低压环境下可燃液体火灾危险性的实验研究

Experimental study and hazard analysis on flammable liquids in an altitude chamber

闪点是评价可燃液体火灾危险性的主要指标之一,同时也是可燃液体的重要物性.通过模拟低压环境,选取两种纯净物(正癸烷、正己醇)和两种混合物(0#柴油、航空煤油)在35,45,55,65,75,85,95和101kPa 8个不同压力下进行闭口杯闪点连续测量实验.结果表明:在模拟低压环境中,闪点与压力存在非线性的对应关系,利用先前研究的理论进行分析验证,模拟低压情况与真实情况符合较好.在此基础上,结合火灾危险性的分类标准,给出可燃液体的火灾危险性等级随环境压力变化的规律.研究结果可为高原环境中燃油的安全生产、储存、运输和使用,以及航空防火安全提供科学依据.

Flash point ,one of the main indicators to evaluate the fire hazard ,is an important physical property of the flammable liquids .Using a portable flash point measuring apparatus ,a series of measurements of two mono compound fuels （n-decane and n-hexanol） and two mixture compound fuels （0# diesel and Jet A） at different pressures were carried out in an altitude chamber at 35 ,45 ,55 ,65 ,75 ,85 ,45 and 101 kPa .The experiment results show that the flash point is in a non-linear relationship with the pressure . And using the theoretical analyses from previous studies ,it can be verified that analog low pressure is in good agreement with the real situation .Based on the classification codes in China ,the fire hazard class of the flammable liquids at different pressures has been given .The results can provide a scientific basis for the production ,storage ,transport and use of fuel in the plateau environment ,as well as fire safety in aviation .