Cavitation-induced ignition of cryogenic hydrogen-oxygen fluids

Details Cavitation-induced ignition of cryogenic hydrogen-oxygen fluids Cavitation-induced ignition of cryogenic hydrogen-oxygen fluids

2011-01-08

arxiv.org/abs/1101.1564v1

Physics

Fluid Dynamics

Scientific paper

The Challenger disaster and purposeful experiments with liquid hydrogen (H2) and oxygen (Ox) tanks demonstrated that cryogenic H2/Ox fluids always self-ignite in the process of their mixing. Here we propose a cavitation-induced self-ignition mechanism that may be realized under these conditions. In one possible scenario, self-ignition is caused by the strong shock waves generated by the collapse of pure Ox vapor bubble near the surface of the Ox liquid that may initiate detonation of the gaseous H2/Ox mixture adjacent to the gas-liquid interface. This effect is further enhanced by H2/Ox combustion inside the collapsing bubble in the presence of admixed H2 gas.

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