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Proceedings Paper

Theoretical and experimental studies of laser-initiated detonation waves for supersonic combustion
Author(s): MauSong Chou; Francis E. Fendell; H. Wilhelm Behrens
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Paper 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.

Paper Details

Date Published: 24 May 1993
PDF: 14 pages
Proc. SPIE 1862, Laser Applications in Combustion and Combustion Diagnostics, (24 May 1993); doi: 10.1117/12.145710
Show Author Affiliations
MauSong Chou, TRW Space and Technology Group (United States)
Francis E. Fendell, TRW Space and Technology Group (United States)
H. Wilhelm Behrens, TRW Space and Technology Group (United States)

Published in SPIE Proceedings Vol. 1862:
Laser Applications in Combustion and Combustion Diagnostics
Larry C. Liou, Editor(s)

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