A Visual Measurement Method for Temperature Distribution in Single Connected Combustion Field
A technology of temperature distribution and measurement method, used in chemical analysis by combustion, application of thermometers, thermometers, etc., can solve the problems of interfering with the flow of materials in the combustion field, unable to work for a long time, etc., and achieves simple structure, good adaptability, and response speed. quick effect
Active Publication Date: 2021-09-28
BEIHANG UNIV
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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
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[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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The invention relates to a visual measurement method for the temperature distribution of a single-connected combustion field, which includes the following specific operation steps: Step 1. Aiming at the typical working conditions of the burner, using an ion current probe and a thermocouple probe to collect the local conductance of the flame Acceptance and temperature data; Step 2, use the measured data to establish a mapping model from the admittance of the combustion field to temperature; Step 3, design an electrical tomography sensor according to the structure of the burner, and measure the electrode array distributed around the combustion field The mutual impedance, and reconstruct the distribution of conductivity and permittivity in the combustion field; step 4, substitute the reconstructed distribution data into the mapping model of admittance to temperature, and obtain the temperature distribution image. The method proposed by the invention is suitable for measuring the combustion field with an opaque structure, can quickly obtain images of temperature distribution, and has the advantages of non-contact, no radiation, simple structure, low cost, etc., 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...
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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