基于ANSYS的直升机柔性转子的气动声学设计优化

An Optimized Design to Aeroacoustic of Flexible Rotors for Helicopter Forward-flying Flexible Rotors Based on ANSYS

介绍了一种直升机柔性转子的气动声学设计优化方法的开发与应用。多学科设计优化方法结合了空气动力学、气动弹性和气动声学3个学科,来确定最佳的柔性转子形状,从而在前倾飞行中最小化转子所需的扭矩,以降低噪声的来源。通过与一些声学工具的对比,首次验证了新实现的气声性能,能够有效地降低飞行噪声。通过改变叶片的形状,在减小磁场观测器处的声学信号的同时,使前倾飞行中的柔性转子所需的扭矩最小化。提出的伴随公式可以有效地计算优化算法所要求的灵敏度。通过理论分析、CATIA三维建模和ANSYS仿真分析对直升机的柔性转子进行了气动声学的研究。

This paper presents the development and application of an aeroacoustic optimized design method for helicopter forward-flying flexible rotors.The multidisciplinary design optimized method combines the three disciplines of aerodynamics,aeroelasticity and aeroacoustics to determine the best flexible rotor shape,thereby minimizing the torque required by the rotor during forward tilting flight to reduce the source of noise.Through the comparison with some acoustic tools,the newly realized air-acoustic performance is verified for the first time,which can effectively reduce the flight noise.By changing the shape of the blade,while reducing the acoustic signal at the magnetic field observer,the torque required for the flexible rotor in forward tilting flight is minimized.The adjoint formula proposed can effectively calculate the sensitivity required by the optimized algorithm.Through theoretical analysis,CATIA three-dimensional modeling and ANSYS simulation analysis,the aeroacoustics of the helicopter’s flexible rotor is studied.