A Synergetic Jet Secondary Nozzle Circulation Control Airfoil

Abstract

The invention discloses a cooperative jet type secondary nozzle circulation control airfoil, which comprises an airfoil main body, a jet hole is arranged at the negative pressure area of ​​the leading edge of the upper airfoil of the airfoil main body, and a jet hole is arranged at the high pressure area of ​​the trailing edge of the upper airfoil. The suction hole, the trailing edge flap of the airfoil body is set as an arc surface, and the arc surface is equipped with a primary nozzle and a secondary nozzle; the flow control method of "equal blowing and suction" is formed through the jet hole and the suction hole ;The trailing edge flap is set as a circular arc surface, and the modified shape is an arc-shaped Coanda trailing edge, which produces the Coanda effect. The trailing edge flap is provided with a primary nozzle and a secondary nozzle to push the boundary layer separation point back. At the same time, the blowing airflow produces a "wrapping" effect on the outflow, so that the flow around the airfoil generates a large amount of circulation, thereby obtaining high lift; the absolute value of the lift increase of the airfoil in this scheme increases, and the resistance decreases. The wall effect is obvious, which improves the stall angle of attack, greatly improves the efficiency of increasing lift and reducing drag, and the overall performance is a significant increase in the lift-to-drag ratio.

Description

technical field [0001] The invention relates to the technical field of aviation airfoils, in particular to a cooperative jet type secondary nozzle circulation control airfoil. Background technique [0002] Over the past hundred years, with the rapid development of the aviation industry, aircrafts have been widely used in various fields. For example, in the military, it can be used for reconnaissance and surveillance, communication relay, electronic countermeasures, etc.; in civilian use, it can be used for geodesy, environmental monitoring, etc.; in scientific research, it can be used for atmospheric research, sampling and monitoring of nuclear, biological and chemical contaminated areas Wait. With the expansion of the application field of aircraft, there is an increasing demand for aircraft with simple structure, easy control, high space utilization, stable flight, and high aerodynamic efficiency. [0003] However, in the development of traditional aviation technology, me...

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Problems solved by technology

[0006] Aiming at the above-mentioned problems in the prior art, the present invention provides a synergistic jet-type secondary nozzle circulation control airfoil, which solves the problem that the traditional airfoil needs to increase the total pressure in the cavity to obtain a higher lift in order to improve lift. The speed of the airflow at the nozzle will cause the ejected jet to be blocked at the nozzle, which will greatly reduce the efficiency of the injection, which is not conducive to the performance control of the circulation control airfoil

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