红外与激光工程
紅外與激光工程
홍외여격광공정
INFRARED AND LASER ENGINEERING
2014年
7期
2120-2125
,共6页
雾%太阳辐射%热模型%地面目标%红外
霧%太暘輻射%熱模型%地麵目標%紅外
무%태양복사%열모형%지면목표%홍외
fog%solar radiation%thermal model%ground targets%IR
采用考虑自然雾对太阳辐射的衰减、散射作用进而修正的太阳辐射模型，且考虑含雾湿空气条件下雾滴、湿空气与目标表面的换热机理及表面辐射换热、对流换热，建立了含雾湿空气条件下地面目标热特征分析模型，采用该模型计算分析了雾能见度、风速对目标表面温度的影响，分析了典型雾天条件下目标表面温度变化特性。结果表明：在雾出现时段，雾能见度越小或风速越大，目标表面温度值相对越低；考虑雾对目标表面热特征的影响具有很大的必要性。
採用攷慮自然霧對太暘輻射的衰減、散射作用進而脩正的太暘輻射模型，且攷慮含霧濕空氣條件下霧滴、濕空氣與目標錶麵的換熱機理及錶麵輻射換熱、對流換熱，建立瞭含霧濕空氣條件下地麵目標熱特徵分析模型，採用該模型計算分析瞭霧能見度、風速對目標錶麵溫度的影響，分析瞭典型霧天條件下目標錶麵溫度變化特性。結果錶明：在霧齣現時段，霧能見度越小或風速越大，目標錶麵溫度值相對越低；攷慮霧對目標錶麵熱特徵的影響具有很大的必要性。
채용고필자연무대태양복사적쇠감、산사작용진이수정적태양복사모형，차고필함무습공기조건하무적、습공기여목표표면적환열궤리급표면복사환열、대류환열，건립료함무습공기조건하지면목표열특정분석모형，채용해모형계산분석료무능견도、풍속대목표표면온도적영향，분석료전형무천조건하목표표면온도변화특성。결과표명：재무출현시단，무능견도월소혹풍속월대，목표표면온도치상대월저；고필무대목표표면열특정적영향구유흔대적필요성。
Based on the modified solar model by considering the attenuation and scattering of the fog, and considering the heat transfer mechanism between fog droplets and target surface in the foggy weather and the radiation and convection heat transfer of the surface, the heat transfer model of the ground target surface in the foggy weather was founded. The influence of fog visibility and wind speed on the target temperature field was analyzed by the heat transfer model. The temperature time variation characteristics of the targets in the typical foggy weather was also analyzed. The result shows that during the appearance of the fog, the smaller the fog visibility, the lower the temperature of the target surface; the higher the wind speed, the lower the temperature of the target surface. So it′s very necessary to consider the influence of the fog and wet air during the heat calculation of the ground targets.
