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为了研究飞机积冰的一般规律,增强飞行安全保障能力,利用2003年9月19日甘肃省人工增雨飞机空中观测资料和机载PMS粒子探测系统采集数据,分析了出现飞机积冰的气象条件和云层微物理结构。PMS探测到云层中云粒子浓度在0.05~5.91个/cm3,均值为0.93个/cm3;云中含水量均值为0.0043g/m3,最大值为0.0233g/m3;在6200米以上,云中粒子浓度、含水量以及平均浓度直径都较大。分析结果表明:飞机出现较强积冰时的温度低于-5℃;积冰出现在粒子总浓度和含水量较大区域,且雨滴浓度和平均直径的增大对积冰的出现具有重要作用;大粒子对发生积冰贡献值较大。
In order to study the general laws of aircraft ice accumulation and enhance the flight safety and security capability, the data of airborne precipitation of Gansu Province on September 19, 2003 and the airborne PMS particle detection system were used to analyze the weather conditions And cloud micro-physical structure. PMS detected clouds of cloud particles in the concentration of 0.05 ~ 5.91 / cm3, with an average of 0.93 / cm3; cloud water content of 0.0043g / m3, the maximum value of 0.0233g / m3; at 6,200 meters above the cloud particles Concentration, water content and the average concentration of diameter are larger. The results show that the temperature of the ice plane when the ice accretion is less than -5 ℃, and the ice accretion appears in the region where the total particle concentration and the water content are large. The increase of the raindrop concentration and average diameter plays an important role in the occurrence of ice accretion Large particles contribute to the ice accumulation.