基于高速摄影图像处理统计分析的点火过程试验

蔡尊; 王振国; 孙明波; 汪洪波; 梁剑寒

doi:10.13224/j.cnki.jasp.2016.05.011

基于高速摄影图像处理统计分析的点火过程试验

doi: 10.13224/j.cnki.jasp.2016.05.011

国防科学技术大学航天科学与工程学院高超声速冲压发动机技术重点实验室, 长沙 410073

基金项目:

国家自然科学基金(91016028)

详细信息

作者简介:
蔡尊(1989-),男,黑龙江哈尔滨人,博士生,研究领域为航空宇航推进理论与工程高超声速推进技术.

中图分类号: V235.213
计量
- 文章访问数: 1089
- HTML浏览量: 6
- PDF量: 657
- 被引次数: 0
出版历程
- 收稿日期: 2014-09-04
- 刊出日期: 2016-05-28

Experiment of ignition process based on statistical analysis of image processing

Science and Technology on Scramjet Laboratory, College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China

摘要

摘要: 针对空气来流马赫数为2.1、总温为846K,总压为0.7MPa的条件下凹腔内的强迫点火过程,利用高速摄影观测了凹腔主动喷注方式的乙烯强迫点火试验.基于高速摄影图像的合成分析和概率统计,提出了能够定量分析出点火过程凹腔火焰稳定和燃烧室火焰分布的试验研究方法;利用该研究方法,采用主动喷注方式在全局当量比为0.15和0.17(相应的主动喷注当量比分别为0.04和0.06)的条件下,对比研究了采用凹腔后壁面喷注的喷注方案和采用凹腔前壁喷注和后壁面喷注相结合的喷注方案的点火试验过程;定量分析了这两种喷注方案点火后的凹腔火焰稳定和燃烧室内的火焰分布.当凹腔主动喷注当量比为0.04时,点火凹腔内并没有形成良好的局部压力反馈,火焰在点火凹腔内常以不连续形式稳定存在.当主动喷注当量比达到0.06时,整个燃烧室的火焰分布要更加均匀.针对超声速来流条件下的点火过程瞬态图像,该方法能够有效地开展定性分析和定量研究.
- 点火 /
- 火焰稳定 /
- 图像灰度 /
- 合成图像 /
- 概率统计
Abstract: As for the ignition process at the inflow conditions of Mach 2.1 with stagnation temperature of 846K and pressure of 0.7MPa high speed photography was used to observe the ethylene ignition experiments with the active cavity injection. Based on the high speed photography image synthesis and statistical analysis, a new method for analyzing the cavity flame stabilization and the flame distribution quantitatively was proposed. At the overall equivalent ratio of 0.15 and 0.17(the active injection equivalent ratio of 0.04 and 0.06 correspondingly), the ignition process of the scheme using ramp injection and the scheme using a combined parallel and ramp injection were compared by applying this method. Besides, the cavity flame stabilization and the flame distribution of the ignition schemes were investigated in quantitatively. At the active equivalent ratio of 0.04, the local pressure feedback is weak and the flame exists in a discontinuous form. At the active equivalent ratio of 0.06, the flame distribution of the combustor is more even. As for the ignition process transient images in a supersonic flow, qualitative and quantitative analysis could be made effectively by using this method.
- ignition /
- flame stabilization /
- image grayscale /
- synthetic image /
- probability statistics

HTML

参考文献(22)

