爆震管内波与火焰相互作用机理的试验

张彭岗; 何小民; 李建中; 张靖周

爆震管内波与火焰相互作用机理的试验

南京航空航天大学能源与动力学院, 南京210016

基金项目: 国家自然科学基金项目(50506012)

计量
- 文章访问数: 1344
- HTML浏览量: 0
- PDF量: 476
- 被引次数: 0
出版历程
- 收稿日期: 2006-10-20
- 修回日期: 2007-04-09
- 刊出日期: 2007-10-28

Experimental study on mechanism of shock-flame interactions in detonation tubes

College of Energy and Power Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China

摘要

摘要: 为了解波与火焰相互作用的机理,在60 mm×60 mm×2000 mm方爆震管内,用乙炔(C₂H₂)和空气混合物进行了单爆震性能研究.利用压力传感器与离子探针同时测得爆震管内的压力和火焰传播速度.根据波和火焰触发的不同时刻来分析爆震管内波与火焰相互作用的过程.结果表明:光滑爆震管内没有产生爆震波,压力波始终在火焰前面;加入阻塞比为0.4的扰流器后,爆震管内产生了爆震波.在扰流器内部,爆震波比较复杂,弱压缩波在火焰前面,但火焰在激波前面;在扰流器出口位置以后,激波在火焰前面.
- 航空、航天推进系统 /
- 燃烧 /
- 爆震 /
- 波与火焰 /
- 试验研究
Abstract: A series of single detonation experiments were conducted to study the performance of acetylene-air mixtures in square detonation tube.The ion-probes and pressure transducers were utilized to measure the flame velocity and pressure in the tube, respectively.The process of shock-flame interactions was analyzed through different triggering times between ion-probes and pressure transducers.The results indicate that the compression wave occurs always in front of flame without detonation in the smooth tube.With introduction of detonation tube of BR=0.4, detonation occurs in the tube;the flame is in front of shock within the obstacle section, or reversely outside of obstacle section.
- aerospace propulsion system /
- combustion /
- detonation /
- wave and flame /
- experimental study

HTML

参考文献(12)

[1]	Urtiew P A,Oppenheim A K.Experimental observations of the transition to detonation in an explosive gas[J].Proceedings of Royal Society,1966:13-28.
[2]	Smirnov N N,Nikitin V F,Boichenko A P.Deflagration to detonation transition in gases and its application to pulsed detonation devices[M].Moscow:ENAS Publishers,1999:65-94.
[3]	Lee S Y,Conrad C,Watts J,et al.Deflagration to detonation transition study using simultaneous schlieren and OH PLlF images[R].AlAA 2000-3217.
[4]	Khokhlov A M,Oran E S,Thomas G O.Numerical simulation of deflagration to detonation transition:the role of shock-flame interactions in turbulent flames[J].Combustion and Flame,1999,117:323-339.
[5]	Khokhlov A M,Oran E S.Numerical simulation of detonation initiation in a flame brush:the role of hot spots[J].Combustion and Flame,1999,119:400-416.
[6]	Gamezo V N,Khokhlov A M,Oran E S.The influence of shock bifurcations on shock-flame interactions and DDT[J].Combustion and Flame 2001,126:1810-1826.
[7]	韩启祥,王家骅,王维来.测量爆燃到爆震转捩距离的离子探针技术研究[J].航空动力学报,2003,18(1):97-100.HAN QiXiang,WANG Jiahua,WANG Weilai.Investigation of the lon-probe technology for measuring the DDT distance[J].Journal of Aerospace power,2003,18(1):97-100.
[8]	Smirnov N N,Tyurnikov M V.Experimental investigation of deflagration to detonation transition in hydrocarbon-air gaseous mixtures[J].Combustion and Flame 1995,100:661-668.
[9]	何小民,张彭岗,王家骅.爆震管内爆燃到爆震转捩过程的实验研究[J].推进技术,2005,26(3):252-255.HE Xiaomin,ZHANG Penggang,WANG Jiahua.Experimental investigation of deflagration to detonation transition in two-phase mixture combustion[J].Journal of Propulsion Technology,2005,26(3):252-255.
[10]	Lindstedt R P,Michels H J.Deflagration to detonation transition in mixtures of alkane LNG/LPG constituents with O2/N2[J].Combustion and Flame,1988,72:63-72.
[11]	Lee J H S,Mosn T.The mechanism of transition from deflagration to detonation in vapor cloud explosions[J].Progress in Energy and Combustion Scince,1980:359-389.
[12]	Oran E S,Gamezo V N,Khokhlov A M.Effects of boundary layers and wakes on shock flame interactions and DDT[R].AIAA 2002-0766.