Abstract
The investigation of detonation initiated by the passage of a high speed body is presented. The following experiments are carried out for mixture of C2H2 + 2.5 O2 passed by a hemispherical or blunt cylinder with velocity ranging from 800 to 1400 m/s. A new mechanism of the transformation of shock waves to detonation waves is observed at near-critical regimes. The analytical correlation between the aerodynamical characteristics of high speed body and the physico-chemical parameters of explosive mixture is proposed as the initiation criterion of gaseous detonation. Analytical and experimental data agree well with each other.
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Alpert RL, Toong T (1972) Periodicity in exothermic hypersonic flows about projectiles. Astr Acta 4–5:539
Behrens H, Struth W, Wecken W (1965) Studies of hypervelocity firings into mixtures of hydrogen with air or with oxygen. In: 10th Symp. (Intl.) on Comb. pp 245–252
Benedick WB, Guirao CM, Knystautas R, Lee JH (1985) Critical charge for the direct initiation of detonation in gaseous fuel-air mixtures. In: Progress in astronautics and aeronautics — dynamics of explosions 106. New York, pp 181–202
Chernyavsky SY, Baulin NN, Mkrtumov AS (1973) Flow around high-velocity blunt bodies by hydrogen-oxygen mixture. Combustion, Explosion and Shock Waves 6:786 (in Russian)
Chernyi GG (1959) Gas flow with high supersonic velocity. Phys Math State Publisher, Moscow (in Russian)
Chernyi GG, Chernyavsky SY (1973) High-velocity motion of blunt bodies in the hydrogen-oxygen mixture. Rep of academy of Sciences USSR 212:2,316 (in Russian)
Chernyi GG, Chernyavsky SY, Baulin NN (1986) High-velocity motion of the bodies in the hydrogen-air mixture. Rep of Academy of Sciences USSR 290:1,44 (in Russian)
Fujiwara T, Matsuo A (1989) Oxyhydrogen oblique detonation supported by two-dimensional wedge. In: 11th Intl Symp on Comb Processes. Poland
Gilinsky SN, Chernyi GG (1968) Supersonic sphere flow around by gas mixture with account of ignition delay. Fluid Mechanics 1:20 (in Russian)
Gilinsky SN, Zapryanov ZD, Chernyi GG (1966) Supersonic sphere flow around by gas mixture. Fluid Mechanics 5:8 (in Russian)
Korobeinikov VP (1973) Problems of point explosion theory in gases. Science, Moscow (in Russian)
Korobeinikov VP, Melnikova NS, Ryazanov EV (1961) Theory of point explosion. Phys Math State Publisher, Moscow (in Russian)
Lee JH (1977) Initiation of gaseous detonation. Ann Rev Phys Chem 28:75
Lehr HF (1972) Experiments on shock-induced combustion. Astr Acta 4–5:589
Levin VA, Markov VV (1975) Detonation occurrence at concentration energy supply. Combustion, Explosion and Shock Waves 4:623 (in Russian)
McVey IB, Toong T (1971) Mechanism of instabilities of exothermic hypersonic blunt-body flows. Comb Sciences and Technology 3:63
Ruegg FW, Dorsey WW (1963) General discussion. In: 9th Symp Intl on Comb. pp 476–477
Samozvantsev MP (1964) On stability of detonation waves by poor flown around bodies. J Appl Mech and Tech Phys 4:126 (in Russian)
Tsikulin MA (1960) Air shock wave at explosion of a cylindrical charge with big length. J Appl Mech and Tech Phys 3:188 (in Russian)
Tsikulin MA (1969) Shock waves at large meteorites moving in atmosphere. Science, Moscow (in Russian)
Uljanitsky VY (1980) Closed model of direct initiation of gaseous detonation with account of instability. Combustion, Explosion and Shock Waves 4:79 (in Russian)
Vasiljev AA(1983) Investigation of critical initiation of gaseous detonation. Combustion, Explosion and Shock Waves 1:121 (in Russian)
Vasiljev AA (1989) Spatial excitation of multifront detonation. Combustion, Explosion and Shock Waves 1:113 (in Russian)
Vasiljev AA, Grigorjev VV (1980) Critical conditions of gaseous detonation propagation in channels of abrupt area change. Combustion, Explosion and Shock Waves 5:117 (in Russian)
Vasiljev AA, Mitrofanov VV, Topchian ME (1987) Detonation waves in gases. Combustion, Explosion and Shock Waves 5:109 (in Russian)
Vasiljev AA, Nikolaev YA (1976) The model of multi-headed detonation cell. Combustion, Explosion and Shock Waves 5:744 (in Russian)
Vasiljev AA, Nikolaev YA, Uljanitsky VY (1979) Critical initiation energy of multi-front detonation. Combustion, Explosion and Shock Waves 6:94 (in Russian)
Zeldovich YB, Shlyapintokh IY (1949) Initiation of explosive gaseous mixtures in shock waves. Rep of Academy of Sciences USSR 115:6,871 (in Russian)
Zlatin NA, Krasilshikov AP, Mishin GI, Popov NN (1974) Ballistic apparatus and their application in experimental investigation. Science, Moscow (in Russian)
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Vasiljev, A.A. Initiation of gaseous detonation by a high speed body. Shock Waves 3, 321–326 (1994). https://doi.org/10.1007/BF01415830
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DOI: https://doi.org/10.1007/BF01415830