低旋流预混燃烧稳燃机理的大涡模拟

刘英杰; 刘潇; 周波

doi:10.13224/j.cnki.jasp.2020.02.009

低旋流预混燃烧稳燃机理的大涡模拟

doi: 10.13224/j.cnki.jasp.2020.02.009

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出版历程
- 收稿日期: 2019-07-29
- 刊出日期: 2020-02-28

Large eddy simulation of low swirl premixed flame stabilization mechanism

1.
Aero Engine Academy of China,Aero Engine Corporation of China,Beijing 101304,China
2.
College of Power and Energy Engineering,Harbin Engineering University,Harbin 150001,China
3.
Department of Mechanics and Aerospace Engineering,Southern University of Science and Technology,Shenzhen Guangdong 518055,China

摘要

摘要: 采用大涡模拟(LES)方法对比了高低旋流的预混燃烧特性,并分析了低旋流的稳燃机理。结果表明:LES耦合部分搅拌反应燃烧模型(PaSR)可以准确的捕捉旋流预混燃烧的细小火焰结构和流场分布。不同旋流强度引发不同的流场特性,低旋流诱发较弱的回流区,而高旋流会诱发很强的回流区,这种强烈的流场特征往往会引起振动频率极低的进动涡核拟序结构(PVC)。通过涡脱落和燃烧温度分布的瞬时耦合关系,发现火焰剪切层引起的内外涡脱落频率差是低旋流火焰稳定的最主要因素,低旋流燃烧受涡旋结构的影响交替出现W和V型火焰。
- 大涡模拟 /
- 低旋流 /
- 涡旋 /
- 进动涡核 /
- 火焰稳定
Abstract: The large-eddy simulation (LES) method was used to compare the premixed combustion characteristics of high and low swirls, and the flame stability mechanism of low swirl was analyzed. Results showed that LES coupling with PaSR combustion model can accurately capture the small structures and flow field distribution of premixed flame. The low swirl flow had a weak recirculation zone (sometimes just a low velocity zone), while a high swirl flow produced a strong recirculation zone with a low frequency vibration of the precession vortex core (PVC). By analyzing the change of vortex and flame temperature field, it was found that vortices generated from swirl and center jet flow were the main factors of stability mechanism to stabilize flame in the low velocity region, forming alternating W and V flame.
- large eddy simulation /
- low swirl /
- vortex /
- precession vortex core /
- flame stability

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参考文献(22)