[1]	Mastorakos E.Ignition of turbulent non-premixed flame[J].Progress in Energy and Combustion Science,2009,35(1):57-97.
[2]	李大鹏,潘余,吴继平.几何可调喉道双模态冲压发动机点火过程试验研究[J].弹箭与制导学报,2006,26(4):210-217. LI Dapeng,PAN Yu,WU Jiping.Ignition experimental study of a variable geometrical throat dual-mode ramjet[J].Journal of Projectiles,Rockets,Missiles and Fuidance,2006,26(4):210-217.(in Chinese)
[3]	Neophytou A,Richardson E S,Mastroakos E.Spark ignition of turbulent recirculating non-premixed gas and spray flames:a model for predicting ignition probability[J].Combustion and Flame,2012,159(4):1503-1522.
[4]	Aggarwal S K.A review of spray ignition phenomena:present status and future research[J].Progress in Energy and Combustor Science,1998,24(6):565-600.
[5]	Whitehurst R B,Krauss R H,McDaniel J C.Parametric and time resolved studies of autoignition and flame holding in a clean air supersonic combustor[R].AIAA-92-3424,1992.
[6]	李庆.基于凹腔火焰稳定器的亚燃冲压发动机燃烧室点火过程研究[D].长沙:国防科学技术大学,2010 LI Qing.Research on the ignition process of cavity-based flameholder in ramjet combustor[D].Changsha:National University of Defense Technology,2010.(in Chinese)
[7]	Yang V,Li J,Choi J Y,et al.Ignition transient in an ethylene fueled scramjet engine with air throttling[R].AIAA 2010-410,2010.
[8]	Yu K,Wilson K J,Smith R A,et al.Experimental investigation on dual-purpose cavity in supersonic reacting flows[R].AIAA 1998-723,1998.
[9]	Owens M G,Tehranian S,Segal C,et al.Flame-holding configurations for kerosene combustion in a Mach 1.8 airflow[J].Journal of Propulsion and Power,1998,14(4):456-461.
[10]	Kobayashi K,Tomiokat S,Mitani T.Supersonic flow ignition by plasma torch and H₂/O₂ torch[J].Journal of Propulsion and Power,2004,20(2):294-301.
[11]	宋文艳,刘伟雄,贺伟.超声速燃烧室等离子体点火实验研究[J].实验流体力学,2006,20(4):20-24 SONG Wenyan,LIU Weixiong,HE Wei.Experimental investigation of plasma ignition in supersonic combustor[J].Journal of Experiments in Fluid Mechanics,2006,20(4):20-24.(in Chinese)
[12]	Lewis B,Elbe G.Combustion,flames and explosions of gases.[M].London:Harcourt Brace Jovanovich Publishers,1987.
[13]	席文雄.超声速气流中的点火启动及其强化机理研究[D].长沙:国防科学技术大学,2013. XI Wenxiong.Investigation on initiation of ignition and mechanism for enhancement in supersonic flowfield[D].Changsha:National University of Defense Technology,2013.(in Chinese)
[14]	Gruber M R,Donbar J M,Carter C D,et al.Mixing and combustion studies using cavity-based flameholders in a supersonic reacting flows[J].Journal of Propulsion and Power,2004,20(5):769-779.
[15]	Rasmussen C C,Driscoll J F,Carter C D,et al.Characteristics of cavity stabilized flames in a supersonic flow[J].Journal of Propulsion and Power,2005,21(4):765-769.
[16]	Rasmussen C C,Driscoll J F,Hsu K Y.Stability limits of cavity-stabilized flames in supersonic flow[J].Proceedings of the Combustion Institute,2005,30(2):2825-2834.
[17]	Mohamed M C,Kurian J.Cavity-based injections into supersonic flow[J].Journal of Propulsion and Power,2005,21(6):1130-1132.
[18]	Mathur T,Gruber M R,Jackson K.Supersonic combustion experiments with a cavity-based fuel injector[J].Journal of Propulsion and Power,2001,17(6):1305-1312.
[19]	O'Byrne S,Stotz I,Neely A J,et al.OH PLIF imaging of supersonic combustion using cavity injection[R].AIAA 2005-3357,2005
[20]	Sick V.High speed imaging in fundamental and applied combustion research[J].Proceedings of the Combustion Institute,2013,34(2):3509-3530.
[21]	Schmit R F,Semmelmayer L F,Haverkamp L M,et al.Fourier analysis of high speed shadowgraph images around a Mach 1.5 cavity flow field[R].AIAA 2011-3961,2011.
[22]	Sun M B,Gong C,Zhang S P,et al.Spark ignition process in a scramjet combustor fueled by hydrogen and equipped with multi-cavities at Mach 4 flight condition[J].Experimental Thermal and Fluid Science,2012,43(11):90-96.