建立小型非对称机翼无人机的三维计算模型,数值模拟研究其外形参数对滚转力矩的影响。结果表明,不同机翼安装位置于机身连接处形成的不同压力场,是机身滚转力矩形成的主要原因;来流攻角和速度一定时,机身滚转力矩仅随左右机翼高度差∆h变化,不受滚转角β和上反角θ的影响;∆h和θ共同对左右机翼滚转力矩差产生影响,且θ对由∆h产生的机翼滚转力矩差有抑制作用,而β的影响很小;综合来看,由∆h引起的滚转力矩较小,存在修正的可能。

In this paper, a three-dimensional computational model of small UAV with asymmetric wing was established, then the influences of the configuration parameters on its rolling moment were studied by numerical simulation.The results indicate that the main reason for formation of fuselage rolling moment is different pressure fields that locate at the different installation sites where wing contacts fuselage; When angle of attack and velocity of flow remain unchange, the fuselage rolling moment only varies with height difference of left and right wing, and it is not affected by angle of roll and dihedral; The rolling moment difference of left and right wing is affected by the dihedral and height difference of left and right wing, meanwhile, the dihedral has an inhibitory effect on rolling moment difference generated by height difference of left and right wing; Comprehensively, the rolling moments generated by height difference of left and right wing are relatively small, and it is possible to correct them.