A Study on the Hydrogen-Oxygen Diffusion Flame in High Speed Flow
TOKYO INST OF TECH (JAPAN) DEPT OF MECHANICAL ENGINEERING
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A new type of apparatus was adapted to the study on the diffusion flame in high speed flow with the use of a shock tubedetonation tube combination. The flows behind the incident shock wave propagating into O2-Ar mixture and the burned gas behind the detonation wave traveling into a fuel-rich H2-O2-Ar mixture were used to produce a fuel flow and an oxidizer flow respectively. The burned gas was issued through a nozzle in parallel to the oxidizer flow and two-dimensional flow field was established at the test section of the shock tube. The process from the starting of the flows to the formation of a diffusion flame was investigated by the pressure measurements in both tubes and by schlieren and interferometric photography. Also the ignition distances of the diffusion flames in quasi-steady state were measured from direct photography. As a result, a detonation tube was shown to be a useful device for producing a high speed and high temperature flow and it was confirmed that the ignition distance is greatly influenced by both velocity difference and hydrogen concentration.
- Combustion and Ignition