Experimental device for fuel combustion and soot generation characteristics under microwave radiation

Abstract

The invention belongs to the related technical field of energy conservation and emission reduction of engines, and discloses an experimental device for fuel combustion and soot generation characteristics under microwave radiation. The experimental device comprises a high-voltage power supply, a signal generator, a magnetron, a tuner, a combustion chamber, an axial flow combustor and a capillary tube, the magnetron is used for generating microwaves, and the tuner is used for adjusting impedance in a circuit; the combustion chamber is a closed metal cavity; the axial flow combustor is used for generating axial flame in the combustion chamber; the capillary tube is arranged in the flame, small holes are formed in the capillary tube, substances in the flame at the position of the capillary tube are sucked into the small holes under the action of negative pressure and then enter a gas analyzer, components of the substances in the flame are obtained under the analysis of the analyzer, the position of the capillary tube in the flame is adjusted, the analysis of combustion products at different positions is achieved, and the comprehensive detection of the combustion products is achieved. By means of the device, the detection of the intermediate product in the combustion process is achieved, and the device is easy to operate, capable of saving energy, environmentally friendly, safe andreliable.

Description

technical field [0001] The invention belongs to the technical field related to engines, and more specifically relates to an experimental device for combustion and soot generation characteristics of microwave assisted combustion. Background technique [0002] With the increase of the number of engines, the engine has become one of the most important fossil energy consumption products, and the main component of the particulate matter in the engine exhaust is soot particles, which has brought serious harm to the human environment. Therefore, how to improve the combustion efficiency of the engine while reducing the emission of harmful substances is particularly important for the further development of the engine. [0003] On the one hand, common engine energy-saving and emission-reduction strategies include lean burn and exhaust gas recirculation technologies, both of which essentially dilute the mixture of fuel and air. However, when the dilution ratio is too large, it will re...

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Problems solved by technology

In addition, since the patent CN 106762330 B is aimed at the visualization of the ignition transient process, it is not conducive to the diagnosis of fuel combustion and soot generation process; in the past, engineers usually use the form of steady-state axial flow flame to carry out the fuel combustion soot generation process For the basic research work, the probe is used to go deep into the axial flow flame to condense part of the soot on the probe, and the soot generation at different positions can be obtained by changing the height of the probe

The advantage of this method is that it is convenient, quick, and cheap, but because the combustion reaction does not stop during the probe sampling process, it is difficult to collect the intermediate substances in the soot generation process, so it will bring certain problems to the subsequent analysis. Difficult, with the development of laser diagnostic technology, researchers use laser-induced fluorescence technology, laser-induced incandescent technology, etc. to diagnose axial flow flames. This method of diagnosis can more accurately detect the intermediate substances in the process of soot generation However, the price of the laser diagnostic device is relatively high, and when studying the influence of the electromagnetic field on the soot generation process, the laser energy will bring additional influence to the electromagnetic field, which will affect the combustion analysis under the electromagnetic field. Causes interference, so it is only used for basic research on conventional axial flow flames

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