Numerical study on effect of hot jet ignition on flame acceleration and detonation initiation in detonation tube
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摘要: 为研究热射流点火对爆震管内火焰加速及爆震波触发的影响,运用34步26组分丙烷基元反应进行了二维数值模拟,获得了5种不同的热射流发生器几何结构下的爆震管内火焰传播规律及缓燃向爆震转捩(deflagration to detonation transition,DDT)的时间与距离.结果表明:爆震管中湍流在火焰加速阶段起着重要作用,在爆震波触发阶段激波与火焰相互作用占有主导地位.根据DDT过程的定义,得到DDT时间在1.4~2.0ms之间,同时发现热射流发生器长度为150mm,热射流发生器孔径在8mm时DDT时间最短,热射流发生器长度及孔径对DDT距离的影响不大.Abstract: To study the effect of hot jet ignition on flame acceleration and detonation initiation in detonation tube, 2-D numerical simulations with propane mechanism including 34 reaction steps among 26 chemical species were performed, and the flame propagation law in detonation tube and deflagration to detonation transition (DDT) time and distance were obtained with 5 different configurations of hot jet sub-chamber. The results show that turbulence plays a key role during flame acceleration process in detonation tube, and the shock/flame interaction dominates the detonation initiation. According to the definition of DDT process, the DDT time is between 1.4-2.0ms, and the minimum value is obtained in the hot jet sub-chamber with 150mm length and 8mm in orifice diameter. The hot jet sub-chamber length and orifice diameter exert a minor effect on the DDT distance.
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[1] Dean A J.A review of PDE development for propulsion applications[R].Reno,NV:45th AIAA Aerospace Sciences Meeting and Exhibit,2007. [2] Kaneshige M,Shepherd J E.Detonation database[R].Pasadena,CA:GALCIT Technical Report FM97-8,1997. [3] Ciccarelli G,Dorofeev S.Flame acceleration and transition to detonation in ducts[J].Progress in Energy and Combustion Science,2008,34(4):499-550. [4] Lee J H S.Handbook of shock waves[M].New York:Academic Press,2000. [5] Lee J H S.The detonation phenomenon[M].Cambridge:Cambridge University Press,2008. [6] Urtiew P A,Oppenheim A K.Experimental observations of the transition to detonation in an explosive gas[J].Proceedings of the Royal Society of London:Series A Mathematical and Physical Sciences,1966,295(1440):13-28. [7] Zeldovich Y B,Librovich V B,Makhviladze G M,et al.On the onset of detonation in a nonuniformly heated gas[J].Journal of Applied Mechanics and Technical Physics,1970,11(2):264-270. [8] Shchelkin K I.Initiation of detonation in gases in rough tubes[J].Technical Physics,1947,17(5):613. [9] Sorin R,Zitoun R,Desbordes D.Optimization of the deflagration to detonation transition:reduction of length and time of transition[J].Shock Waves,2006,15(2):137-145. [10] Kuznetsov M S,Matsukov I D,Alekseev V I,et al.Photographic study of unstable turbulent flames in obstructed channels[R].Heidelberg,Germany:17th International Colloquium on the Dynamics of Explosions and Reactive Systems,1999. [11] Johansen C T,Ciccarelli G.Visualization of the unburned gas flow field ahead of an accelerating flame in an obstructed square channel[J].Combustion and Flame,2009,156(2):405-416. [12] Kessler D A,Gamezo V N,Oran E S.Simulations of flame acceleration and deflagration-to-detonation transitions in methane-air systems[J].Combustion and Flame,2010,157(11):2063-2077. [13] Kailasanath K.Review of propulsion applications of detonation waves[J].AIAA Journal,2000,38(9):1698-1708. [14] WANG Ke,FAN Wei,YAN Yu,et al.Operation of a rotary-valved pulse detonation rocket engine utilizing liquid kerosene and oxygen[J].Chinese Journal of Aeronautics,2011,24(6):726-733. [15] 李建中,王家骅,范育新,等.煤油/空气气动阀式脉冲爆震发动机试验[J].航空动力学报,2005,20(5):802-806. LI Jianzhong,WANG Jiahua,FAN Yuxin,et al.Experimental investigation on kerosene/air pneumatic valve pulse detonation engine[J].Journal of Aerospace Power,2005,20(5):802-806.(in Chinese) [16] 张义宁,王家骅,张靖周.多循环吸气式脉冲爆震发动机推力直接测量[J].推进技术,2006,27(5):459-462. ZHANG Yining,WANG Jiahua,ZHANG Jingzhou.Impulse of cyclic air-breathing pulse detonation engine[J].Journal of Propulsion Technology,2006,27(5):459-462.(in Chinese) [17] Shimada H,Kenmoku Y,Sato H.A new ignition system for pulse detonation engine[J].AIAA-2004-308,2004. [18] Lieberman D H,Parkin K L,Shepherd J E.Detonation initiation by a hot turbulent jet for use in pulse detonation engines[J].AIAA-2002-3909,2002. [19] Ishii K,Akiyoshi T,Gonda M,et al.Effects of flame jet configurations on detonation initiation[M].Berline:Springer, 2009:239-244. [20] 于军力,秦亚欣,高歌.射流点火对爆震管中爆燃转爆震影响的实验[J].航空动力学报,2011,26(5):1043-1047. YU Junli,QIN Yaxin,GAO Ge.Experimental investigation on effects of flame jet ignition on deflagration to detonation transition in tube[J].Journal of Aerospace Power,2011,26(5):1043-1047.(in Chinese) [21] Thomas G O,Jones A.Some observations of the jet initiation of detonation[J].Combustion and Flame,2000,120(3):392-398. [22] ZHAO Wei,HAN Qixiang,ZHANG Qi.Experimental investigation on detonation initiation with a transversal flame jet[J].Combustion,Explosion,and Shock Waves,2013,49(3):171-177. [23] Knystautas R,Lee J H S,Moen I,et al.Direct initiation of spherical detonation by a hot turbulent gas jet[J].Symposium (International) on Combustion,1979,17(1):1235-1245. [24] 秦亚欣,于军力,高歌.环形爆震室中火焰加速数值模拟及验证[J].航空动力学报,2011,26(8):1744-1749. QIN Yaxin,YU Junli,GAO Ge.Numerical simulation and experimental study on flame acceleration in annular detonation duct[J].Journal of Aerospace Power,2011,26(8):1744-1749.(in Chinese) [25] Petrova M V,Varatharjan B,Williams F A.Theory of propane autoignition[R].Reno,Nevada:42nd AIAA Aerospace Sciences Meeting and Exhibit,2004. [26] Kuznetsov M,Alekseev V,Yankin Y,et al.Slow and fast deflagrations in hydrocarbon-air mixtures[J].Combustion Science and Technology,2002,174(5/6):157-172. [27] 何小民,张彭岗.缓燃向爆震转捩过程中火焰和压力波发展规律试验[J].航空动力学报,2008,23(11):2036-2042. HE Xiaomin,ZHANG Penggang.Investigation on the mechanism of wave and flame in the deflagration to detonation transition process[J].Journal of Aerospace Power,2008,23(11):2036-2042.(in Chinese)
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