ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Trailing edge deformation matrix aerodynamic design for long-range civil aircraft variable camber wing
Received date: 2022-04-28
Revised date: 2022-06-01
Accepted date: 2022-07-22
Online published: 2022-08-03
Supported by
National Level Project
Aerodynamic optimization research on the trailing edge deformation matrix is conducted for the long-range civil aircraft variable camber wing. Geometric parameterization of the deformation shape is determined in combination with the features of knuckle deformation structures，and the aerodynamic optimization design process of the trailing edge deformation matrix is established considering deformational coupling constraints on the basis of surrogate-based optimization algorithm. The deformation matrix for cruise flight profile characterized by lift step variations，and the deformation matrix for non-cruise flight profile composed of the buffeting point and drag divergence point are then obtained. The results show that：the drag reduction benefit of trailing edge deformation for cruise flight profile increased while the lift variation relative to the base point increased，and that the drag reduction quantity in a high lift state is about 7-8 times that in a low lift state. The key to trailing edge deformation drag reduction is to adjust the pressure distribution of the main wing. Since it is not sensitive to the deflection angle of deformation shape control sections，considering deformational coupling constraints has no remarkable impact on drag reduction benefit. Additionally，the step deformation matrix with the same deflection law of the trailing edge deformation shape，a linear corresponding relationship between the deflection angle and design lift，and obvious drag reduction benefit does exist. For the non-cruise flight profile deformation matrix，significant regularity is found from trailing edge deformation as that of cruise flight profile deformation matrix，and the trailing edge shape deformation can effectively reduce the shock wave intensity at the buffeting point，but not for the drag divergence point.
Chunpeng LI , Zhansen QIAN , Xiasheng SUN . Trailing edge deformation matrix aerodynamic design for long-range civil aircraft variable camber wing[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(7) : 127335 -127335 . DOI: 10.7527/S1000-6893.2022.27335
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