Abstract
Extensive studies of detonation initiation by a turbulent jet of combustion products over the past three decades are aimed at to clarify the mechanism of transition from deflagration to detonation (DDT). Numerous experiments [1–8] under different conditions give decisive evidence that detonation by jet mixing can be initiated both in confined and unconfined geometry. The inconsistency in the experimental data of different authors can be due to the different jet formation techniques used. The disadvantage of the flame jet drivers [1,5,8] is given by the continuous outflow of the unburned mixture in front of the flame front. This outflow can lead to a significant turbulization of the mixture downstream of the jet and in this case detonation starts under uncontrolled conditions. This difficulty can be overcome by the use of the bursting membrane technique [2–4,6,7]. In this case, the jet upstream stagnation conditions immediately in front of the jet orifice are maintained. However, the fragments of the bursting membrane can significantly influence the flow properties of the jet.
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Medvedev, S.P., Khomik, S.V., Olivier, H., Polenov, A.N., Bartenev, A.M., Gelfand, B.E. (2005). Jet-initiated hydrogen detonation phenomena. In: Jiang, Z. (eds) Shock Waves. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-27009-6_121
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DOI: https://doi.org/10.1007/978-3-540-27009-6_121
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