中心分级燃烧室变频变能点火性能试验
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摘要
对中心分级燃烧室常温常压下变频变能点火性能进行了试验研究,点火能量为1～15J,点火频率为1～15Hz,燃烧室压降1.5%。结果表明:随着点火能量增大,贫油点火余气系数先迅速增大后缓慢增大,点火延迟时间先急剧缩短后缓慢缩短,随点火频率增大,贫油点火余气系数缓慢增大,点火延迟时间先迅速缩短后缓慢缩短,点火能量较低时该规律更为显著;当点火功率大于35W时提高点火功率对提高点火性能意义不大,点火能量对点火性能的影响较点火频率更为显著,相同功率下提高点火能量对点火更有利;基于Lefebvre、王延胜等人的点火模型,拟合了中心分级燃烧室关于燃烧室参考速度、索太尔平均直径、点火能量和点火频率的点火模型,模型预测误差在±10%以内。
At ambient temperature and pressure,the ignition performance of the internally-staged combustor under different ignition energy and ignition frequency combinations was experimentally investigated.The ignition energy values ranged from 1 Jto 15 J,the ignition frequency values ranged from 1 Hz to 15 Hz,and air pressure drop remained at 1.5%.The experimental results indicated that,as the ignition energy increased,the excess air coefficient of lean ignition increased rapidly at first and then increased slowly,while the ignition delay time was shortened sharply and then slowly.As the ignition frequency increased,the excess air coefficient of lean ignition increased slowly,and the ignition delay time was shortened rapidly and then slowly,this regularity was more pronounced at lower ignition energy.When the ignition power was greater than 35 W,increasing the ignition power had little significance to improve the ignition performance,and the ignition energy had more significant effect on ignition performance than ignition frequency;under the same ignition power,it was better to raise the ignition energy to improve the ignition performance.A model of ignition based on Lefebvre's and WANG Yansheng's ignition models was obtained by combustor reference velocity,Sauter mean diameter,ignition energy and ignition frequency,and the prediction error of the model was controlled within±10%.
At ambient temperature and pressure,the ignition performance of the internally-staged combustor under different ignition energy and ignition frequency combinations was experimentally investigated.The ignition energy values ranged from 1 Jto 15 J,the ignition frequency values ranged from 1 Hz to 15 Hz,and air pressure drop remained at 1.5%.The experimental results indicated that,as the ignition energy increased,the excess air coefficient of lean ignition increased rapidly at first and then increased slowly,while the ignition delay time was shortened sharply and then slowly.As the ignition frequency increased,the excess air coefficient of lean ignition increased slowly,and the ignition delay time was shortened rapidly and then slowly,this regularity was more pronounced at lower ignition energy.When the ignition power was greater than 35 W,increasing the ignition power had little significance to improve the ignition performance,and the ignition energy had more significant effect on ignition performance than ignition frequency;under the same ignition power,it was better to raise the ignition energy to improve the ignition performance.A model of ignition based on Lefebvre's and WANG Yansheng's ignition models was obtained by combustor reference velocity,Sauter mean diameter,ignition energy and ignition frequency,and the prediction error of the model was controlled within±10%.
引文
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[16]陈魁.实验设计与分析[M].北京:清华大学出版社,2005.
[17]李从心.发动机燃用低热值气体燃料燃烧性能研究[D].北京:北京交通大学,2010.LI Congxin.The research on the combustion characteristics of the engine fueled with LHV gas[D].Beijing:Beijing Jiaotong University,2010.(in Chinese)
[18]《中国航空材料手册》编辑委员会.中国航空材料手册:第10卷燃料与润滑材料纺织材料[M].第2版.北京:中国标准出版社,2001.
[2]SCHWEITZER J K.Propulsion technology readiness for next generation transport systems[R].AIAA-2003-2787,2003.
[3]金如山,索建秦.先进燃气轮机燃烧室[M].北京:航空工业出版社,2016.
[4]颜应文,党龙飞,邓远灏,等.LPP低污染燃烧室单头部燃烧性能试验[J].航空动力学报,2015,30(4):814-822.YAN Yingwen,DANG Longfei,DENG Yuanhao,et al.Experiment of combustion performance in LPP low emission combustor with single dome[J].Journal of Aerospace Power,2015,30(4):814-822.(in Chinese)
[5]邓远灏,顔应文,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)
[6]房人麟,邱伟,邓远灏,等.双级旋流多点喷射燃烧室试验研究[J].推进技术,2016,37(7):1720-1726.FANG Renlin,QIU Wei,DENG Yuanhao,et al.Experimental investigation of twin annular muti-point direct injection mixing combustor[J].Journal of Propulsion Technology,2016,37(7):1720-1726.(in Chinese)
[7]林宇震,林培华,许全宏,等.复合式收扩套筒空气雾化喷嘴燃烧室点火研究[J].航空动力学报,2007,22(3):342-346.LIN Yuzhen,LIN Peihua,XU Quanhong,et al.Research on ignition performance of a hybrid airblast atomizer combustor with convergent divergent sleeve[J].Journal of Aerospace Power,2007,22(3):342-346.(in Chinese)
[8]王延胜,林宇震,李林,等.中心分级燃烧室点火性能试验研究[J].推进技术,2016,37(1):98-104.WANG Yansheng,LIN Yuzhen,LI Lin,et al.Experimental investigation on ignition performance of internallystaged combustor[J].Journal of Propulsion Technology,2016,37(1):98-104.(in Chinese)
[9]付镇柏,林宇震,傅奇慧,等.不同台阶高度对中心分级燃烧室点火熄火性能的影响[J].航空动力学报,2014,29(5):1062-1070.FU Zhenbo,LIN Yuzhen,FU Qihui,et al.Effect of different step heights on ignition and blowout performance of internally-staged combustor[J].Journal of Aerospace Power,2014,29(5):1062-1070.(in Chinese)
[10]FU Zhenbo,LIN Yuzhen.Experimental investigation on ignition performance of LESS combustor[R].ASME Paper GT2011-45786,2011.(in Chinese)
[11]薛鑫,林宇震,张弛,等.火焰筒压力损失对点火特性的影响[J].航空动力学报,2012,27(10):2229-2235.XUE Xin,LIN Yuzhen,ZHANG Chi,et al.Effects of liner pressure loss on combustor ignition performances[J].Journal of Aerospace Power,2012,27(10):2229-2235.(in Chinese)
[12]林宇震,许全宏,刘高恩.燃气轮机燃烧室[M].北京:国防工业出版社,2008.
[13]LEFEBVRE A H,BALLAL D R.Gas turbine combustion alternative fuels and emissions[M].3rd ed.New York:Taylor and Francis Group,2010.
[14]房人麟.一种富油直混分区燃烧室:201320809412.0[P].2014-08-06.
[15]乔屹,赵军,张涛,等.点火系统不同储能下点火频率稳定性研究[J].机械工程与自动化,2016(3):169-170,172.QIAO Yi,ZHAO Jun,ZHANG Tao,et al.Ignition frequency stability of ignition system with different stored energy[J].Mechanical Engineering and Automation,2016(3):169-170,172.(in Chinese)
[16]陈魁.实验设计与分析[M].北京:清华大学出版社,2005.
[17]李从心.发动机燃用低热值气体燃料燃烧性能研究[D].北京:北京交通大学,2010.LI Congxin.The research on the combustion characteristics of the engine fueled with LHV gas[D].Beijing:Beijing Jiaotong University,2010.(in Chinese)
[18]《中国航空材料手册》编辑委员会.中国航空材料手册:第10卷燃料与润滑材料纺织材料[M].第2版.北京:中国标准出版社,2001.