚,谢伟. 贫预混燃烧室燃烧稳定性的数值研究[J]. 推进技术, 2017, 38(11): 2562-2571.

YANG Ya-jing,LI Xiao-ya,XIE Wei. Numerical Study on Combustion Stability in a Lean Premixed Combustor[J]. Journal of Propulsion Technology, 2017, 38(11): 2562-2571.

参考文献

[1] Cohen J M, Anderson T J. Experimental Investigation of Near-Blowout Instabilities in a Lean Premixed Step Combustor[J]. AIAA Journal, 1996, 31(1): 305-311.
[2] Kendrick D W, Hertzberg J B, Anderson T J, et al. Acoustic Effects of Lean-Premixed Fuel Injectors in a Single Nozzle Rig [R]. AIAA 99-0713.
[3] Anderson T J, Sowa W A, Morford S A, et al. Dynamic Flame Structure in a Low NO_x Premixed Combustor[R]. ASME 98-GT-568.
[4] Lee D S, Anderson T J. Measurements of Fuel/Air-Acoustic Coupling in Lean Premixed Combustion Systems [R]. AIAA 99-0450.
[5] Mongia R, Dibble R, Lovett J. Measurement of Air-Fuel Ratio Fluctuations Caused by Combustor Driven Oscillations [R]. ASME 98-GT-304.
[6] Schadow K C, Gutmark E. Combustion Instability Related to Vortex Shedding in Dump Combustors and Their Passive Control[J]. Progress in Energy and Combustion Science, 1992, 18(2): 117-132.
[7] Lieuwen T, Torres H, Johnson C, et al. A Mechanism of Combustion in Stability in Lean-Premixed Gas Turbine Combustor[J]. Journal of Engineering for Gas and Turbine and Power, 1999, 123(1): 182-189.
[8] Wang S, Yang V, Hsiao G, et al. Large Eddy Simulation of Gas Turbine Swirl Injector Flow Dynamics[J]. Journal of Fluid Mechanics, 2007, 583(9): 99-122.
[9] Lee H J, Lee J G, Quay B, et al. Mechanism of Combustion Instability due to Flame-Vortex Interactions in a Lean Premixed Gas Turbine Combustor[R]. AIAA 2013-3726.
[10] 郭志辉, 王帅, 李磊, 等. 贫燃预混旋流火焰燃烧不稳定性的实验[J]. 航空动力学报, 2009, 24(12): 2367-2642.
[11] 段润泽. 预混火焰热声不稳定性研究[D]. 天津:河北工业大学, 2010.
[12] 佘凯. 低氧预混燃烧的实验研究[D]. 天津:河北工业大学, 2007.
[13] 王恒栋. 热声不稳定的主动控制[D]. 杭州:浙江大学, 2015.
[14] 张昊, 朱民. 热声耦合振荡燃烧的实验研究与分析[J]. 推进技术, 2010, 31(6): 730-744. (ZHANG Hao, ZHU Min. Experimental Study and Analysis of Thermo-Acoustic Instabilities in Natural Gas Premixed Flames[J]. Journal of Propulsion Technology, 2010, 31(6):730-744.)
[15] 巩帆, 黄勇. 钝体后预混火焰稳定机理与钝体尺寸间关系的研究[J]. 推进技术, 2014, 35(11): 1495-1502. (GONG Fan, HUANG Yong. Study on Stabilization Mechanism of Premixed Flame after V-Gutters with Different Sizes[J]. Journal of Propulsion Technology, 2014, 35(11): 1495-1502.)
[16] Broda J C, Seo S, Santoro R J, et al. An Experimental Study of Combustion Dynamics of a Premixed Swirl Injector[J]. Symposium on Combustion, 1998, 27(2):1849-1856.
[17] Huang Y, Yang V. Effect of Swirl on Combustion Dynamics in a Lean-Premixed Swirl-Stabilized Combustors[J]. Proceeding of the Combustion Institute, 2005, 30(2): 1775-1782.
[18] Huang Y. Modeling and Simulation of Combustion Dynamics in Lean-Premixed Swirl-Stabilized Gas-Turbine Engines[D]. Pennsylvania: The Pennsylvania State University, 2003.
[19] Huang Y, Yang V. Dynamics and Stability of Lean-Premixed Swirl-Stabilized Combustion[J]. Progress in Energy and Combustion Science, 2009, 35(4): 293-364.(编辑:史亚红)　　　　　　　　　　　　　*　收稿日期:2016-07-04；修订日期:2016-09-02。基金项目:国家自然科学基金(11102151)。作者简介:杨亚晶,女,博士,讲师,研究领域为燃烧不稳定性的机理及控制方法,新型金属燃料冲压发动机的燃烧技术。 E-mail: yjyang@mail.xjtu.edu.cn