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为研究展向柔性对扑翼推力的影响及产生影响的原因,该文使用一种折叠翼模型作为研究对象,改变展向折叠的弹性系数,联立求解N-S方程和刚体运动方程,并进行了展向柔性对推力影响原因的分析。结果表明:适当的展向柔性可以减小阻力系数,但过大的展向柔性却会增加阻力系数;展向柔性之所以能够改变阻力系数,是因为展向柔性的引入改变了有效攻角沿展向的分布。若展向柔性的引入能够增加有效攻角绝对值沿展向的分布,那么就可以减小瞬时阻力系数。
In order to study the influence of spanwise flexibility on the thrust of flapping-wing and its causes, a folding wing model was used as the research object to change the elastic coefficient of span-wise folding and solve the NS equation and the rigid body equation of motion simultaneously. Analysis of the Influence of Spread Flexibility on Thrust. The results show that proper stretch flexibility can reduce the drag coefficient, but too large stretch flexibility will increase the drag coefficient. The reason why the stretch flexibility can change the drag coefficient is because the introduction of stretch flexibility changes the effective angle of attack Exhibition of the distribution. If the introduction of span flexibility can increase the distribution of the absolute value of the effective angle of attack in the span direction, then the instantaneous drag coefficient can be reduced.