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Quick wing tip vortex weakening apparatus

A wingtip vortex, fast technology, applied in the directions of wings, transportation and packaging, aircraft parts, etc., can solve problems such as flight safety hazards, and achieve the effects of accelerated dissipation, stable operation, and convenient maintenance.

Active Publication Date: 2008-12-10
CHINA ACAD OF AEROSPACE AERODYNAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Fixed-wing aircraft will generate high-intensity wingtip vortices during flight, and the wingtip vortex will dissipate in the atmosphere where the aircraft flies for a long time before disappearing, so the wingtip vortex will affect the aircraft that fly through this area again. Flying with cluster formation brings a very large flight safety hazard, and at the same time, the generation of the wingtip vortex will bring a lot of induced resistance to the aircraft itself

Method used

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  • Quick wing tip vortex weakening apparatus
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Embodiment Construction

[0010] Such as figure 1 As shown, a fast weakening device for wingtip vortex is the trailing edge sawtooth structure 2 of the winglet 1 of the fixed-wing aircraft wing. The side high-speed airflow and low-speed airflow quickly mix after passing through the sawtooth device, and the wingtip vortex formed by the airflow is broken into small-scale vortices 3, which can be quickly dissipated to achieve the purpose of quickly weakening the wingtip vortex. The device can be made of rigid, elastic or flexible material.

[0011] The invention carries out numerical simulation on the vortex behind the winglet, and can carry out numerical research on the wingtip vortex problem of the winglet by solving the compressible Navier-Stokes equation.

[0012] For the model equation

[0013] ∂ U ∂ t + ∂ F ∂ x ...

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Abstract

The invention relates to a wingtip vortex fast weakening device which designs the back edge of an alula at the wingtip of an airfoil into a sawtooth structure and leads the sawtooth structure to be parallel with the back edge of the alula at the wingtip. The structure of the invention is simple and is improved based on the original alula structure at the wingtip, which can not bring any additional quantity to an airplane. Simultaneously, the invention runs stably, does not need to be provided with power when running and is convenient for being maintained. The wingtip vortex fast weakening device of the alula at the wingtip in the sawtooth shape of the back edge designed by the invention has physical characteristic scales of the wingtip vortex, can speed up and induce the mixing between a high speed air flow and a low speed air flow generated by the wingtip vortex and can lead the wingtip vortex to fast break into a vortex with a small scale, thus achieving the effect of speeding up the dissipation of the wingtip vortex and fast weakening the wingtip vortex.

Description

technical field [0001] The invention relates to a wingtip vortex rapid weakening device, in particular to a wingtip vortex rapid weakening device for a trailing edge serrated winglet. Background technique [0002] Fixed-wing aircraft will generate high-intensity wingtip vortices during flight, and the wingtip vortex will dissipate in the atmosphere where the aircraft flies for a long time before disappearing, so the wingtip vortex will affect the aircraft that fly through this area again. Flying with cluster formation brings a very large flight safety hazard, and at the same time, the generation of the wingtip vortex will bring a lot of induced resistance to the aircraft itself. In order to solve this problem, large European and American aircraft manufacturing companies (such as Boeing and Airbus, etc.) often adopt the technical solution of winglets to reduce the problems caused by wingtip vortex. Good solution, but the presence of winglets does not allow the wingtip vortex...

Claims

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Application Information

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IPC IPC(8): B64C3/00
Inventor 沈清关发明纪锋
Owner CHINA ACAD OF AEROSPACE AERODYNAMICS
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