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通过基于有限体积的CFD数值方法研究了MA60飞机螺旋桨滑流对于该飞行器的气动特性影响机理。为了高效计算、准确描述螺旋桨的旋转运动产生的非定常流场,本文采用嵌套网格技术来实现这一过程,有效避免了螺旋桨运动过程中产生的网格变形失效等问题。数值模拟结果表明:滑流非定常计算的表面气动压力可以很好地与实验结果吻合;螺旋桨滑流状态的非定常气动力与定常计算的结果有较大差异,螺旋桨具有较大的拉力且为同向旋转,产生不对称的气动载荷,导致飞机的升力增大,侧向力增大,并且产生正的滚转力矩和负的偏航力矩。本文研究表明,在该类型飞行器设计过程中,考虑滑流影响可以更加准确地描述飞行过程中的气动载荷。
The effect mechanism of MA60 aircraft propeller slip flow on the aerodynamic characteristics of the aircraft is studied by CFD numerical method based on finite volume. In order to calculate and accurately describe the unsteady flow field generated by the propeller’s rotational motion, this paper uses nested grid technology to realize this process, which effectively avoids the grid deformation failure caused by the propeller movement. The numerical simulation results show that the surface aerodynamic pressure calculated by unsteady flow can be in good agreement with the experimental results. The unsteady aerodynamic force in the slipstream state of propeller is quite different from the steady-state calculated results. The propeller has a large tension and is Rotating in the same direction produces an asymmetric aerodynamic load resulting in an increase in lift force, an increase in lateral force, and a positive roll moment and a negative yaw moment. The research in this paper shows that the aerodynamic load during flight can be more accurately described in the design of this type of aircraft considering slipstream effects.