HYPERSONIC BLUNT BODY FLOW OF HYDROGEN-OXYGEN MIXTURES.
PURDUE UNIV LAFAYETTE IND PROJECT SQUID HEADQUARTERS
Pagination or Media Count:
The stagnation region of the shock layer in high velocity flow of hydrogen-oxygen mixtures over blunt bodies is investigated. The method of series truncations is used to obtain numerical solutions of the conservation equations, using complete hydro-oxygen kinetics. A local linearization scheme is applied to the integration of the chemical rate equations in order to reduce computation time. First order solutions are obtained with acceptable accuracy in a relatively short computation time. A second order solution is computed in one case to test the convergence and results in negligible modification of the first order solution. In qualitative agreement with experimental observations, it is found that there is a steep combustion front between the shock and the body, and that combustion results in an increase in shock standoff distance as compared to non-reactive flow. The results are consistent with a previously developed scaling law for hydrogen-oxygen flows. Near-frozen flows exhibit a thin region of rapid chemical reaction adjacent to the body. A parameter identifying this regime is developed, and the shock layer flow of an idealized reacting gas is investigated. An equation describing this flow is presented, and preliminary results indicate that the gas model exhibits the important characteristics of near-frozen shock layer flows. Author
- Fluid Mechanics
- Combustion and Ignition