The two-dimensional (2D) inclined stroke plane kinematics of insect wing is studied for various stroke plane angles using the Immersed Boundary (IB) solver. The numerical results revealed the dominant lift enhancement mechanisms for this class of flows. The generated dipole was analyzed to find the maximum velocity, inclination and spread. The analysis of these dipole characteristics for the different stroke plane angles exposed the alternate method to study the vertical force variation with the stroke plane angles. Lift enhancement mechanisms and dipole characteristics complement the high vertical force coefficient for the stroke plane angle of 60˚ commonly used by dragonflies during hover. The location of the dipole identified a region of influence around the wing and demonstrated the role of the dipole jet in multi-body dynamics and wall effects.

中文翻译：

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偶极子喷射在昆虫飞行倾斜中风平面运动学中的作用

使用“浸入边界”（IB）求解器研究了各种翼面角度的昆虫机翼的二维（2D）倾斜翼面运动学。数值结果揭示了此类流动的主要升力增强机制。分析产生的偶极子以找到最大速度，倾角和展宽。对不同行程平面角的这些偶极子特性的分析揭示了另一种方法来研究垂直力随行程平面角的变化。升力增强机制和偶极子特性补充了蜻蜓在悬停过程中通常使用的60°行程平面角的高垂直力系数。