Mechanism and Wind Tunnel Experiment of Active Controlled Flap on Vibration Load Control of Rotor Hub

doi:10.3901/JME.2023.14.254

Abstract

Abstract: Combining the rigid-flexible coupling dynamics model of the rotor with high precision and reliability and the aerodynamic model of rotor free-wake, an aeroelastic coupling model with blade vortex interaction including active control trailing edge flap (ACF) is established and the dynamic load control of the rotor hub based on ACF active control technology is carried out. The influence of advance ratio of rotor, control frequency of ACF and initial phase on control effect of vibration load of rotor hub were analyzed. The vibration control mechanism of ACF on rotor hub load under the condition of blade vortex interaction is obtained. The simulation analysis shows that when advance ratio is 0.15, the optimal control phase of ACF under 3/rev control is 300ånd that for 4/rev control is 270°. When the advance ratio is 0.12, the optimal control phase of ACF with 4/rev control becomes 190°. It is found that the ACF can effectively reduce the vibration load of the hub by controlling the initial phase so that the ACF has the minimum positive deflection at the blade vortex interaction region, while the control of the vibration load of the hub is not beneficial when the ACF has the maximum positive deflection at the blade vortex interaction region. The validation test of ACF open-loop control was carried out on the ACF rotor wind tunnel test bench. The results show that the test data conform to the control law presented, and the proposed control strategy can effectively reduce the vibration loads of rotor hub under different inflow conditions.

Key words: active controlled flap, blade vortex interaction, hub vibration, active control

CLC Number:

TG156

ZHOU Zixuan, TIAN Jiajin, TANG Min, WANG Chang, HUANG Xiuchang, HUA Hongxing. Mechanism and Wind Tunnel Experiment of Active Controlled Flap on Vibration Load Control of Rotor Hub[J]. Journal of Mechanical Engineering, 2023, 59(14): 254-263.

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