进口温度对分层旋流火焰燃烧不稳定性的影响
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摘要
为了研究进口温度对分层旋流火焰燃烧不稳定性的影响,实验在单头部燃烧室上测量了不同进口温度下的动态压力,并采用理论分析了进口温度对压力振荡的影响。实验结果显示:该燃烧室出现的燃烧不稳定性呈现的是Helmholtz模态,并且随着进口温度从530K增加至650K时,压力脉动主频增加,幅值减小。分析表明:进口温度的增加会增强燃油的雾化和蒸发,进而加强其与空气的掺混均匀性,减小了当量比脉动,从而抑制了燃烧不稳定性,压力振荡幅值减小。
In order to investigate the effects of inlet temperature on the combustion instability in stratified swirl combustor,the dynamic pressure under various inlet temperatures was tested using a single doom combustor,and the effects of inlet temperature on pressure oscillation were analyzed using a theory.The experimental results showed that the mode of combustion instability in this combustor was Helmholtz mode.With the increase of inlet temperature from 530 Kto 650 K,the amplitude of pressure oscillation decreased.Analysis showed that the increase of inlet temperature can enhance fuel atomization and evaporation and then strengthen its mixing with air,making equivalence-ratio oscillation less impossible.Therefore combustion instability was less prone to occur and the dynamic pressure amplitude was smaller.
In order to investigate the effects of inlet temperature on the combustion instability in stratified swirl combustor,the dynamic pressure under various inlet temperatures was tested using a single doom combustor,and the effects of inlet temperature on pressure oscillation were analyzed using a theory.The experimental results showed that the mode of combustion instability in this combustor was Helmholtz mode.With the increase of inlet temperature from 530 Kto 650 K,the amplitude of pressure oscillation decreased.Analysis showed that the increase of inlet temperature can enhance fuel atomization and evaporation and then strengthen its mixing with air,making equivalence-ratio oscillation less impossible.Therefore combustion instability was less prone to occur and the dynamic pressure amplitude was smaller.
引文
[1]HUANG Y,YANG V.Dynamics and stability of leanpremixed swirl-stabilized combustion[J].Progress in Energy and Combustion Science,2009,35(4):293-364.
[2]TACHIBANA S,KANAI K,YOSHIDA S,et al.Combined effect of spatial and temporal variations of equivalence ratio on combustion instability in a low-swirl combustor[J].Proceedings of the Combustion Institute,2015,35(3):3299-3308.
[3]秦皓,林宇震,李继保.工况压力对分层火焰系统中压力振荡的影响[J].推进技术,2016,37(10):1882-1892.QIN Hao,LIN Yuzhen,LI Jibao.Effects of operating pressure upon pressure oscillationin stratified flames system[J].Journal of Propulsion Technology,2016,37(10):1882-1892.(in Chinese)
[4]汤冠琼,秦皓,林宇震,等.当量比对分层旋流火焰燃烧不稳定性的影响[J].推进技术,2015(9):1355-1360.TANG Guanqiong,QIN Hao,LIN Yuzhen,et al.Effects of equivalence ratio on combustion instability characteristics of staged swirl flame[J].Journal of Propulsion Technology,2015(9):1355-1360.(in Chinese)
[5]秦皓,丁志磊,李海涛,等.LESS燃烧室非定常旋流流动[J].航空动力学报,2015,30(7):1566-1575.QIN Hao,DING Zhilei,LI Haitao,et al.Unsteady swirling flow in low emissions stirred swirls combustor.[J].Journal of Aerospace Power,2015,30(7):1566-1575.(in Chinese)
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[7]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.
[8]HUANG Y,YANG V.Modelling and control of combustion dynamics in lean premixed swirl stabilized combustors[M].Tokyo:Proceedings of Symposium Smart Control of Turbulence Japan,2005:1-21.
[9]黄勇,林宇震,樊未军,等.燃烧与燃烧室[M].北京:北京航空航天大学出版社,2009.
[10]TEMME J E,ALLISON P,DRISCOLL J.Low frequency combustion instabilities imaged in a gas turbine combustor flame tube[R].AIAA-2012-0542,2012.
[11]TEMME J E,ALLISON P M,DRISCOLL J F.Combustion instability of a lean premixed prevaporized gas turbine combustor studied using phase-averaged PIV[J].Combustion and Flame,2014,161(4):958-970.
[12]FOUST M,THOMSEN D,STICKLES R,et al.Development of the GE aviation low emissions TAPS combustor for next generation aircraft engines[R].AIAA-2012-0936,2012.
[13]YOSHIYAMA S,HAMAMTOT Y,TOMITA E,et al.Measurement of hydrocarbon fuel concentration by means of infrared absorption technique with 3.39μm He-Ne laser[J].JSAE Review,1996,17(4):339-345.
[14]TSUBOI T,INOMATA K,TSUNODA Y,et al.Light absorption by hydrocarbon molecules at 3.392μm of He-Ne laser[J].Japanese Journal of Applied Physics,1985,24(1):8-13.
[15]NGUYEN Q V.Measurements of equivalence ratio fluctuations in a lean premixed prevaporized(LPP)combustor and its correlation to combustion instability[R].ASME Paper GT2002-30060,2002.
[16]LEE J G,KIM K,SANTAVICCA D A.Measurement of equivalence ratio fluctuation and its effect on heat release during unstable combustion[J].Proceedings of the Combustion Institute,2000,28(1):415-421.
