The Influence of Initial Temperature on the Limits of Detonability

Pawel, D.; Vasatko, H.; Wagner, H. Gg.

doi:10.21236/ad0692900

Cited by 4 publications

(2 citation statements)

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“…These authors show that in the range of initial conditions they use, a decrease of the initial temperature shorten the deflagration to detonation transition length. Pawel et al (1969) report the effect of the initial temperature To, To = 135 K and To = 300 K on the limits of detonability of H2-O2 mixtures of various composition under atmospheric pressure. More precisely, they measure, for…”

Section: Introductionmentioning

confidence: 99%

Direct initiation of detonation in cryogenic gaseous H2-O2 mixtures

et al. 1995

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Abstract. Critical conditions for the direct initiation of selfsustained detonation in cryogenic hydrogen-oxygen mixtures are examined experimentally. These initial conditions are expected to depend mainly on four parameters: the equivalence ratio of the mixture, the amount of the initial energy deposition, the initial temperature and pressure of the mixture. These critical conditions are determined by fixing alternatively three of these parameters and varying the fourth one from subcritical to supercritical detonation conditions. Results are presented for initial pressures t:'o and equivalence ratios 9 ranging from 0.3 to 1 bar and from 1 to 2 respectively, for the two initial temperatures To, 123 K and 293 K. These results indicate that for the lowest values of the initial pressure, a decrease of initial temperature may favour the onset of detonation. Whatever the initial conditions, the measured detonation pressures and velocities are in reasonably good agreement with the corresponding Chapman-Jouguet values computed using the idealgas equation of state.

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Section: Introductionmentioning

confidence: 99%

Direct initiation of detonation in cryogenic gaseous H2-O2 mixtures

et al. 1995

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“…C UFL ðbarÞ ¼ 20 þ 8ð½%H 2 e76:5Þ 2 ðfor 20 bar C UFL 150 barÞ (38) C UFL represents an estimation of the lower flammability limit with a safety margin.…”

Section: Safe Methods 4211 Lean Mixtures Hydrogen Is Introduced Imentioning

confidence: 99%