| 短脉冲激光作用下丙酮液池沸腾现象的瞬态观测 |
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| 引用本文： | 金仁喜,刘登瀛,华顺芳,张正芳,张长梅.短脉冲激光作用下丙酮液池沸腾现象的瞬态观测[J].工程热物理学报,2000,21(2):211-215. |
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| 作者姓名： | 金仁喜 刘登瀛 华顺芳 张正芳 张长梅 |
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| 作者单位： | 1. 海军工程大学动力学院,湖北,武汉,430033
2. 中国科学院工程热物理研究所,北京,100080 |
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| 基金项目： | 中国科学院“九五”基础研究重大资助！KJ951－B1－704 |
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| 摘 要： | 本文对短脉冲激光作用下试件表面的温度变化和丙酮液体汽泡行为进行了瞬态观测，研 究了激光参数和细小金属颗粒等因素对丙酮液体沸腾行为的影响。结果表明：激光参数中，脉宽是 影响温度曲线和汽泡行为的主要因素，随着激光脉宽增大，大汽泡的长大时间和脱离直径减小；汽 泡长大速度与常规沸腾时的完全不同，没有出现等温生长阶段，在激光脉冲后很长时间内汽泡长大 速度快速增大；试件表面覆盖细小金属颗粒后，沸腾过程变得非常剧烈。
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| 关 键 词： | 短脉冲激光 丙酮液池沸腾 瞬态观测 |
| 文章编号： | 0253-231X(2000)02-0211-05 |
| 修稿时间： | 1999-12-08 |
INSTANT OBSERVATION ON THE ACETONE POOL BOILING BEHAVIOR UNDER PULSED LASER-HEATED |
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| JIN Renxi,LIU Dengying,HUA Shunfang,ZHANG Zhengfang,ZHANG Changmei.INSTANT OBSERVATION ON THE ACETONE POOL BOILING BEHAVIOR UNDER PULSED LASER-HEATED[J].Journal of Engineering Thermophysics,2000,21(2):211-215. |
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| Authors: | JIN Renxi LIU Dengying HUA Shunfang ZHANG Zhengfang ZHANG Changmei |
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| Institution: | JIN Renxi
(Engineering Thermophysics Teaching, Naval University of Engineering, Wuhan Hubei 430033)LIU Dengying
(Institute of Engineering Thermophsics, Chinese Academy of Science, Beijing 100080, China)HUA Shunfang
(Engineering Thermophysics Teaching, Naval University of Engineering, Wuhan Hubei 430033)ZHANG Zhengfang
,ZHANG Changmei
(Institute of Engineering Thermophsics, Chinese Academy of Science, Beijing 100080, China) |
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| Abstract: | The variations of temperature on the surface of specimen and acetone pool boiling behavior under pulsed laser-heated are observed instantly. The affections of laser parameters and tiny metal grains on the temperature of specimen's surface and acetone pool boiling behavior are studied. It shows that the pulse width is the main factor that affects the temperature curve and vapor bubble behavior. When the pulse width goes up, the growth time of large vapor bubble and its departure diameter decrease, but its growth velocity changes little. The growth velocity of large vapor bubble is different from which is under normal condition - the phase of isothermal growth has not been observed and the growth velocity rises quickly long after laser pulse. The process of pool boiling turns to be vehemently when the surface of specimen is overlaid with tiny metal grains. |
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| Keywords: | pulse laser acetone pool boiling instant observation |
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