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An evaporating tube type compact combustion chamber

A technology of evaporating tubes and combustion chambers, which is applied in the field of combustion systems of micro-miniature aero-engines, can solve the problems of low air film coverage, limited cooling effect, and large flow loss, and achieve optimized jet flow field, improved efficiency, and stable combustion Effect

Active Publication Date: 2019-11-26
NAT INST CORP OF ADDITIVE MFG XIAN
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

see figure 1 , under the action of mainstream pressure and friction in the traditional cylindrical air film hole, the jet bends and covers the surface of high-temperature components, forming a cold air film with a lower temperature, which separates the high-temperature gas from the wall surface, and plays the role of heat insulation and cooling, but The flow loss is large, the air film coverage is low, and the jet flow is easy to be generated at a high blowing ratio and detached from the wall, and the cooling effect is limited

Method used

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  • An evaporating tube type compact combustion chamber
  • An evaporating tube type compact combustion chamber
  • An evaporating tube type compact combustion chamber

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0035] see figure 2 and image 3 , the invention discloses an evaporating tube type compact combustion chamber; the combustion chamber includes an outer wall 5 and an inner wall 6, both of which are cylindrical structures, and the diameter of the cylindrical barrel formed by the inner wall 6 is smaller than that of the cylindrical barrel formed by the outer wall 5 The diameter of the barrel, the height of the cylindrical barrel formed by the inner wall 6 is smaller than the height of the cylindrical barrel formed by the outer wall 5, the front end of the outer wall 5 and the front end of the inner wall 6 are connected by a curved wall surface 3, the curved wall surface 3 protrudes to the outside, and the curvature of the curved wall surface 3 2π / 3~π, that is, the degree of the curved wall surface 3 is 120°~180°, so that the incoming air fits t...

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Abstract

The invention discloses an evaporating pipe type compact combustion chamber. The inner wall and outer wall of the combustion chamber and an evaporating pipe are integrally formed, so that the weight is lowered, the overall dimensions are reduced and the whole performance is improved. Inner air film holes and outer air film holes are formed in the inner wall and the outer wall of the combustion chamber separately and are both divergent air film holes, namely the hole area of the inner air film holes and the outer air film holes in one side of a flame tube is greater than that of the inner air film holes and the outer air film holes in the other side of the flame tube. Accordingly, the surficial area of the inner wall surface of the flame tube is increased, wall surface heat transfer is intensified, flow field homogeneity is optimized, combustion efficiency is improved, the temperature distribution coefficient of a combustion chamber outlet is decreased and pollutant emission is reduced.

Description

【Technical field】 [0001] The invention belongs to the field of combustion systems of miniature aero-engines, and in particular relates to an evaporation tube type compact combustion chamber. 【Background technique】 [0002] Combustion chambers with evaporator tube structures are widely used in aero-engines and ground gas turbine combustion chambers, especially micro-miniature power equipment. A lot of research work has been done on micro-miniature engines abroad, and mature models of various magnitudes have been produced accordingly, forming corresponding military and civilian markets. The combustion chamber adopting the evaporation tube scheme has the advantages of simple structure, easy processing, low cost and good comprehensive combustion performance. The weight and volume of the combustion chamber itself are an important limitation on the performance of the aircraft. It is an important design direction to reduce the weight and volume while retaining the advantages of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23R3/32F23R3/10
CPCF23R3/10F23R3/32
Inventor 张琦眭晓蔚代赟杨红伟袁元园卢秉恒
Owner NAT INST CORP OF ADDITIVE MFG XIAN
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