Effect of Surface Roughness on Deflagration-to-Detonation Transition in Submilimeter Channels
Effect of Surface Roughness on Deflagration-to-Detonation Transition in Submilimeter Channels
复制标题
表面粗糙度对亚毫米通道中爆燃到爆炸转变的影响
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
E. Oran
中科院分区：
文献类型：
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作者：
R. Houim;E. Oran
虽然DDT在实验中通常发生在湍流火焰存在的障碍物装载通道，层流火焰的加速也可以导致爆震。一个例子是亚毫米通道和间隙中的火焰传播[4-10]。在这些细通道中，当火焰加速时产生前驱激波，这在火焰前面产生边界层。冲击加热和粘性耗散的组合可以增加边界层中的温度，直到发生自燃[5，11，12]。由此产生的自发波，反过来，导致起爆。
Though DDT in experiments usually occurs in the presence of turbulent flames in obstacle-laden channels, acceleration of laminar flames can also lead to detonation. One example is flame propagation in submillimeter channels and gaps [4–10]. In these thin channels a precursor shock is produced as the flame accelerates, which creates a boundary layer in front of the flame. A combination of shock heating and viscous dissipation can increase the temperature in the boundary layer until autoignition occurs [5, 11, 12]. The resulting spontaneous wave, in turn, leads to the initiation of a detonation.