Ultrasonic-assisted hot air combined anti-icing device for aircraft airfoil

Abstract

The invention discloses an airplane airfoil ultrasonic-assistant hot air combined ice preventing and removing device which comprises an airfoil outer skin, a hot air ice preventing and removing system, an ultrasonic high-frequency oscillating auxiliary device, a program controller, an atmosphere temperature sensor and an icing strength annunciator, wherein the atmosphere temperature sensor is used for detecting external atmosphere temperature; the icing strength annunciator is used for detecting the outer surface ice layer thickness of the airfoil outer skin; the hot air ice preventing and removing system comprises an engine gas compressor, an airfoil ice preventing cavity, an empennage ice preventing cavity and an ice preventing and removing hot air delivery device; the ultrasonic high-frequency oscillating auxiliary device comprises an ultrasonic generator and an ultrasonic energy converter unit which is connected with the output end of the ultrasonic generator by a connecting cable; and the program controller is used for automatically controlling connection and disconnection of the ice preventing and removing hot air delivery device and starting and closing of the ultrasonic generator according to a temperature signal and an icing strength signal. Accordingly, the airplane airfoil ultrasonic-assistant hot air combined ice preventing and removing device can be used for effectively removing the ice layers of middle airplane body and empennage front edges of an airplane during flight in real time and has the advantages of short ice removing time, low energy consumption, safe and reliable system and thorough ice removal.

Description

technical field [0001] The invention relates to an anti-icing device, which is mainly used for anti-icing and anti-icing at the leading edge of the wing / tail of an aircraft, and belongs to the field of aircraft anti-icing and deicing. Background technique [0002] Icing is one of the main causes of aircraft flight accidents, especially the icing on the leading edge of the wing and tail of the aircraft, which will lead to increased airfoil resistance, decreased lift, reduced critical angle of attack, and deterioration of maneuverability and stability , especially can cause the controllability of the aircraft under the take-off and landing state to be out of control, thus causing serious flight accidents. [0003] For the anti-icing of wings and tails during flight, hot air anti-icing technology is widely used at present: that is, during the flight, the hot air drawn from the compressor of the aircraft engine is used to melt the ice. Although this hot gas anti-icing technolog...

AI Technical Summary

Problems solved by technology

Although this hot gas anti-icing technology can prevent and deicing to a certain extent, it takes a long time to deicing and consumes a lot of energy. At the same time, due to its large thermal inertia, it is easy to form ice lumps behind the heating area.

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