A helicopter rotor anti-icing/deicing method using spraying nozzles to spray icing condensation nuclei and deicing fluid

A technology for helicopter rotors and jet heads, which is used in deicing devices, aircraft parts, transportation and packaging, etc., can solve the problems of less anti-icing/deicing technology, and achieve the effects of less pollution, improved utilization, and reduced pollution

Active Publication Date: 2017-10-13
BEIHANG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing helicopter rotors mainly perform anti-icing / de-icing work by means of electric heating and hot air, and there are few relatively mature anti-icing / de-icing technologies

Method used

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  • A helicopter rotor anti-icing/deicing method using spraying nozzles to spray icing condensation nuclei and deicing fluid
  • A helicopter rotor anti-icing/deicing method using spraying nozzles to spray icing condensation nuclei and deicing fluid
  • A helicopter rotor anti-icing/deicing method using spraying nozzles to spray icing condensation nuclei and deicing fluid

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with the accompanying drawings.

[0028] Such as figure 1 The structure of the anti-icing / de-icing nozzle shown is an air-liquid two-way nozzle. The upper part of the nozzle is a hemispherical structure, and the lower part is a casing structure; the hemispherical structure can spray high-pressure engine exhaust gas mixed with carbon powder, and the casing structure has nozzles to spray the engine. For the deicing fluid heated by exhaust gas, in order to ensure the injection range, the cross-sectional size of the gas channel inside the hemispherical structure is designed to gradually decrease from the inside to the outside, thereby increasing the speed at the nozzle on the surface of the hemisphere and increasing the spraying range; anti-icing nozzle casing In the structure, the inner pipe and the outer pipe are equipped with external threads for connecting pipelines, which is convenient for connecting ...

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Abstract

The invention relates to a helicopter rotor ice preventing / removing method for spraying freezing condensation nucleuses and deicing liquid through injector heads. The method mainly comprises the steps that 1, the injection heads are arranged within the rotor freezing protection range; 2, a corresponding pneumatic circuit for guiding engine tail gas and a hydraulic circuit for spraying the deicing liquid are mounted in a rotor and on the upper portion of an engine; 3, the pneumatic circuit is started under the condition of light freezing, and the carbon powder condensation nucleuses are sprayed through the injector heads for ice prevention; 4, the pneumatic circuit and the hydraulic circuit are started at the same time under the conditions of moderate freezing and heavy freezing, the carbon powder condensation nucleuses are sprayed through the injector heads for ice prevention, and the deicing liquid heated by a heat exchanger is sprayed for deicing of the rotor. The sprayed carbon powder serves as the freezing condensation nucleuses to freeze supercooled water drops in advance to achieve the aim of ice prevention. Under the conditions of moderate freezing and heavy freezing, the heated deicing liquid is sprayed to prevent or remove accumulated rotor ice, and the requirement for ice prevention and removal of the rotor under multiple different freezing states can be met.

Description

technical field [0001] The invention relates to a helicopter rotor anti-icing / deicing method using a spray head to spray icing condensation nuclei and deicing fluid, and belongs to the technical field of rotor anti-icing and deicing. Background technique [0002] When the rotor of a helicopter encounters a cloud layer containing supercooled water droplets at high altitude, icing will occur on the windward surface of the rotor. When the icing is severe, it may even cause a flight accident of the helicopter. Existing helicopter rotors mainly perform anti-icing / de-icing work by means of electric heating and hot air, and relatively mature anti-icing / de-icing technologies are few. Therefore, it is of great significance to study new fast and efficient anti-icing and de-icing technologies for helicopter rotors. [0003] Supercooled water droplets refer to water droplets whose temperature is lower than zero but still in a liquid state. Studies have found that supercooled water drop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64D15/02
CPCB64D15/02
Inventor 张以都陈龙吴琼宋晶周文兵
Owner BEIHANG UNIV
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