高层建筑受下垫面热辐射的理论计算模型
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摘要
在合理假设的基础上,建立高层建筑受下垫面热辐射的物理数学模型.通过理论分析,得出高层建筑受下垫面热射辐射量的理论计算关系式.下垫面对高层建筑的热辐射随其距高层建筑水平距离的增加而迅速减少,存在一个有效的辐射范围,它仅与高层建筑的高度和半径有关.在该范围内对下垫面进行处理,可有效地减少或增加下垫面对高层建筑的热辐射.
The assumptions to the thermal radiation of the underlying surface agrees with Lambert cosine law,the tall building is equivalent firstly to a cylinder,then the mathematical model to describe the thermal radiation from the underlying surface to tall building is established and analyzed theoretically.The general formulas to calculate this thermal radiation are obtained.The formulas show that the rate of this thermal radiation decreases quickly with increasing the horizontal distance between the radiation surface and tall building,and there is a range of underlying surface from which the thermal radiation to the tall building is dominant;so taking some measures to this range,this thermal radiation can be effectively adjusted.
The assumptions to the thermal radiation of the underlying surface agrees with Lambert cosine law,the tall building is equivalent firstly to a cylinder,then the mathematical model to describe the thermal radiation from the underlying surface to tall building is established and analyzed theoretically.The general formulas to calculate this thermal radiation are obtained.The formulas show that the rate of this thermal radiation decreases quickly with increasing the horizontal distance between the radiation surface and tall building,and there is a range of underlying surface from which the thermal radiation to the tall building is dominant;so taking some measures to this range,this thermal radiation can be effectively adjusted.
引文
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[2]YOSHIE R,KAWAI H,SHI MURA M,WEI R.Study on wind-induced vibration of super high rise building bymulti-degree-of freedom model[J].Journal of Wind Engineering and Industrial Aerodynamics,1997(69-71):745-755.
[3]黄本才,汪丛军,周大伟,等.下游干扰体对上游高层建筑风力的影响[J].同济大学学报:自然科学版,2007,35(8):1025-1029.
[4]BENEDICT N L,HUNT M L,ZUKOSKI E E.Buoyant flows in vertical shafts with applications to high-risebuilding fires[J].American Society of Mechanical Engineers,Heat Transfer Division,1998,357(2):47-54.
[5]XUE H,CHOU S K,ZHONG X Q.Thermal environment in a confined space of high-rise building with split air con-ditioning system[J].Building and Environment,2004,39(7):817-823.
[6]吕大刚,邢方亮,张世海,等.高层建筑结构选型智能决策支持系统研究开发[J].哈尔滨工业大学学报,2004,36(2):205-208.
[7]冉茂宇.室外人体受地面热辐射的预测模型[J].建筑热能通风空调,2007,26(4):5-8.
[8]冉茂宇,杨若菡,孟庆林.太阳辐射下户外空间界面温度的预测模型和方法[J].太阳能学报,2006,27(7):719-724.
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