Opposite spraying evaporating pipe of minitype engine combustor
An evaporating tube and engine technology, applied in the combustion chamber, continuous combustion chamber, combustion method, etc., can solve the problems of large surface-to-volume ratio, small characteristic size, large heat dissipation loss, etc., and achieve performance improvement, good fuel atomization, and good ignition. performance effect
Inactive Publication Date: 2018-06-12
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology
The design of the micro-combustion chamber is the key link and the most important part of the micro-turbine engine. Compared with the conventional-scale combustion chamber, this type of combustion chamber has the characteristics of small characteristic size and large surface-to-volume ratio, resulting in short airflow residence time and heat loss. large, resulting in the appearance of combustion instability
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[0015] The present invention will be further described now in conjunction with accompanying drawing:
[0016] combine figure 1 , The invention provides a new micro-engine combustor-to-spray evaporator tube that can effectively improve fuel evaporation atomization and enhance ignition performance. figure 1 It is a schematic diagram of the three-dimensional structure of the evaporation tube of the micro-combustion chamber with a counter-injection structure, figure 2 It is the front view of the evaporation tube structure of the micro-combustion chamber. The combustion chamber is the core component of the micro-engine. The micro-engine is small in size, compact in structure, not easy to flow and burn, and the combustion residence time is short, on the order of a few milliseconds. The formation of multiple recirculation zones has a significant effect on enhancing fuel atomization, promoting oil-gas mixing, and enhancing ignition performance.
[0017] At present, the fuel atomiz...
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The invention provides a design scheme of an opposite spraying evaporating pipe of a minitype engine combustor. Mixing of fuel oil and air can be effectively enhanced, the ignition performance of thecombustor is enhanced, the mixed gas standing time is prolonged, and the fuel oil evaporation atomization effect is improved. When opposite spraying evaporating pipes oppositely spray mixed gas, a plurality of recirculation zones are formed in a flame tube cavity, the mixed gas which is not sufficiently atomized in the evaporating pipes is further subjected to evaporation atomization after entering the recirculation zones, and by means of the mixed gas which is atomized well, the combustion efficiency can be effectively improved. Meanwhile, the mixed gas standing time in the combustor is prolonged, combustion is more sufficient, the gas flow temperature is raised to a certain degree, and evaporation atomization of the fuel oil in the evaporating pipes is promoted. Due to the existing of the recirculation zones, flames are more stable in the combustor, and the adaptive capacity of an engine to the environment is enhanced.
Description
technical field [0001] The invention belongs to the field of micro-engine combustion chambers, and in particular relates to a design of a novel evaporation tube which can effectively improve the fuel atomization and evaporation effect in the combustion chamber, thereby improving the combustion efficiency in the micro-combustion chamber. Background technique [0002] Micro power system has become a research hotspot at home and abroad in recent years, among which micro turbine engine is one of the most promising power, with the advantages of small size, light weight, large output energy and high density. The design of the micro-combustion chamber is the key link and the most important part of the micro-turbine engine. Compared with the conventional-scale combustion chamber, this type of combustion chamber has the characteristics of small characteristic size and large surface-to-volume ratio, resulting in short airflow residence time and heat loss. large, leading to the occurre...
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IPC IPC(8): F23R3/32
Inventor 张群王鑫张鹏海涵宋亚恒李承钰寇睿
Owner NORTHWESTERN POLYTECHNICAL UNIV