发射率
辐射传输
焊剂(冶金)
辐射通量
机械
超调(微波通信)
大气科学
热流密度
热辐射
辐射热
辐射通量
环境科学
气象学
材料科学
热力学
传热
物理
光学
复合材料
工程类
冶金
电气工程
作者
Akihiko Shinotake,S. Koda,Kazuo Akita
标识
DOI:10.1080/00102208508946998
摘要
Abstract The radiative heat flux to the fuel surface in heptane pool fires on circular pans of 0.3-1.0 m diameter was measured experimentally by use of combinations of Garden-type fluxmeters with receiving surfaces of different emissivity as functions of rad ial position and of pan size. In the initial transient stage of the fire evolution, the internal radiat ive flux showed an overshoot followed by a considerable fall in larger pool fires. In the steady burning stage,the ratio of the internal flux to the external flux showed a trend to become smaller with the increase Of pan size. The two above mentioned features imply the importance of a certain kind of radiation blockage in larger fires. Simple two-layer models were employed in order to explain the observed features qualitatively.
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