Reacting H2-O2 Richtmyer-Meshkov Instability Simulations Using Detailed Chemistry

Interaction of a shockwave with a flame enhances supersonic mixing and detonation, and is of importance to the design of supersonic combustors, internal combustion engines and fire safety. The Richtmyer-Meshkov instability plays a significant role in these phenomena. We present numerical results of a reacting Richtmyer-Meshkov instability (RMI) triggered by the interaction of a shock with a sinusoidally perturbed H2-O2 diffusion flame. The simulations were performed using a modified version of the astrophysical FLASH code [1]. A detailed H2-O2 reaction mechanism [2] coupled with an operator-split, 2nd order PPM method in FLASH was used to investigate the effect of RMI induced mixing on the flame. A parametric study for shock Mach numbers ranging from 1.2-3 over Atwood numbers of 0.4-0.65 was carried out, and the results will be presented. The detailed flame dynamics upon reshock will also be discussed.\\[4pt] [1] B. Fryxell, K. Olson, P. Ricker, F. Timmes, M. Zingale, D. Lamb, P. MacNeice, R. Rosner, J. Truran and H. Tufo, Astrophys. J., Suppl. Ser. 131, 273 (2000).\\[0pt] [2] G. Billet, J. Comput. Phys. 204, 319 (2005).