气相爆轰波在90矩形弯管中传播时胞格结构的演化

利用烟迹技术实验获得气相爆轰波在90矩形弯管中传播时留下的胞格图案，详细分析了胞格结构在矩形弯管中的演化规律。同时分析了90矩形弯管的曲率半径和预混气体初始压力对胞格结构演化的影响。实验所采用的预混气体初始压力为33.3、26.7、24.0、16.0、10.7 kPa，90矩形弯管的曲率半径分别为100、50 mm。研究爆轰波胞格结构在弯管中的演化过程有助于深入了解气相爆轰波绕射机理和石油天然气等管道设计。

Cellular structure evolution of gaseous detonation in a 90°rectangular bend

Cellular patterns were recorded by smoke tracing technique, and evolution of cellular structure was analyzed in detail when gaseous detonation propagates in the 90° rectangular bend. The influences of initial pressure of combustible gas and curvature radii of 90° rectangular bend were also investigated. Initial pressures of combustible gas used in the experiments were 33.3, 26.7, 24.0, 16.0, 10.7 kPa, respectively. The curvature radii of rectangular bend were 100 mm and 50 mm. Study of evolution of detonation cell in the bend might further the understanding of the mechanism of gas detonation diffraction and improve the design of pipes in the petroleum or natural gas industry.