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空气动力中心

两个典型翼型的表面压力分布图,图中 c.a 即为空气动力中心。

空气动力中心(英語:aerodynamic center,简称AC)在空气动力学中是指翼型上的一个定点,绕该点的俯仰力矩不随迎角的改变而变化,即

其中为该点的俯仰力矩系数,为迎角。根据薄翼理论,空气动力中心位于翼型的四分之一弦长处。

空气动力中心是飞机稳定性分析中的重要参数。当空气动力中心靠后时,飞机更为稳定。

参考文献

[编辑]
  • Benson, Tom. Aerodynamic Center (ac). The Beginner's Guide to Aeronautics. NASA Glenn Research Center. 2006 [2006-04-01]. (原始内容存档于2021-06-08). 
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空气动力中心
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