, Volume 23, Issue 2, pp 115-130

Photographic investigation into the mechanism of combustion in irregular detonation waves

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Abstract

Irregular detonations are supersonic combustion waves in which the inherent multi-dimensional structure is highly variable. In such waves, it is questionable whether auto-ignition induced by shock compression is the only combustion mechanism present. Through the use of high-speed schlieren and self-emitted light photography, the velocity of the different components of detonation waves in a ${\text{ CH}}_4+2\text{ O}_2$ mixture is analyzed. The observed burn-out of unreacted pockets is hypothesized to be due to turbulent combustion.

Support from the National Science and Engineering Research Council of Canada (NSERC) was provided. Unlimited Release LA-UR-12-20755.
Communicated by N. N. Smirnov.