Based on and starting from the false-displacement fundamental, this paper puts forward a simple, general and effective method for deriving the pressure Angle expressions of earn mechanisms.
以虚位移原理为理论基础和出发点，提出了一种简单通用、行之有效的推导凸轮机构压力角表达式的新方法。
In the case of Angle of attacks, the high pressure region before the leeward side jet enlarged, the region of jet wraparound effect moving forward, and the jet interaction control was more effective.
有攻角时，背风侧喷流前的高压区更大，喷流包裹作用的影响区域前移，喷流的控制效果更好，这一趋势随攻角的增大更加明显。
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