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A Flexible Sheet Type Direct-Current Nozzle with Large Flow Range

A sheet-type, high-flow technology, which is applied to ramjet engines, combustion methods, lighting and heating equipment, etc., can solve the problems of limited flow range of single-channel fuel flow and cannot adapt to the requirements of engine fuel flow change range, etc., to achieve Improving performance and working stability, simple structure, and the effect of suppressing flow fluctuations

Active Publication Date: 2020-08-18
XIAN AEROSPACE PROPULSION INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the limitation of the existing single-channel fuel flow range, which cannot meet the requirements of the engine for the fuel flow range change, and provide a flexible sheet type direct-flow nozzle with a large flow range

Method used

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  • A Flexible Sheet Type Direct-Current Nozzle with Large Flow Range
  • A Flexible Sheet Type Direct-Current Nozzle with Large Flow Range
  • A Flexible Sheet Type Direct-Current Nozzle with Large Flow Range

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as figure 1 , figure 2 with image 3 As shown, the present embodiment provides a flexible sheet type DC nozzle with a large flow range, including a cylindrical nozzle body 1 with a circular cross section, one end of the nozzle body 1 is an opening, and the other end is fixedly arranged to completely cover the nozzle body 1 The flexible sheet 2 on the end face; the nozzle body 1 and the sheet 2 are made of spring steel.

[0035] The thickness of the thickest part of the sheet 2 is 0.2 mm, and the thickness of the sheet 2 decreases linearly from the edge of the sheet 2 to the geometric center of the sheet 2 . An injection groove 3 for passing fuel is arranged on the sheet 2 .

[0036] The injection groove 3 is an S-shaped curve, and the injection groove 3 divides the slice 2 into two parts with the same semicircle shape, and each part of the slice 2 is in the shape of a cantilever.

[0037] The groove width of the injection groove 3 is 0.2 mm. Crack relief hole...

Embodiment 2

[0041] Such as Figure 4 , Figure 5 with Image 6 As shown, the present embodiment provides a flexible sheet type DC nozzle with a large flow range, including a cylindrical nozzle body 1 with a circular cross section, one end of the nozzle body 1 is an opening, and the other end is fixedly arranged to completely cover the nozzle body 1 The flexible sheet 2 on the end face; the nozzle body 1 and the sheet 2 are made of spring steel.

[0042] The thickness of the thickest part of the sheet 2 is 0.15 mm, and the thickness of the sheet 2 decreases linearly from the edge of the sheet 2 to the geometric center of the sheet 2 . Two injection grooves 3 for fuel passing are arranged on the sheet 2 .

[0043] The two injection grooves 3 intersect in a cross shape, and the intersection point is located at the geometric center of the sheet 2; the injection grooves 3 evenly divide the sheet 2 into four parts, and each part of the sheet 2 is in a cantilever shape. The groove width of t...

Embodiment 3

[0046] This embodiment provides a flexible sheet type DC nozzle (not shown) with a large flow range, which includes a cylindrical nozzle body 1 with a circular cross section. One end of the nozzle body 1 is an opening, and the other end is fixedly arranged to completely cover the nozzle. The flexible sheet 2 on the end face of the body 1; the materials of the nozzle body 1 and the sheet 2 are all spring steel.

[0047] The thickness of the thickest part of the sheet 2 is 0.3 mm, and the thickness of the sheet 2 decreases linearly from the edge of the sheet 2 to the geometric center of the sheet 2 . Four injection grooves 3 for the passage of fuel are arranged on the sheet 2 .

[0048] The four injection grooves 3 intersect to form a P-shaped shape, and the intersection point is located at the geometric center of the sheet 2 . The spout 3 evenly divides the slice 2 into eight parts, and each part of the slice 2 is in the shape of a cantilever. The groove width of the injectio...

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Abstract

The invention relates to a direct current nozzle, and provides a flexible sheet type direct current nozzle with a large flow range, which aims at solving the shortcomings that an existing single-channel fuel oil line has a limited range of flow rate variation and cannot meet the requirements of an engine on the range of flow rate variation of fuel oil. The direct current nozzle comprises a nozzlebody, wherein the nozzle body has an opening at one end; a flexible sheet which completely covers the end surface of the nozzle body is fixedly arranged at the other end of the nozzle body; at least one injection groove for passing of fuel oil is formed in the sheet; the sheet is divided into at least two parts by the injection groove; and each part of the sheet is cantilevered. A fuel oil deviceprovided with the nozzle can reduce the shunting of fuel oil, and even can use only one fuel line; and the direct current nozzle effectively simplifies a fuel oil regulation system and causes the engine to work stably and reliably.

Description

technical field [0001] The invention relates to a direct-flow nozzle, in particular to a flexible sheet-type direct-flow nozzle with a large flow range. Background technique [0002] A supersonic cruise missile powered by a liquid subcombustible ramjet engine has a large flight space and a wide range of flight Mach numbers, requiring a wide range of engine fuel flow changes. When designing the combustion chamber, in order to ensure the spray quality, the minimum injection pressure drop is generally limited; the engine system is limited by the power and structural strength, and the maximum injection pressure drop is also limited. Therefore, the flow range of the single fuel line is limited and cannot meet the requirements of the engine for the change range of the fuel flow. [0003] To solve this problem, the traditional ramjet fuel device designs the fuel circuit into multiple channels, and realizes a wide range of fuel flow changes by opening or closing part of the fuel ci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/28F02K7/10
CPCF02K7/10F23R3/28
Inventor 许军民高超周杰陈开拓梁俊龙穆杨杨振鹏
Owner XIAN AEROSPACE PROPULSION INST
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