NUMERICAL SIMULATION OF COMBUSTION WAVE PROPAGATION IN AN AIR-FUEL SPRAY MIXTURE WITH TEMPERATURE NONUNIFORMITY

Abstract

The initiation and propagation of detonation waves in an air-fuel spray mixture has been numerically analyzed. The mathematical formulation of the two-phase flows is based on the Eulerian-Lagrangian approach. The improved pressure-based method is applied to handle the strong velocUy-pressure-density coupling in the transient heterogeneous reacting flows. Numerical results indicate that variations in the temperature gradient, droplet size, and fuel vapor concentration have significant effects on the formation and propagation of the spray detonation wave. The interaction mechanism between the flame-generated pressure wave and the spray-combusting wave is also discussed in detail.

Notes

Address correspondence to Prof. Yong-Mo Kim, Department of Mechanical Engineering, Hanyang University, 17 Haengdang-Dong, Sungdong-Ku, Seoul, 133–791, Korea. E-mail: ymk@ymk009. hanyang.ac.kr