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《EXPLOSION AND SHOCK WAVES》 1995-01
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AN EXPERIMENTAL STUDY ON THE ACCELERATING EFFECT OF THE ALUMINUM DUST FLAME WITH OBSTACLES

Liu Xiaoli;Li Hongzhi;Ye Jingfang;Liu Dianjin(Nanjing University of Science & Technology,210094)  
Obstacles setting repeatedly along the path of the flame propagation possess obvi-ously accelerating effect on the dust flame. The mechanism of the accelerating effect is attributedto the positive feedback of the turbulence region induced by obstacles for combutsion process.Themaximum explosion pressure p_(max) of the aluminum dust-air mixture in closed combustion vessel relies slightly on the existence of obstacles.The maximum rate of pressure rise(dp/dt)_(max) reliesstrongly on the existence of obstacles,because p_(max) depends on the total energy inside the vesseland (dp/dt)_(max) depends on the process of combustion,i.e.the rate of energy release.
【CateGory Index】: O381
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