Method and device for detecting performance of porous medium burner

Abstract

The invention discloses a method for detecting the performance of a porous medium burner. The method comprises the following steps: building a mathematical model about a premixing burning process in the porous medium burner; wherein a mathematical model about a radiation heat exchange process formed by premixing burning is built by a diffusion approximation process and a double-flux process; acquiring the structural parameters of the to-be-detected porous medium burner; simulating the premixing burning process in the to-be-detected porous medium burner; comparing a simulating result with preset performance indexes, and detecting the burning performance of the to-be-detected porous medium burner. Besides, the invention further discloses a device for detecting the performance of the porous medium burner. The burning performance indexes of the porous medium burner in the premixing burning process are obtained and compared with the preset performance indexes, and detecting and verifying purposes can be achieved. The radiation heat exchange process is simulated through the combination of the diffusion approximation process and the double-flux process, so that the detecting result is more accurate and reliable.

Description

technical field [0001] The invention relates to the technical field of porous medium burners, in particular to a performance testing method of a porous medium burner and a performance testing device of a porous medium burner. Background technique [0002] The premixed combustion in the porous medium burner is a complex heat exchange process including chemical reaction and the coupling of three heat exchange modes: heat conduction, convection and heat radiation. Therefore, the detection of premixed combustion performance is a very important aspect when testing and verifying the performance of porous media burners. At present, when testing the premixed combustion performance of porous media burners, an independent energy equation is proposed for gas and solid, but radiation effect is not considered. Important parameters such as temperature and burning rate have a great influence. In the treatment of radiative heat transfer, the radiation model suitable for optically thick me...

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Problems solved by technology

At present, when testing the premixed combustion performance of porous media burners, it is proposed to use independent energy equations for gas and solid, but the radiation effect is not considered, and the radiation heat transfer has great influence on flame position, flame Important parameters such as temperature and burning speed have a great influence

For the treatment of radiation heat transfer, the radiation model suitable for optically thick media is not satisfied at the outlet of the porous media burner, and some other radiation models are too complicated when dealing with the internal calculation area of ​​the porous media burner

Therefore, it is not only important but also quite difficult to test the premixed combustion performance of porous media burners

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