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纵列式双旋翼直升机的旋翼尾迹受前飞自由流、机身和旋翼之间的干扰影响,旋翼尾迹不仅影响机身的空气动力,也影响旋翼自身的空气动力特性。应用欧拉方程与计算流体力学(CFD)方法,采用自适应非结构直角网格技术生成计算域网格,数值模拟纵列式双旋翼直升机全机流场,给出了考虑旋翼影响的机身表面压力分布以及全机流场特性。
The rotor wake of the tandem helicopter is affected by the interference of the free-forward flight and the fuselage and rotor. The wake of the rotor not only affects the aerodynamics of the fuselage, but also affects the aerodynamics of the rotor itself. Euler equations and computational fluid dynamics (CFD) method are used to generate the computational domain grid by using adaptive unstructured right-angle grid technology. The whole flow field of the tandem helicopter is numerically simulated. The fuselage Surface pressure distribution and the whole flow field characteristics.