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Lobe-shaped wave crest for inner beveled or fan-shaped treatment lobe spray pipe

A lobe and peak technology, applied in the field of infrared suppressors, to achieve the effect of small mixing effect, high mixing efficiency, and high mixing efficiency

Inactive Publication Date: 2021-06-29
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to control the weight of the infrared suppressor and reduce the impact of installing the infrared suppressor on the flight performance of military helicopters, the length of the curved mixing tube is often limited. At this time, it is necessary to improve the mixing performance of the lobe nozzle.

Method used

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  • Lobe-shaped wave crest for inner beveled or fan-shaped treatment lobe spray pipe
  • Lobe-shaped wave crest for inner beveled or fan-shaped treatment lobe spray pipe
  • Lobe-shaped wave crest for inner beveled or fan-shaped treatment lobe spray pipe

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Embodiment Construction

[0017] The following will be combined with Figure 1~6 The present invention is described in further detail with embodiment.

[0018] A lobe-shaped crest for a chamfered or fan-shaped treatment lobe nozzle with an inner chamfer or a fan-shaped treatment lobe. Oblique cut treatment) The part of the outer lobe 2 after the cross section extends the lobe-shaped spoiler from the new trailing edge formed at the cut-off place to form the wave-shaped crest 1, and the axial dimension of the lobe-shaped crest is the cut-off part 1.5 to 2.5 times the axial dimension. In this embodiment, it is specifically 2 times.

[0019] As a further improvement of the embodiment of the present invention, the lobe-shaped peak 1 is composed of small wave peaks 3 on both sides, a small wave trough 4 in the middle, and two small side walls 5 connecting the small wave peaks 3 and small wave troughs 4. The two small side walls The included angle is 40°~60°. In this embodiment, the specific angle between...

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Abstract

The invention relates to a lobe-shaped crest for an inner beveled or fan-shaped treatment lobe spray pipe. The part, behind the cross section, of an outer lobe of the inner beveled or fan-shaped treatment spray pipe is cut off through the cross section perpendicular to the axis of the spray pipe, then lobe-shaped spoilers extend out of a new trailing edge formed through the cutting, and lobe-shaped wave crests are formed, and the lobe-shaped wave crests are composed of small wave crests on the two sides, small wave troughs in the middles and two small side walls connecting the small wave crests and the small wave troughs. The lobe-shaped wave crest has the advantages and beneficial effects that the lobe spray pipe with lobe-shaped crests is adopted, and the mixing efficiency is high under the conditions of injection air intake and stamping air intake.

Description

technical field [0001] The invention relates to a lobe-shaped wave crest used for in-band oblique cutting or fan-shaped processing lobe nozzle, and the in-band oblique cutting or fan-shaped processing lobe nozzle adopting lobe-shaped wave crest can be used as an infrared suppressor for military helicopters, It belongs to the field of aviation technology. Background technique [0002] Military helicopters can suppress the infrared radiation generated by the power plant by installing infrared suppressors, so as to improve the infrared stealth performance, thereby improving the battlefield survivability of military helicopters. The main body of the infrared suppressor is a lobe mixer composed of a lobe nozzle and a curved mixing tube. The exhaust device of the helicopter turboshaft engine uses a lobe nozzle, and the high-speed hot exhaust flow flows through the lobe nozzle to form an ejection effect on the surrounding atmosphere. The high-speed hot exhaust flow and the ejecte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K1/82F02K1/38
CPCF02K1/825F02K1/386
Inventor 盛志强但誉张澜胡晓安
Owner NANCHANG HANGKONG UNIVERSITY
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