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为什么我在电风扇后面盖上窗帘,风会小很多?

2025-03-15 23:28:01

推荐回答（1个）

回答1：

空气既不会凭空产生,也不会凭空消灭,它只会从一个点转移到其他的点,而在转移的过程中,总量保持不变。这就是“ 空气流通定律”风扇讲:我们不生产风,我们是大自然的搬运工。---------------------------------------------------------------------------------------------------------------------------------------------从空气动力角度来看气体在三个方面守恒:质量守恒 :只有在气体的速度高至必须考虑相对论效应时此定律才会失效。动量守恒 :由牛顿第二定律推导可得。能量守恒 :在不考虑粘性时,即机械能守恒;在必须考虑粘性的情况下,即机械能和热能的守恒。*参看:空气动力学- wikipedia电风扇后有遮挡物对气体流入总量是有影响的(阻碍并减小),据其守恒可推测“流出量”不可能凭空的增加那么自然要小喽。不能更准确详细的用空气动力学原理解答很遗憾呐。
记得采纳啊

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