桨叶实度及轴间距对摆线桨气动特性影响研究

悬停状态下,设计参数和摆线桨间距离对摆线桨的气动特性有较大影响。首先通过算例验证滑移网格计算方法应用于摆线桨悬停状态下气动力计算的准确性,然后研究摆线桨在不同半径、弦长和桨叶数时的气动参数特性,最后计算分析不同距离时,摆线桨间的气动干扰特性。结果表明:随着半径增大,桨叶气动力和单位面积上载荷均增大;弦长越大,气动力越大,桨叶单位面积上载荷反而越小;4叶片摆线桨产生的气动力比3叶片和6叶片大,而3叶片的桨叶载荷最大;合力偏转角分别随转速和实度的增大而减小;随着摆线桨间距离的增加,气动力损失系数和合力偏转角均减小。

Study on Aerodynamic Characteristics of Cyclorotor with Blade Solid and Distance between Axis

In order to study the aerodynamic characteristics of cyclorotor in hovering, the accuracy of the calculation method applied to the aerodynamics calculation was verified with an example. Then, the aerodynamic parameters of cyclorotor with different radia, chord and number of blades were studied, and the aerodynamic interfere of cyclorotor with different distances was calculated and analyzed. The results have shown that with the increase of radius, the aerodynamics and the load per unit area of the blade increase; the larger the chord, the larger the aerodynamics, the smaller the load per unit area of the blade; the aerodynamics generated by the 4-blade cyclorotor is larger than that of 3-blade cyclorotor and 6-blade cyclorotor, while the blade load of 3-blade cyclorotor is the largest; the resultant deflection angle decreases with the increase of the rotational speed and the solidity respectively; with the increase of the distance among the cyclorotors, the aerodynamic loss coefficient and the resultant force deflection angle are decreased.