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用无水乙醇作为试验样品,研究可燃液体蒸气的最小点火能。通过加热高闪点喷气燃料在半封闭空间中形成饱和蒸气,由克拉佩龙-克劳修斯方程和道尔顿分压定律得到不同加热温度对应的油蒸气体积分数,利用点火能试验台放电引爆油蒸气,得到了不同体积分数蒸气对应的最小点火能。试验结果表明,高闪点喷气燃料的敏感蒸气体积分数为3.18%,对应的最小点火能为9.075mJ;蒸气浓度过高和过低都会导致最小点火能增加。利用热爆炸机理和链式反应理论解释试验结果。
With ethanol as a test sample, study the minimum ignition energy of flammable liquid vapor. By heating the high flashpoint jet fuel to form saturated vapor in the semi-enclosed space, the oil vapor volume fraction corresponding to different heating temperatures is obtained by the Clapellon-Clausius equation and the Dalton partial pressure law. The ignition test bench discharge Detonated oil vapor, obtained the corresponding volume of steam corresponding to the minimum ignition energy. The experimental results show that the sensitive vapor volume fraction of high flashpoint jet fuel is 3.18%, corresponding to the minimum ignition energy of 9.075mJ; the vapor density is too high and too low will lead to the minimum ignition can increase. The thermal explosion mechanism and chain reaction theory are used to explain the test results.