Experimental investigation on simultaneous measurement of temperature distributions and radiative properties in an oil-fired tunnel furnace by radiation analysis

Autor(es)

Lou, Chun ^[1] ; Li, Wen-Hao ^[1] ; Zhou, Huai-Chun ^[1] ; Salinas, Carlos T. ^[2]

Afiliação do(s) autor(es)

^[1] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 430074, Hubei - Peoples R China

^[2] Univ Taubate, Dept Mech Engn, BR-12060440 Taubate, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER; v. 54, n. 1-3, p. 1-8, JAN 15 2011.
• Citações Web of Science: 28

Resumo

The paper reports experimental investigations on simultaneous measurement of temperature distribution and radiative properties in an oil-fired tunnel furnace by radiation analysis. Two color CCD cameras were used to obtain visible thermal radiation in the furnace. A radiation imaging model was established by the calculation of radiative transfer equation in the furnace. The temperature distribution and radiative properties can be obtained from the inversion of the radiative imaging model. The validity of radiative imaging model was verified by the numerical analysis of cavity radiation and isothermal system radiation, and the accuracy of reconstruction method was validated by simulation reconstruction. The experimental analysis was divided into two parts. Firstly, the temperatures of wall surface were calculated from the radiative image of refractory wall and compared with the measured temperature of a thermocouple. The difference between the two methods was only about 20 K. Secondly, the temperature distributions in the furnace, absorption coefficients of combustion medium, and emissivities of refractory wall were reconstructed. Because of a single burner in the tunnel furnace, the temperature distributions in the XY vertical sections in the furnace were with temperature higher in the center and lower near the refractory wall surface, and the temperatures decreased along the length of the tunnel furnace. The measured emissivity of refractory wall showed that the refractory material of RPA-MC30 is with high reflectivity in visible spectrum. (C) 2010 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 03/12456-7 - Estudo de métodos de solução numérica da equação de transporte radiativo para cômputo do processo de formação de imagem termográfica e projeto de uma bancada de termografia para aplicação em pesquisa e controle de sistemas térmicos
• Beneficiário: Carlos Teofilo Salinas Sedano
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores