摘要
对流传热通过热体内流体的流动能够快速、有效的在高温和低温之间传递热量。结合多孔沥青路面的特征,通过对多孔沥青混合料特征尺寸、等效颗粒直径等参数的推导计算,得到不同空隙率沥青路面在不同路表温度下的路面对流系数。在有限元软件ANSYS中建立热分析模型,计算分析多孔沥青路面在热传导和热对流两种传热方式共同作用下的传热效果,结果表明沥青路面的降温效果与其空隙率大小呈正线性关系,多孔沥青路面在高温季节的降温效果优于密级配沥青路面。根据长期室内外实测数据,通过统计软件SPSS的可靠性分析,本文计算结果和实测结果相似系数高达0.98。
Heat can be transferred quickly and effectively through the convection associated with fluid flow. The heat convection coefficients of asphalt pavement with different porosities and surface temperatures are calculated using the characteristic size and the equivalent particle diameter of porous asphalt. A thermal model is built with the finite element software ANSYS to analyze the temperature reduction performance of porous asphalt pavement with heat convection considered. It can be seen from the results that the temperature reduction performance of road surface is positively linearly correlated with the asphalt porosity. In the hot season, the temperature reduction performance of porous asphalt pavement is better than that of dense asphalt pavement. Comparing with long-term indoor and outdoor measured data, reliability analysis using the statistical software SPSS reveals a similarity coefficient of 0.98 for the calculation results.
出处
《土木工程学报》
EI
CSCD
北大核心
2011年第10期138-142,共5页
China Civil Engineering Journal
基金
上海市科学技术委员会重点科技攻关项目(052112048-1)
关键词
多孔沥青路面
热对流
对流系数
降温性能
porous asphalt pavement
heat convection
heat convection coefficient
temperature reduction performance
