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首页> 美国政府科技报告 >Characterization of the Pressure Field Induced by the Explosions in Air of a Hydrocarbon-Air Mixture with Slow Deflagration or Fast Deflagration
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Characterization of the Pressure Field Induced by the Explosions in Air of a Hydrocarbon-Air Mixture with Slow Deflagration or Fast Deflagration

机译：具有缓慢爆燃或快爆燃的烃 - 空气混合物在空气中爆炸引起的压力场表征

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The present research contract, carried out in the framework of a French working group CEA-EDF-ENSMA, was divided into four phases: 1) Phase 1: Scaling effects on a pressure field generated by spontaneous accelerations of deflagrations in a homogeneous medium: these ''CHARLES'' tests performed on completely unconfined charges of ethylene-air and acetylene-air mixture (V approximately= 12 m exp 3 ) have demonstrated the high sensitivity of the pressure field to the flame acceleration, particularly at the end of the propagation. 2) Phase 2: Effect of a sudden discontinuity in the concentration of the combustible gas on the deflagration speed in a heterogeneous medium: this discontinuity was obtained using two concentric latex balloons, filled with different hydrocarbon concentrations and also destroyed before firing. 3) Phase 3: Study of pseudo-detonation modes for the explosion of spherical ethylene-air mixtures: these modes were sought by increasing an explosive plastic mass associated to the igniter. 4) Phase 4: Study of the influence of cloud shape, ignition point location and simple obstacles in the flame path on the pressure field generated by the explosion. A retractable enclosure was designed, built and unfortunately destroyed by the second test. (ERA citation 11:000602)

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