Simultaneous Conduction and Radiation in Semitransparent Media in the Hot-wire Experiment
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摘要: 對熱線法實驗條件下半透明介質的積分-微分能量方程進行了數值求解。著重分析各個輻射項對內部總熱流的貢獻,研究了介質吸收系數以及熱線黑度對熱線溫升的影響,引入了介質的等效平均吸收系數和熱線的等效表面黑度2個新概念,并討論了簡化模型。Abstract: The full integro-differential equation governing the simultaneous conduction and radiation in semitransparent media in the hot-wire experiment is solved numerically.The radiative contribution to the heat flux is analyzed.The effects of medium's absorption coefficient and emissivity on the temperature rise are studied.The effective mean absorption coefficient of medium and the effective emissivity of hot-wire are introduced,and the simplified model is discussed.
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Key words:
- heat radiation /
- thermal conductivity /
- hot-wire, semitransparent media
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