Blow/suction control method of flow separation on control surface of airplane

A control method and flow separation technology, applied in the aerospace field, can solve problems such as large gas consumption, difficult implementation, and affecting system efficiency

Inactive Publication Date: 2011-04-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the above chordwise blowing methods have good control effects, they all seriously affect the efficiency of the propulsion system due to the huge air consumption, and there is still

Method used

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  • Blow/suction control method of flow separation on control surface of airplane
  • Blow/suction control method of flow separation on control surface of airplane
  • Blow/suction control method of flow separation on control surface of airplane

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Embodiment Construction

[0014] The purpose of the present invention is to provide a method for controlling the separation flow of the rudder surface by means of blowing / suction. The present invention can eliminate the flow separation on the surface of the rudder surface with a small amount of air blowing or air suction by controlling the blowing / suction on the surface of the rudder surface, thereby improving the control efficiency of the rudder surface and improving the longitudinal and lateral control of the aircraft. stable characteristics. The specific technical scheme is as follows:

[0015] Step 1: Determine the location of the flow separation point on the rudder surface

[0016] Through the pressure measurement experiment, the pressure distribution curve of the control rudder surface under the large rudder deviation can be obtained. The surface pressure distribution of the rudder surface in the separated state is a platform area. The characteristic of the platform area is that the pressure coe...

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Abstract

The invention discloses a method for controlling the flow separation on the control surface of an airplane by using a blow/suction manner. The method comprises the steps of: arranging a blow/suction gap near a flow separation point at the front edge of the upper surface of the control surface, wherein the blow/suction gap is distributed in the span direction; and arranging a suction gap at the back edge of the upper surface of the control surface, so as to carry out control by single blow or single suction or combined blow and suction according to different conditions. According to the method, the separation can be eliminated by using small blow capacity or suction capacity, the control efficiency of the control surface is increased, and the longitudinal and transverse control stability of the airplane is improved, and obvious influence to an engine power propulsion system does not generate.

Description

technical field [0001] The invention relates to a method for controlling the separated flow of an aircraft control rudder surface in a blowing / suction mode, and belongs to the technical field of aerospace. Background technique [0002] Various rudder surfaces are generally used as the main means of flight control on modern aircraft, but the airflow separation that occurs at large deflection angles of the rudder surfaces will reduce the effectiveness of the rudder surfaces and seriously affect the control characteristics of the aircraft. At present, the control method of chord blowing has been applied to the separation flow control of rudder surfaces, among which blowing flaps and jet flaps are typical representatives. [0003] Blowing flap technology is to place the deflected flap directly downstream of the high-speed jet flow of the engine to obtain high lift. The high-speed jet of the engine blows away the separated airflow, and increases the circulation to the airfoil, s...

Claims

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Application Information

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IPC IPC(8): B64C21/02
Inventor 邓学蓥王延奎吴鹏张延辉马宝峰李岩
Owner BEIHANG UNIV
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