[17]RICHARDS G A,JANUS M C.Characterization of oscillations during premix gas turbine combustion[J].Journal of Engineering for Gas Turbines and Power,1998,120(2):294-302.
[18]HAN Xiao,ZHANG Chi,LIN Yuzhen.Combustion instabilities in a lean premixed pre-vaporized combustor at highpressure high-temperature[R].ASME Paper GT2017-65190,2017.
[19]SEO S,LEE S Y.Effects of unmixedness on combustion instabilities in a lean-premixed gas turbine combustor[J].Flow,Turbulence and Combustion,2010,85(1):95-112.
[20]DHANUKA S K,TEMME J E,DRISCOLL J.Unsteady aspects of lean premixed prevaporized gas turbine combustors:flame-flame interactions[J].Journal of Propulsion and Power,2011,27(3):631-641.
[21]MELLOR A M.Design of modern turbine combustors[M].New York:Academic Press,1990.
[2]TACHIBANA S,KANAI K,YOSHIDA S,et al.Combined effect of spatial and temporal variations of equivalence ratio on combustion instability in a low-swirl combustor[J].Proceedings of the Combustion Institute,2015,35(3):3299-3308.
[3]秦皓,林宇震,李继保.工况压力对分层火焰系统中压力振荡的影响[J].推进技术,2016,37(10):1882-1892.QIN Hao,LIN Yuzhen,LI Jibao.Effects of operating pressure upon pressure oscillationin stratified flames system[J].Journal of Propulsion Technology,2016,37(10):1882-1892.(in Chinese)
[4]汤冠琼,秦皓,林宇震,等.当量比对分层旋流火焰燃烧不稳定性的影响[J].推进技术,2015(9):1355-1360.TANG Guanqiong,QIN Hao,LIN Yuzhen,et al.Effects of equivalence ratio on combustion instability characteristics of staged swirl flame[J].Journal of Propulsion Technology,2015(9):1355-1360.(in Chinese)
[5]秦皓,丁志磊,李海涛,等.LESS燃烧室非定常旋流流动[J].航空动力学报,2015,30(7):1566-1575.QIN Hao,DING Zhilei,LI Haitao,et al.Unsteady swirling flow in low emissions stirred swirls combustor.[J].Journal of Aerospace Power,2015,30(7):1566-1575.(in Chinese)
[6]TURNS S R,姚强,李水清,等.燃烧学导论:概念与应用[M].北京:清华大学出版社,2009.
[7]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.
[8]HUANG Y,YANG V.Modelling and control of combustion dynamics in lean premixed swirl stabilized combustors[M].Tokyo:Proceedings of Symposium Smart Control of Turbulence Japan,2005:1-21.
[9]黄勇,林宇震,樊未军,等.燃烧与燃烧室[M].北京:北京航空航天大学出版社,2009.
[10]TEMME J E,ALLISON P,DRISCOLL J.Low frequency combustion instabilities imaged in a gas turbine combustor flame tube[R].AIAA-2012-0542,2012.
[11]TEMME J E,ALLISON P M,DRISCOLL J F.Combustion instability of a lean premixed prevaporized gas turbine combustor studied using phase-averaged PIV[J].Combustion and Flame,2014,161(4):958-970.
[12]FOUST M,THOMSEN D,STICKLES R,et al.Development of the GE aviation low emissions TAPS combustor for next generation aircraft engines[R].AIAA-2012-0936,2012.
[13]YOSHIYAMA S,HAMAMTOT Y,TOMITA E,et al.Measurement of hydrocarbon fuel concentration by means of infrared absorption technique with 3.39μm He-Ne laser[J].JSAE Review,1996,17(4):339-345.
[14]TSUBOI T,INOMATA K,TSUNODA Y,et al.Light absorption by hydrocarbon molecules at 3.392μm of He-Ne laser[J].Japanese Journal of Applied Physics,1985,24(1):8-13.
[15]NGUYEN Q V.Measurements of equivalence ratio fluctuations in a lean premixed prevaporized(LPP)combustor and its correlation to combustion instability[R].ASME Paper GT2002-30060,2002.
[16]LEE J G,KIM K,SANTAVICCA D A.Measurement of equivalence ratio fluctuation and its effect on heat release during unstable combustion[J].Proceedings of the Combustion Institute,2000,28(1):415-421.
[17]RICHARDS G A,JANUS M C.Characterization of oscillations during premix gas turbine combustion[J].Journal of Engineering for Gas Turbines and Power,1998,120(2):294-302.
[18]HAN Xiao,ZHANG Chi,LIN Yuzhen.Combustion instabilities in a lean premixed pre-vaporized combustor at highpressure high-temperature[R].ASME Paper GT2017-65190,2017.
[19]SEO S,LEE S Y.Effects of unmixedness on combustion instabilities in a lean-premixed gas turbine combustor[J].Flow,Turbulence and Combustion,2010,85(1):95-112.
[20]DHANUKA S K,TEMME J E,DRISCOLL J.Unsteady aspects of lean premixed prevaporized gas turbine combustors:flame-flame interactions[J].Journal of Propulsion and Power,2011,27(3):631-641.
[21]MELLOR A M.Design of modern turbine combustors[M].New York:Academic Press,1990.