Abstract
The characteristics and stages of the deflagration-to-detonation transition (DDT) in isopropyl nitrate (IPN) mist/air mixtures are studied and analyzed. A self-sustained detonation wave forms, as is observed from the existence of a transverse wave and a spinning wave structure. The run-up distance of the DDT process and the pitch size of the self-sustained spinning detonation wave in IPN/air mixtures are analyzed. Moreover, a retonation wave forms during the DDT process. Two propagation modes, the high-speed deflagration mode and the self-sustained detonation mode, of the shock-reaction complex (SRC) in IPN mist/air mixtures are found and analyzed. The influence of the mist concentration on the SRC propagation mechanism is studied. The minimum and the optimum IPN mist concentrations for DDT occurrence in IPN mist/air mixtures are determined. The propagation velocity and overpressure of the self-sustained detonation wave in IPN mist/air mixtures are measured and calculated.
Similar content being viewed by others
References
G. D. Roy, S. M. Frolov, A. A. Borisov, and D. W. Netzer, “Pulse detonation propulsion: challenges, current status, and future perspective,” Prog. Energy Combust. Sci., 30, 545–672 (2004).
C. M. Brophy, D. W. Netzer, J. Sinibaldi, and R. Johnson, “Detonation of a JP-10 aerosol for pulsed detonation applications,” in: G. Roy, S. Frolov, D. Netzer, and A. Borisov (eds.), High-Speed Deflagration and Detonation: Fundamentals and Control [in Russian], Elex-KM, Moscow (2001), pp. 207–222.
D. I. Baklanov, L. G. Gvozdeva, and N. B. Scherbak, “Detonations of hydrocarbon-air mixtures in a pulse detonation chamber,” in: G. Roy, S. Frolov, R. Santoro, and S. Tsyganov (eds.), Advances in Confined Detonations [in Russian], Torus Press, Moscow (2002), pp. 225–230.
S. M. Frolov, V. Ya. Basevich, V. S. Aksenov, and S. A. Polikhov, “Initiation of confined spray detonation by electric discharges,” in: G. D. Roy, S. M. Frolov, R. Santoro, and S. Tsyganov (eds.), Confined Detonations and Pulse Detonation Engines [in Russian], Torus Press, Moscow (2003), pp. 157–174.
S. M. Frolov, V. Ya. Basevich, V. S. Aksenov,and S. A. Polikhov, “Initiation of spray detonation by successive triggering of electric discharges,” in: G. Roy, S. Frolov, R. Santoro, and S. Tsyganov (eds.), Advances in Confined Detonations [in Russian], Torus Press, Moscow (2002), pp. 150–157.
Q. M. Liu, X. D. Li, and C. H. Bai, “Deflagration to detonation in aluminum dust-air mixture under weak ignition condition,” Combust. Flame, 156, 914–921 (2009).
Q. M. Liu, C. H. Bai, L. Jiang, and W. X. Dai, “Deflagration-to-detonation transition in nitromethane mist/aluminum dust/air mixtures,” Combust. Flame, 157, 106–117 (2010).
A. A. Borisov, B. E. Gelfand, E. I. Timofeev, S. A. Tsyganov, and S. V. Khomik, “Self-ignition of atomized liquid fuel in gaseous medium,” in: J. R. Bowen, N. Manson, A. K. Oppenheim, and R. I. Soloukhin (eds.), Progress in Astronautics and Aeronautics, Vol. 88: Flames, Lasers, and Reactive Systems (1983), pp. 239–251.
A. A. Borisov, A. E. Mailkov, S. I. Sumskoi, et al., “Comparison of impulse generated by gaseous detonations and shock waves supported by heterogeneous reactions,” in: G. Roy, S. Frolov, R. Santoro, and S. Tsyganov (eds.), Advances in Confined Detonations [in Russian], Torus Press, Moscow (2002), pp. 158–160.
S. M. Frolov and V. Ya. Basevich, “Spray detonation ignition by controlled trigger of electric dischargers,” J. Propuls. Power, 21, 54–64 (2005).
S. M. Frolov, V. Ya. Basevich, V. S. Aksenov, and S. A. Polikhov, “Optimization study of spray detonation initiation electric discharges,” Shock Waves, 14, 175–186 (2005).
N. N. Smirnov, V. F. Nikitin, J. Khadem, and Sh. Alyari-Shourekhdeli, “Onset of detonation in polydispersed fuel-air mixtures,” in: Proc. Combust. Inst., 31, 2195–2204 (2007).
Q. M. Liu, C. H. Bai, X. D. Li, L. Jiang, and W. X. Dai, “Coal dust explosions in a large-scale tubes,” Fuel, 89, 329–335 (2010).
N. N. Smirnov and M. V. Tyurnikov, “A study of deflagration and detonation in multiphase hydrocarbon-air mixtures,” Combust. Flame, 96, 130–140 (1994).
N. N. Smirnov, N. I. Zverev, and M. V. Tyurnikov, “Two-phase flow behind a shock wave with phase transition and chemical reactions,” Int. J. Experim. Thermal Fluid Sci., 13, 11–20 (1996).
Author information
Authors and Affiliations
Corresponding author
Additional information
__________
Translated from Fizika Goreniya i Vzryva, Vol. 47, No. 4, pp. 82–91, July–August, 2011.
Rights and permissions
About this article
Cite this article
Liu, Q., Bai, C., Dai, W. et al. Deflagration-to-detonation transition in isopropyl nitrate mist/air mixtures. Combust Explos Shock Waves 47, 448–456 (2011). https://doi.org/10.1134/S0010508211040083
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0010508211040083