Detonation initiation techniques for pulse detonation propulsion

Фролов, С. М.

doi:10.1051/eucass/200901321

Cited by 7 publications

(1 citation statement)

References 18 publications

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“…A detonation wave can be obtained by direct-initiation or deflagration-to-detonation transition (DDT) processes. DDT length and time are crucial parameters for PDE applications [4] and safety. Several physical and chemical factors influence the DDT parameters [5], one of the most important being the mixture detonability.…”

Section: Introductionmentioning

confidence: 99%

Influence of moderate pressure nanosecond discharge on the structure of detonation wave

Cherif

Claverie

Vidal

et al. 2020

AIAA Scitech 2020 Forum

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The effect of a volumetric nanosecond discharge on detonation cell size was demonstrated experimentally in a detonation tube test rig. The experiments were performed in CH 4 :O 2 :Ar=1:2:2 mixture, at initial pressure 180 mbar and ambient temperature. The detonation wave was initiated in a 3.6-m long, 50 × 50-mm 2 square cross section tube, and entered the measuring section where the electrode system was installed to produce a double-pulse discharge ahead of the detonation front. The triggering of the discharge was synchronized with the arrival of the detonation front to the diagnostic chamber. The plasma was generated by two consecutive pulses of −50 and −32 kV amplitude on the high-voltage electrode and 25 ns pulse duration. It was shown that the plasma fills the entire interelectrode space. The analysis of the detonation cell size with and without plasma generation was performed via sooted-plate technique. Production of atoms and radicals in the discharge triggered combustion chemistry decreasing the ignition delay time. As a result, the detonation cell size was reduced by a factor of 1.5 − 2, while passing through the region of the discharge.

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Section: Introductionmentioning

confidence: 99%