Investigation of Multicomponent Diffusion in Numerical Simulation on H2-O2 Detonation Transition Process

Abstract

A numerical calculation method for detonation transition process using an experimental-scale grid was proposed in this study. This method consists of multicomponent diffusion model. Detonation transition experiments were conducted to investigate the usefulness of the proposed method. A detonation was generated in rectangular tube with a square cross section of 30 mm per side. The tube was filled with an oxyhydrogen mixture with an initial pressure of 100 kPa, and an equivalent ratio of 1.0. The time history of the flame front position was obtained by observation with a high-speed camera. The time history of flame front position by the proposed numerical method were compared with one by the experimental results. As a result, the results obtained by the proposed numerical model are in good agreement with the experimental results. It was also found that the effect of thermal diffusion can be neglected in the simulation of the detonation transition process.