2011
DOI: 10.1016/j.combustflame.2011.03.001
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Ignition limits of rapidly expanding diffusion layers: Application to unsteady hydrogen jets

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Cited by 27 publications
(5 citation statements)
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“…The quenched detonation is thus a shock wave followed by a turbulent deflagration. This type of quenching has also been observed numerically for rapidly expanding diffusion layers applied to jet ignition of hydrogen [16]. The re-initiation process, however, is not so clear.…”
Section: Introductionsupporting
confidence: 57%
“…The quenched detonation is thus a shock wave followed by a turbulent deflagration. This type of quenching has also been observed numerically for rapidly expanding diffusion layers applied to jet ignition of hydrogen [16]. The re-initiation process, however, is not so clear.…”
Section: Introductionsupporting
confidence: 57%
“…For these cases, the associated transient computation should account for counteracting effects of the waves generated at the initial instant (i.e., a shock wave traveling into the fresh mixture and an accompanying expansion wave that propagates upstream from the slot into the burnt mixture). Such an analysis has been carried out in a closely related conf guration by Radulescu and coworkers [44,45,46], who studied the release of pressurized hydrogen gas at room temperature into ambient air, and the shock-induced ignition of the resulting one-dimensional unsteady mixing layer of fuel and oxidizer at the jet head. However, their results can not be easily extrapolated to our analysis of def agration initiation by hot products discharge.…”
Section: Numerical Resultsmentioning
confidence: 99%
“…This model was used to determine the changes in velocity, pressure, temperature, and density with time. Several authors [16][80][81] [84][85] [86] have studied local ignition problems during ignition of high-pressure hydrogen jets by numerical simulations. The researchers reached the conclusion that the occurrence of spontaneous ignition of the high-pressure hydrogen jet persisted even in the absence of an extension tube.…”
Section: Overview Of Experimental and Simulation Researchesmentioning
confidence: 99%
“…Several possible ignition mechanisms have been proposed to investigate the mechanism of spontaneous ignition of high-pressure leaking hydrogen [9], including inverse Joule-Thomson interaction [10,11] , electrostatic ignition [12][13][14], diffusive ignition [15], instantaneous adiabatic compression ignition [16], hot surface ignition [17][18][19][20], and mechanical friction and impact ignition [21]. Individually, none of them can provide a comprehensive explanation for all instances of spontaneous ignition resulting from hydrogen leaks.…”
Section: Diffusion Ignition Theorymentioning
confidence: 99%