Theoretical and experimental studies of laser-initiated detonation waves for supersonic combustion

MauSong Chou; Francis E. Fendell; H. Wilhelm Behrens

doi:10.1117/12.145710

24 May 1993 Theoretical and experimental studies of laser-initiated detonation waves for supersonic combustion

MauSong Chou, Francis E. Fendell, H. Wilhelm Behrens

Proceedings Volume 1862, Laser Applications in Combustion and Combustion Diagnostics; (1993) https://doi.org/10.1117/12.145710
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

Spherical detonations of C₂H₂/O₂/N₂ mixtures in an open flow system (initially at 1 atmosphere) and planar detonations of C₂H₂/O₂ and H₂/O₂/C₂H₂ mixtures in an enclosed tube are successfully initiated by use of an ArF laser at 193 nm. The required critical energy for the initiation of spherical detonations is found to be relatively low: approximately 12 +/- 2 mJ for a 40% C₂H₂ in C₂H₂/O₂ mixtures. This small critical energy may be attributed to a relatively strong absorption of C₂H₂ at 193 nm, and possible enhancement by the photodissociation products of C₂H and H. The initiation appears to be accomplished without overdriving the mixtures through a blast wave. The critical energy, delay time, detonation velocity and pressures are measured as functions of stoichiometric mixture ratio, initial pressure and incident laser energy, for both spherical and planar detonations.

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MauSong Chou, Francis E. Fendell, and H. Wilhelm Behrens "Theoretical and experimental studies of laser-initiated detonation waves for supersonic combustion", Proc. SPIE 1862, Laser Applications in Combustion and Combustion Diagnostics, (24 May 1993); https://doi.org/10.1117/12.145710

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