ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Lift enhancement mechanism of dielectric elastic membrane airfoil
Received date: 2022-11-28
Revised date: 2022-12-13
Accepted date: 2022-12-26
Online published: 2022-12-27
Supported by
National Natural Science Foundation of China(11972307);Fundamental Research Foundation(JCKY2021204B141)
Active morphing of bat wings can gain high maneuverability and efficiency in low Reynolds number flow， offering a novel aerodynamic design concept for smart aerocraft. Here， the dielectric elastic high polymer material is directly applied to the design of airfoil. A dielectric elastic membrane airfoil with semi-active control function is proposed based on the aero-electro-structural behaviors of dielectric elastic polymer actuators. The dynamic modeling of membrane wings is established according to the thermodynamics theory to describe complex electromechanical behaviors. As for fluid， a high-fidelity aero-electromagnetic-structural coupling model of the membrane wings is established using the high-precision CFD/CSD coupling technique and is verified afterwards. The results show that the lift of the dielectric elastic membrane airfoil under passive control is 12.33% higher than that of the rigid airfoil at an angle of attack of 14°， and that the contribution ratio of the cambered deformation and vibration effect of the airfoil to the lift enhancement is 3∶2. The dielectric elastic membrane airfoil under semi-active control shows a lift enhancement of more than 10% only at a specific voltage. The methods proposed and research conclusions will provide important technical support for aerodynamics and control design of smart aero-vehicles.
Wei KANG , Shilin HU , Yanqing WANG . Lift enhancement mechanism of dielectric elastic membrane airfoil[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(18) : 128318 -128318 . DOI: 10.7527/S1000-6893.2022.28318
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