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789
机舱内白烟环绕。(网络视频截图)
近日一架从峇里岛飞往澳洲的捷星航空(JetStar)班机,才起飞不久机舱内就冒出阵阵白烟,乘客纷纷被眼前白烟吓得惊慌失措,以为是飞机故障!不过,其实“真相”就不过是一种自然现象,那就是“冷凝”。
面对着惊慌失措的乘客们,空姐赶紧解释说这不过是冷暖空气交流时的自然现象。
空姐通过广播解释,“各位女士、先生,由于空调温度像是冬天般寒冷,当外头暖空气进入飞机内,就会产生冷凝的现象,请乘客切勿担心,等我们到达了一定高度,冷凝现象就会清除了。”
有乘客将白烟冒出的状况拍下上传至Youtube,吸引了许多人观看。从曝光影片中可看到,有乘客开玩笑表示,“嘿各位,我觉得我们的飞机上有干冰,我想我在做梦。”
事后,捷星航空发言人指出,当客机在暖空气与冷空气之间飞行时,机舱内会发生冷凝,在这种情况下,温度差异会影响冷凝现象的范围,不过,乘客不必过度担心。
何为“冷凝”
冷凝(Condensation)是气体或液体遇冷而凝结,如水蒸气遇冷变成水,水遇冷变成冰。 温度越低,冷凝速度越快,效果越好。冷凝和蒸发是作用相反的两个物理过程。
基本上,从原理上来说,汽车玻璃起雾原因也是同样的现象,乃车内热空气遇到冷玻璃促成水汽凝结在玻璃内侧。
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