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首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >RADIATION HEAT TRANSFER TO THE LEEWARD SIDE OF A MASSIVE OBJECT SUSPENDED OVER A POOL FIRE
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RADIATION HEAT TRANSFER TO THE LEEWARD SIDE OF A MASSIVE OBJECT SUSPENDED OVER A POOL FIRE

机译：辐射热转移到悬浮在火堆上方的大量物体的最左边

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摘要

Measurements of radiation heat transfer to a massive cylinder engulfed in a 30-minute pool fire were performed. Light winds blew across the calorimeter axis at the beginning of the test but diminished to still air at the end. A fairly large regiou was observed on the leeward side of the calorimeter where the measured flame emissive power was effectively uniform and constant with time. The most frequently measured effective flame temperature is 1100℃. Early in the fire when the wind is strongest, the effective flame emissivity in that region is roughly 0.73. At the end of the fire the wind speed diminished causing the thickness of the leeward flame zone to decrease. During this time the flame was not optically thick. This allowed the object to radiate energy to the cool environment surrounding the fire. The effective flame emissivity during this time was roughly 0.68.
机译：进行了辐射热转移到吞没了30分钟池火的大圆柱体的测量。在测试开始时，风量沿热量计轴吹出，但在结束时减弱为静止空气。在量热计的背风侧观察到相当大的区域，在该区域，测得的火焰发射功率有效地均匀且随时间恒定。最常测量的有效火焰温度为1100℃。在大风早期的火灾中，该区域的有效火焰发射率约为0.73。火灾结束时，风速减小，导致背风火焰区域的厚度减小。在此期间，火焰的光学厚度不大。这使物体可以向火周围的凉爽环境辐射能量。在此期间的有效火焰发射率大约为0.68。

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