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首页> 外文期刊>Energy Conversion & Management >Turbulence influence on explosion characteristics of stoichiometric and rich hydrogen/air mixtures in a spherical closed vessel
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Turbulence influence on explosion characteristics of stoichiometric and rich hydrogen/air mixtures in a spherical closed vessel

机译：湍流对球形密闭容器中化学计量和富氢/空气混合物的爆炸特性的影响

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摘要

Explosion always occur in turbulent ambience, but few researches focusing on the effects of turbulence on explosion characteristics has been performed in the current. In the present investigation, the effects of initial turbulence on the explosion characteristics of stoichiometric and rich hydrogen-air mixtures were experimentally studied and analyzed on the basis of explosion pressure traces. Maximum explosion pressure, explosion duration, maximum rate of pressure rise, fast explosion duration, deflagration index, and the averaged heat flux through the wall during explosion were systematically examined. The results indicated that, turbulence will reduced the corresponding equivalence ratio to maximum rate of pressure rise but won't change the corresponding equivalence ratios to maximum explosion pressure and two explosion durations. In turbulent ambience, two explosion durations will decline for the accelerated propagation of pressure wave, the values of maximum explosion pressure and maximum rate of pressure rise will be raised for the reduced heat flux through the vessel's wall during explosion.
机译：爆炸总是在湍流的环境中发生，但是目前很少进行集中于湍流对爆炸特性影响的研究。在本研究中，根据爆炸压力迹线，对初始湍流对化学计量和富氢-空气混合物的爆炸特性的影响进行了实验研究和分析。系统地检查了最大爆炸压力，爆炸持续时间，最大压力上升速率，快速爆炸持续时间，爆燃指数以及爆炸过程中穿过壁的平均热通量。结果表明，湍流将减小对应的当量比至最大爆炸速率，但不会改变对应的当量比至最大爆炸压力和两次爆炸持续时间。在湍流的环境中，两个爆炸持续时间将随着压力波的加速传播而减小，爆炸时最大的爆炸压力和最大压力上升率的值将增加，以减小通过容器壁的热通量。

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