Annular evaporation tube for miniature engine combustion chamber
An evaporating tube and engine technology, applied in the combustion chamber, continuous combustion chamber, combustion method, etc., can solve problems such as poor effect, achieve the effect of uniform heating, help atomization evaporation, and strong heat storage ability
Inactive Publication Date: 2019-08-02
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
At present, the evaporating tube of the micro-engine combustion chamber usually adopts a straight cylinder or an L-shaped smooth wall structure, which can improve the combustion efficiency, but the effect is poor. The research on the evaporating tube of the micro-engine combustion chamber needs to be improved, and the design of the wall structure of the evaporating tube has great potential. Research space, which will be of great help in improving the performance of the combustion chamber
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[0019] The present invention will be further described now in conjunction with accompanying drawing:
[0020] to combine figure 1 , figure 2 , image 3 , the invention provides a technical solution for the annular evaporating tube of the combustion chamber of the micro-engine. figure 1 It is a schematic diagram of the overall structure of the annular evaporation tube, figure 2 is a schematic cross-sectional view of the central axis of the annular evaporator tube, image 3 It is a schematic diagram of the interior of the annular evaporating tube, Figure 4 It is an enlarged schematic diagram of the porous medium layer (at K) in the annular evaporation tube, Figure 5 It is an enlarged schematic diagram of the small fuel hole (at A) on the inner wall of the annular evaporating tube.
[0021] To sum up the schematic diagram of the structure, the fuel first enters through the small oil delivery hole (6) at the head of the annular evaporator tube (9), and performs prelimina...
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The invention provides an annular evaporation tube for a miniature engine combustion chamber. According to the evaporation tube, fuel oil enters through a small oil-conveying hole of a head part and then passes through a petal-shaped annular channel. Two porous medium layers used for heat storage are arranged in the annular channel, and a small oil-conveying hole is formed in the inner wall surface of the rear part of the annular channel. Part of fuel oil enters into the combustion chamber in advance to organize combustion, and the rest enters the combustion chamber through the tail part. By the structure of the annular evaporation tube, the fuel oil passing through the annular evaporation tube can quickly evaporate into a gas state and can organize combustion better. Moreover, under the condition that the combustion chamber does not have stable vortex, the combustion of fuel in the combustion chamber is more complete. The added porous medium layers have a strong heat storage capacity,can maintain the temperature in the evaporation tube, and contribute to the atomization and evaporation of the fuel.
Description
technical field [0001] The invention relates to the field of micro-engine combustion chambers, in particular to the structural design of the evaporation tube of the micro-engine combustion chamber, so as to effectively improve the atomization and evaporation of fuel in the combustion chamber and improve the combustion efficiency of the combustion chamber. Background technique [0002] With the technical development of MEMS (micro-electromechanical systems), micro-aircraft has become the most attractive product in the field of aerospace. Since the concept of micro-engines appeared in the 1980s, research on micro-engines and related technologies has made great progress. Not a small progress, the micro power system has become a research hotspot at home and abroad in recent years, the current mainstream micro power device is the micro turbojet engine (MTE), which is one of the most promising power at present, with small size, weight Lightweight, high output energy, high density,...
Claims
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IPC IPC(8): F23R3/32
CPCF23R3/32
Inventor 张群曹婷婷杨福正李程镐刘强王鑫海涵张鹏
Owner NORTHWESTERN POLYTECHNICAL UNIV