High-performance low-Reynolds-number tandem laminar flow airfoil profile based on joined wing layout unmanned aerial vehicle

Abstract

The invention relates to the field of aerospace, and discloses a high-performance low-Reynolds-number tandem laminar flow airfoil profile based on a joined wing layout unmanned aerial vehicle. The profile comprises a tandem laminar flow airfoil profile, and the tandem laminar flow airfoil profile comprises a front airfoil profile and a rear airfoil profile, the front airfoil profile has a plurality of different front airfoil profile geometric characteristics and a plurality of different front airfoil profile pressure distribution form characteristics, and the rear airfoil profile has a plurality of different rear airfoil profile geometric characteristics and a plurality of different rear airfoil profile pressure distribution form characteristics. According to the invention, the requirement that a large-aperture radar with 360-degree omnidirectional detection capability is integrated in a wing surface of a joined wing layout sensor aircraft is met; within a wide lift coefficient range near a design working condition, the method has extremely high laminar transition and laminar separation bubble development robust control capability, also has a high lift characteristic, and has low aerodynamic resistance, high cruise lift-drag ratio and cruise efficiency factors within the wide lift coefficient range.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a high-performance low Reynolds number series laminar flow airfoil based on a joint-wing layout UAV. Background technique [0002] Integrate sensor systems including radar into high-altitude long-endurance unmanned platforms, and develop high-performance sensor UAV (Unmanned Aerial Vehicle), which has great application prospects in the future military and civilian fields, such as communication relays and monitoring time-sensitive targets , reconnaissance, etc. [0003] Linked / Box Wing Layout The front and rear wings of the unmanned platform are linked together directly or indirectly through longitudinal members to form a closed ring structure. The characteristics of the joint wing layout make it possible to integrate a large-aperture radar with 360° omnidirectional detection capability in the wing plane, and at the same time, it has more aerodynamic rudder surface layout area...

AI Technical Summary

Problems solved by technology

The laminar flow airfoil design with low Reynolds number and high lift-drag ratio has always been the key and difficult point in the aerodynamic design of UAVs at high altitude and long endurance. The design difficulty of laminar airfoil is coupled, which increases the difficulty of airfoil design suitable for joint / box wing layout

At the same time, the existing literature on low Reynolds number and high lift-to-drag ratio laminar airfoils does not consider the aerodynamic interference of the front and rear wings, and cannot be applied to the layout of the joint / box wing

Images