A device for research on microwave-assisted steady-state premixed combustion

Abstract

The invention belongs to the related field of new combustion technology, and discloses a device for microwave-assisted steady-state premixed combustion research. The device includes an integrated burner system, an air supply system and a microwave system, wherein: The system delivers fuel; the integrated burner system includes a burner body with a precision metal mesh at the lower part; the microwave system includes a microwave generator, a microwave transmission line and an antenna, and the antenna is set inside the burner body coaxially with the burner body; the antenna Including the antenna inner conductor and the antenna head, the antenna head protrudes from the burner body and is located near the flame front generated by the burner body. This application can realize multi-parameter adjustable microwave-assisted steady-state combustion in an open space, which is convenient for arranging other combustion diagnosis equipment. At the same time, the design of the steady-state burner reduces the cost of combustion diagnosis. Auxiliary combustion offers the possibility.

Description

technical field [0001] The invention belongs to the related field of novel combustion technology, and more specifically relates to a device for microwave-assisted steady-state premixed combustion research. Background technique [0002] With the prosperity and development of the world economy and the increasing level of industrialization, the demand for energy is increasing day by day. Internal combustion engines are widely used in transportation, aerospace and other fields due to their advantages such as high thermal efficiency, high power density, and wide power range. To achieve energy saving and emission reduction on internal combustion engines, we must first solve the problem of how to improve the combustion efficiency of internal combustion engines to improve energy utilization and reduce harmful exhaust emissions after combustion. Since hypersonic propulsion technology requires fuel combustion under supersonic flow conditions, it is extremely important to achieve suff...

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Problems solved by technology

[0003] However, the interaction relationship between microwave and flame plasma, the influence mechanism of microwave parameters on flame, and the mechanism of microwave-assisted combustion are still unclear. Therefore, it is necessary to design a test bench for studying microwave-assisted steady-state premixed combustion. , in order to use advanced diagnostic methods to diagnose and observe the microwave-assisted combustion process, and provide a large amount of basic data for the high-efficiency, finished products, and industrialization of microwave-assisted combustion. In the current research on microwave-assisted combustion, Chinese patent CN2937841Y provides a A microwave plasma burner, through the resonant effect of microwaves inside the microwave resonant cavity, breaks down the mixture gas and forms a space ignition, but because the microwave resonant cavity is used, the burner is located inside the resonant cavity, so it is difficult to realize visual research. The measurement of parameters such as the combustion speed of the flame and the law of emission generation cannot be realized. On the other hand, the structural design of the resonant cavity is complicated, time-consuming and labor-intensive, and is not suitable for in-depth research on the mechanism of microwave-assisted combustion.

Chinese patents CN106762330B and CN107290133B respectively provide two kinds of visual experiment systems for studying microwave ignition, but these two patents are based on ignition experimental research, focusing on the transient process of ignition. The transient response requirements of the microwave oven are harsh, resulting in the lack of fast-response diagnostic equipment or the high price of diagnostic equipment, which limits the in-depth study of the microwave-assisted combustion process

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