[1]	焦树建.燃气轮机燃烧室［M］.北京:机械工业出版社,1981.
[2]	邓远灏,颜应文,朱嘉伟,等.LPP 低污染燃烧室两相喷雾燃烧数值研究［J］.推进技术,2013,34(3):353-361. DENG Yuanhao,YAN Yingwen,ZHU Jiawei,et al.Numerical study of two-phase spray combustion for lean premixed prevaporized low-emission combustor［J］.Journal of Propulsion Technology,2013,34(3):353-361.(in Chinese)
[3]	刘强,索建秦,梁红侠,等.直混燃烧与 LPP 组合燃烧室数值研究［J］.航空动力学报,2012,27(11):2448-2454. LIU Qiang,SUO Jianqin,LIANG Hongxia,et al.Numerical investigation of combination of direct mixing combustion and LPP combustor［J］.Journal of Aerospace Power,2012,27(11):2448-2454.(in Chinese)
[4]	KIM K T,LEE J G,QUAY B D,et al.Spatially distributed flame transfer functions for predicting combustion dynamics in lean premixed gas turbine combustors［J］.Combustion and Flame,2010,157(9):1718-1730.
[5]	KOMAREK T,POLIFKE W.Impact of swirl fluctuations on the flame response of a perfectly premixed swirl burner［J］.Journal of Engineering for Gas Turbines and Power,2010,132(6):061503.1-061503.7.
[6]	CHAN C K,LAU K S,CHIN W K,et al.Freely propagating open premixed turbulent flames stabilized by swirl［J］.Symposium (International) on Combustion.Elsevier,1992,24(1):511-518.
[7]	JOHNSON M R,LITTLEJONE D,NAZZER W A,et al.A comparison of the flowfields and emissions of high-swirl injectors and low-swirl injectors for lean premixed gas turbines［J］.Proceedings of the Combustion Institute,2005,30(2):2867-2874.
[8]	LITTLEJONE D,CHENG R K.Fuel effects on a low-swirl injector for lean premixed gas turbines［J］.Proceedings of the Combustion Institute,2007,31(2):3155-3162.
[9]	PETERSSON P,WELLANDER R,OLOFSSON J,et al.Simultaneous high-speed PIV and OH PLIF measurements and modal analysis for investigating flame-flow interaction in a low swirl flame［C］∥Proceedings of the 17th International Symposium on Applications of Laser Techniques to Fluid Mechanics.Lisbon,Portugal：Applied Optics,2012:9-12.
[10]	BOHLIN A,NORDSTRM E,CARLSSON H,et al.Pure rotational CARS measurements of temperature and relative O2-concentration in a low swirl turbulent premixed flame［J］.Proceedings of the Combustion Institute,2013,34(2):3629-3636.
[11]	ZHOU B,Li Q,HE Y,et al.Visualization of multi-regime turbulent combustion in swirl-stabilized lean premixed flames［J］.Combustion and Flame,2015,162(7):2954-2958.
[12]	尹航,戴韧,邹玉耐,等.贫预混低旋流燃烧器吹脱极限和流场的测量［J］.燃气轮机技术,2012,25(2):26-31. YIN Hang,DAI Ren,ZOU Yunai,et al.Measurements of blow off limit and flow fields of low swirl lean premixed burners［J］.Gas Turbine Technology,2012,25(2):26-31.(in Chinese)
[13]	尹航,戴韧,张建辉,等.旋流器安装角对低旋流燃烧流场的影响［J］.动力工程学报,2011,31(9):664-671. YIN Hang,DAI Ren,ZHANG Jianhui,et al.Effect of vane setting angle of swirler on flow field of a low-swirl burner［J］.Journal of Chinese Society of Power Engineering,2011,31(9):664-671.(in Chinese)
[14]	柳伟杰,葛冰,田寅申,等.当量比对甲烷预混低旋流燃烧的影响［J］.燃烧科学与技术,2014,20(1):65-69. LIU Weijie,GE Bing,TIAN Yinshen,et al.Effect of equivalence ratio on methane pre-mixed low-swirl combustion［J］.Journal of Combustion Science and Technology,2014,20(1):65-69.(in Chinese)
[15]	WOLF P,BALAKRISHNAN R,STAFFELBACH G,et al.Using LES to study reacting flows and instabilities in annular combustion chambers［J］.Flow,Turbulence and Combustion,2012,88(1/2):191-206.
[16]	JONES W P,MARQUIS A J,VOGIATZAKI K.Large-eddy simulation of spray combustion in a gas turbine combustor［J］.Combustion and Flame,2014,161(1):222-239.
[17]	SUBRAMANIAN V,DOMINGO P,VERVISCH L.Large eddy simulation of forced ignition of an annular bluff-body burner［J］.Combustion and Flame,2010,157(3):579-601.
[18]	CARLSSON H,NORDSTRM E,BOHLIN A,et al.Large eddy simulations and rotational CARS/PIV/PLIF measurements of a lean premixed low swirl stabilized flame［J］.Combustion and Flame,2014,161(10):2539-2551.
[19]	CARLSSON H,CARLSSON C,FUCHS L,et al.Large eddy simulation and extended dynamic mode decomposition of flow-flame interaction in a lean premixed low swirl stabilized flame［J］.Flow,Turbulence and Combustion,2014,93(3):505-519.
[20]	NOGENMYR K J,PETERSSON P,BAI X S,et al.Structure and stabilization mechanism of a stratified premixed low swirl flame［J］.Proceedings of the Combustion Institute,2011,33(1):1567-1574.
[21]	GOLOVITCHEV V I,CHOMIAK J.Evaluation of ignition improvers for methane autoignition［J］.Combustion Science and Technology,1998,135(1/2/3/4/5/6):31-47.
[22]	张宏达,张济民,韩超,等.大涡模拟研究钝体有旋流流场的拟序结构［J］.航空学报,2014,35(7):1854-186. ZHANG Hongda,ZHANG Jimin,HAN Chao,et al.Coherent structures of flow fields in swirling flow around a buff-body using large eddy simulation［J］.Acta Aeronautica et Astronautica Sinica,2014,35(7):1854-1864.(in Chinese)