Design and analysis on fume exhaust system of blackbody cavity sensor for continuously measuring molten steel temperature | Zendy

Guohui Mei | Zendy; Jiu Zhang | Zendy; Shumao Zhao | Zendy; Zhi Xie | Zendy

Open Access

Design and analysis on fume exhaust system of blackbody cavity sensor for continuously measuring molten steel temperature

Author(s) -

Guohui Mei,

Jiu Zhang,

Shumao Zhao,

Zhi Xie

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4979111

Subject(s) - emissivity , black body radiation , isothermal process , materials science , temperature measurement , radiator (engine cooling) , exhaust gas , volumetric flow rate , solar furnace , flow (mathematics) , monte carlo method , mechanics , mechanical engineering , optics , thermodynamics , physics , engineering , electrical engineering , statistics , mathematics , radiation , solar energy

Fume exhaust system is the main component of the novel blackbody cavity sensor with a single layer tube, which removes the fume by gas flow along the exhaust pipe to keep the light path clean. However, the gas flow may break the conditions of blackbody cavity and results in the poor measurement accuracy. In this paper, we analyzed the influence of the gas flow on the temperature distribution of the measuring cavity, and then calculated the integrated effective emissivity of the non-isothermal cavity based on Monte-Carlo method, accordingly evaluated the sensor measurement accuracy, finally obtained the maximum allowable flow rate for various length of the exhaust pipe to meet the measurement accuracy. These results will help optimize the novel blackbody cavity sensor design and use it better for measuring the temperature of molten steel

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