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为了研究辐射参与性烟气对红外测温法金属壁面温度测量的影响,首先根据实验中红外探测器测量得到的表面温度分布的特点,建立了一维表面红外测温模型;然后根据红外热成像测温原理及辐射传输理论,利用源项多流法分析模型计算了烟气覆盖表面在不同烟气厚度和不同表面温度下红外探测器获得的温度;最后利用马弗炉模拟不同温度的表面,振动筛模拟不同浓度和厚度的烟气环境,在实验室条件下设计搭建了模拟烟气覆盖表面的红外测温实验系统,实验验证了源项多流法分析模型,实验测量得到的温度与分析模型预测的温度吻合较好,并提出了利用反演方法修正红外测温的设想。
In order to study the influence of radiation participant flue gas on the temperature measurement of metal wall by infrared thermometry, a one-dimensional surface infrared temperature measurement model is established based on the characteristics of the surface temperature distribution measured by the infrared detector. Then, Temperature principle and radiation transmission theory, the source multi-flow analysis model was used to calculate the temperature of the smoke detector covered by the infrared detector with different flue gas thickness and surface temperature. Finally, the muffle furnace was used to simulate the surface temperature, The vibrating screen simulates the flue gas environment with different concentrations and thicknesses. The infrared temperature measurement system with simulated flue gas covering surface is designed and constructed under the laboratory conditions. The experimental verification of the multi-flow analysis model of the source project, experimental temperature measurement and analysis The predicted temperature of the model is in good agreement, and the idea of using infrared inversion to correct infrared temperature measurement is proposed.