请问直升飞机的飞行原理

2025-04-01 22:26:39
推荐回答(4个)
回答1:

简单来说直升机的动力来自燃料燃烧转换成螺旋桨的旋转,以此产生巨大的升力。应该感觉过风扇吹出的风吧,想象这股风巨大到可以以此对抗地球引力,那第一步直升机就升了起来,当升力与引力平衡,就悬停。
那么怎样让直升机前进呢,想象这股本来向上的巨大升力,我们让它偏向前一点又会怎样,它一部分会抵消掉引力,一部分则牵引直升机向前,那么前进后退也就解决了。
至于那个“小螺旋桨”,既然大螺旋桨是在转的,那么为什么转的是大螺旋桨而不是机身呢,其实在发动机给予大螺旋桨旋转的扭力时,大螺旋桨也在反作用于发动机以及固定发动机的机身,而平衡这个扭力就是小螺旋桨的任务了,它吹出的风在水平方向上产生力,因此它可以调整方向。
那么是不是飞得高就省油呢,当然不一定,首先高度的小范围变化对地球半径而言是可以忽略不记得,引力变化微小;当更大的变化时,发动机要考虑空气温度变化,密度变化,含氧量变化,因此耗油量与功率不是简单的变大变小。
至于电影中的花样动作,不知道电影上是什么样,但直升机的飞行从理论上讲的确很灵活,尤其是方向的变化,甚至理论上可以360度旋转;但本身比喷气战机速度低,速度变化慢,操控复杂,因此在实际操纵中还是很中规中矩。

回答2:

先搜一下直升机的简介吧,百科里都有。
回答你的疑问。
1、并不是升的越高越省油,引力在这几千米内的变化完全可以忽略,其主要影响的是大气密度。每种飞机都有一个巡航高度和与之对应巡航速度,这种情况下最省油。
2、直升机现在使用涡轮轴发动机,是涡轮发动机的一个变种,烧的是油,航空燃油。
3、直升机通过调节副翼拉杆,也就是使旋翼的左右倾斜,可以很轻松的实现凌空翻滚。
4、尾桨用于单旋翼直升机,用于确定飞行方向。因为主旋翼旋转时产生巨大的反扭力,必须在尾部用尾桨产生反向力来平衡。
5、直升机的动力和升力都来自主旋翼。当其向前飞行时,主旋翼产生的力,分解为垂直向下抵消重力的升力和水平向后抵消阻力的推力(就这么比喻吧)。
粗略就这么解释吧,直升机是很复杂的东西,比固定翼飞机晚出现30年左右的时间,现在能独立制造固定翼飞机的国家很多,但能独立制造直升机的并不很多。
OK?

回答3:

补充:电视上的战斗直升机发动机也有喷气发动机,但是喷气发动机大部分动力都用来驱动螺旋桨,所以就看不到喷气飞机那样飞行,进气孔放那都不是完全定格的,上面,侧面都可以。排气也一样

回答4:

直升机的控制主要依靠周期变距系统
模型直升机能完成比电影中更匪夷所思的特技
真的直升机因桨叶刚性,桨毂强度等问题不能完成高强度的动作

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