Study of detailed chemical reaction model of hydrogen-air detonation

Abstract

An appropriate chemical reaction model plays a main role to simulate detonation numerically. Several researchers have been suggested different detailed chemical reaction models, however calculated detonation cell sizes are much smaller than experimental ones due to several reasons. In this paper three detailed chemical reaction models (Stanford, Nagoya, and Modified Jachimowski model) are studied using oneand twodimensional Euler equations for hydrogen/air mixtures. Detonation cell size, reaction model sensitivity to cell size, and detailed detonation structure are investigated for three reaction models especially focusing on pressure dependent reactions: Stanford model has a pressure dependent reaction. The results showed that detonation cell size significantly depends on the pressure dependent reaction: Stanford model provides the largest detonation cell size among three models, which is the closest to experimental data. Sensitivity analyses also revealed that the pressure dependent reaction is the most sensitive to detonation cell size.