Numerical Investigation on the Propagation Mechanism of Steady Cellular Detonations in Curved Channels
LI Jian1,2, NING Jian-Guo1**, ZHAO Hui1, HAO Li3, WANG Cheng1
1State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081 2Department of Mechanical Engineering, McGill University, Montreal H3A2K6, Canada 3School of Science, Beijing University of Civil Engineering and Architecture, Beijing 100044
Abstract：The propagation mechanism of steady cellular detonations in curved channels is investigated numerically with a detailed chemical reaction mechanism. The numerical results demonstrate that as the radius of the curvature decreases, detonation fails near the inner wall due to the strong expansion effect. As the radius of the curvature increases, the detonation front near the inner wall can sustain an underdriven detonation. In the case where detonation fails, a transverse detonation downstream forms and re-initiates the quenched detonation as it propagates toward the inner wall. Two kinds of propagation modes exist as the detonation is propagating in the curved channel. One is that the detonation fails first, and then a following transverse detonation initiates the quenched detonation and this process repeats itself. The other one is that without detonation failure and re-initiation, a steady detonation exists which consists of an underdriven detonation front near the inner wall subject to the diffraction and an overdriven detonation near the outer wall subject to the compression.
. [J]. 中国物理快报, 2015, 32(4): 48202-048202.
LI Jian, NING Jian-Guo, ZHAO Hui, HAO Li, WANG Cheng. Numerical Investigation on the Propagation Mechanism of Steady Cellular Detonations in Curved Channels. Chin. Phys. Lett., 2015, 32(4): 48202-048202.
2015, Vol. 32 
