ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Experimental investigation on characteristics of deflagration to detonation transition in U-bend square tube
Received date: 2014-06-05
Revised date: 2014-08-01
Online published: 2014-11-02
Supported by
National Natural Science Foundation of China (50906072, 51306154); The Fundamental Research Funds for the Central Universities (3102014JCY01003)
For the application of the curved detonation combustor in pulse detonation engine (PDE), in this paper we present the results of experimental investigation on gaseous combustion wave of C2H4/Air mixture propagation through a U-bend square tube. By changing the incident shock wave speed at the entrance of the bend section in U-bend square tube, the characteristics of deflagration to detonation transition (DDT) in bend section have been researched based on the pressures/velocities measure and high speed photography. When the incident shock wave speed is lower than 794 m/s(43.6%VCJ), the detonation cannot form in the bend section; when the speed is between 870 m/s and 908 m/s(47.8%VCJ-50.0%VCJ), the hot spot will be formed firstly and then the detonation will form finally in the bend section; when the speed exceeds 934 m/s(51.3%VCJ), the deflagration wave will directly transit into a detonation at the entrance of bend section.
QIU Hua , WANG Wei , FAN Wei , XIONG Cha . Experimental investigation on characteristics of deflagration to detonation transition in U-bend square tube[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2015 , 36(6) : 1788 -1794 . DOI: 10.7527/S1000-6893.2014.0269
[1] Fan W, Yan C J, Huang X Q, et al. Experimental investigation on two-phase pulse detonation engine[J]. Combustion and Flame, 2003, 133(4): 441-450.
[2] Roy G D, Frolov S M, Borisov A A, et al. Pulse detonation propulsion: challenges, current status, and future perspective[J]. Progress in Energy and Combustion Science, 2004, 30(6): 545-672.
[3] Helfrich T M, Schauer F R. Ignition and detonation-initiation characteristics of hydrogen and hydrocarbon fuels in a PDE[C]//45th AIAA Aerospace Sciences Meeting and Exhibit. Reston: AIAA, 2007.
[4] Austin J M, Shepherd J E. Detonations in hydrocarbon fuel blends[J]. Combustion and Flame, 2003, 132(1-2): 73-90.
[5] Brophy C M, Hanson R K. Fuel distribution effects on pulse detonation engine operation and performance[J]. Journal of Propulsion and Power, 2006, 22(6): 1155-1161.
[6] Wang W, Qiu H, Fan W, et al. Experimental study on spiral pulse detonation engines[J]. Journal of Experiments in Fluid Mechanics, 2012, 26(2): 12-16 (in Chinese). 王玮, 邱华, 范玮, 等. 螺旋式脉冲爆震发动机实验研究[J]. 实验流体力学, 2012, 26(2): 12-16.
[7] Wang C J, Xu S L, Guo C M. Experimental investigation on gaseous detonation propragation through a semi-circle bend tube[J]. Explosion and Shock Waves, 2003, 23(5): 448-453 (in Chinese). 王昌建, 徐胜利, 郭长铭. 气相爆轰波在半圆形弯管中传播现象的实验研究[J]. 爆炸与冲击, 2003, 23(5): 448-453.
[8] Yang Z, Zhou K Y, Xie L J, et al. Experimental study of flame transition in the "Z" type tube[J]. Fire Safety Science, 2006, 15(3): 111-115 (in Chinese). 杨志, 周凯元, 谢立军, 等. Z型管道中气体火焰传播规律的实验研究[J]. 火灾科学, 2006, 15(3): 111-115.
[9] Nakayama H, Moriya T, Kasahara J, et al. Stable detonation wave propagation in rectangular-cross-section curved channels[J]. Combustion and Flame, 2012, 159(2): 859-869.
[10] Nakayama H, Kasahara J, Matsuo A, et al. Front shock behavior of stable curved detonation waves in rectangular-cross-section curved channels[J]. Proceedings of the Combustion Institute, 2013, 34(2): 1939-1947.
[11] Zhou R, Wang J P. Numerical investigation of shock wave reflections near the head ends of rotating detonation engines[J]. Shock Waves, 2013, 23(5): 461-472.
[12] Frolov S M. Liquid-fueled air-breathing pulse detonation engines demonstrator: operation principles and performance[J]. Journal of Propulsion and Power, 2006, 22(6): 1162-1169.
[13] Frolov S M, Aksenov V S, Shamshin I O. Shock wave and detonation propagation through U-bend tubes[J]. Proceedings of the Combustion Institute, 2007, 31(2): 2421-2428.
[14] Frolov S M. Fast deflagration-to-detonation transition[J]. Russian Journal of Physical Chemistry B, 2008, 2(3): 442-455.
[15] Wang W,Qiu H,Fan W,et al. Experimental study on DDT characteristics in spiral configuration pulse detonation engines[J]. International Journal of Turbo & Jet-Engines, 2013, 30(3): 261-270.
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