Visual measurement method for temperature distribution of single-connection combustion field

A technology of temperature distribution and measurement method, which is applied in chemical analysis by combustion, application of thermometer, thermometer, etc. It can solve the problems of interfering with the flow of materials in the combustion field and inability to work for a long time, and achieves simple structure, good adaptability, and fast response fast effect

Active Publication Date: 2020-05-15
BEIHANG UNIV
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  • Application Information

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Problems solved by technology

However, intrusive sensors interfere with the flow of substances in the combustion field and cannot work long-term in practical applications

Method used

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  • Visual measurement method for temperature distribution of single-connection combustion field
  • Visual measurement method for temperature distribution of single-connection combustion field
  • Visual measurement method for temperature distribution of single-connection combustion field

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Embodiment Construction

[0037] The present invention is a visual measurement method for the temperature distribution of a single-connected combustion field, and the specific implementation method is as follows:

[0038] Step 1: For the typical working conditions of the burner, increase the intake flow rate of propane fuel from 30mL / min to 50mL / min with a step size of 10mL / min, and increase the intake flow rate of air from 100mL / min to 200mL / min , with a step size of 50mL / min, using ion current probes and thermocouple probes to collect local admittance and temperature data of the combustion field, such as figure 2 As shown, the ion current probe 201 and the thermocouple probe 202 are connected by a direction-adjustable fixture 203 and fixed on the two-dimensional precision displacement stage, and the impedance of the ion current probe electrode pair is collected by the impedance measurement hardware system connected thereto. The temperature difference caused by the front end of the thermocouple probe...

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Abstract

The invention relates to a visual measurement method for temperature distribution of a single-connection combustion field. The visual measurement method comprises the following specific operation steps: 1, acquiring local admittance and temperature data of flame by using an ionic current probe and a thermocouple probe aiming at the typical working condition of a combustor; 2, establishing a mapping model from the admittance rate of the combustion field to the temperature by utilizing the measurement data; 3, designing an electrical tomography sensor according to the structure of the combustor,measuring the mutual impedance of the electrode array distributed around the combustion field, and reconstructing the distribution of the conductivity and the dielectric constant in the combustion field; and 4, substituting the reconstructed distribution data into an admittance-to-temperature mapping model to obtain a temperature distribution image. The method provided by the invention is suitable for measuring the combustion field with a lightproof structure and can quickly obtain the image of temperature distribution and has the advantages of no contact, no radiation, simple structure, lowcost and the like and has important practical value and application prospect.

Description

technical field [0001] The invention relates to a visual measurement method for the temperature distribution of a single-connected combustion field, which belongs to the field of dynamic monitoring of the combustion field. Background technique [0002] Combustion is the main form of energy conversion and widely exists in industrial processes. Temperature measurement data can be used to improve combustion process control technology and optimize combustion chamber design to meet energy saving and low emission requirements. Thermocouples and pyrometers are the most commonly used equipment for temperature measurement in combustion fields. However, thermocouples and pyrometers are invasive or contact, and a single measurement can only reflect the local temperature information of the entire combustion field. Passive temperature measurement technology based on flame radiation has achieved certain applications in industrial processes. Active spectral analysis technology based on op...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/00G01K13/00G01N31/12G01K7/02
CPCG01K11/00G01K13/00G01N31/12
Inventor 徐立军胡蝶曹章田雨
Owner BEIHANG UNIV
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