道路融雪化冰过程冰层的热融特性  

Heat melting characteristic of ice layer in ice-snow melting process on road pavement

作　　者：黄勇[1,2] 高青[1,2] 马纯强[2] 张磊[2] 玄哲浩[2] 

机构地区：[1]吉林大学汽车动态模拟国家重点实验室,长春130022 [2]吉林大学热能工程系,长春130022

出　　处：《吉林大学学报（工学版）》2010年第2期391-396,共6页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(50776039)

摘　　要：通过模拟道路冰层热融过程,实验研究了热负荷、冰层厚度等对寒冷环境下冰层融化的传热规律、温度变化、融冰率和冰融水流变性的影响作用。通过研究融冰率、道路构造层和冰层温度时变规律,探索了热融冰特征。研究表明,冰层热融过程中,融冰率变化经历未融、融化加速和融化减缓3个阶段,每个阶段受热负荷作用影响明显,若采用变负荷加热,可更有利于融冰过程能量利用的综合效果。冰层厚度对路基层温度影响较大,冰层越厚,路基层温度越低。通过提高热负荷,可提升路基层温度,保证道路温度。此外,冰融水流动和移动将产生一定的路基层和路面层温度波动。The heat transfer,the temperature change,the ice melting rate,the rheology of melted slurry water,as well as the effects of the heat load and the ice layer thickness in cold environment were investigated using the controllable carbon fiber to heat a slab to simulate the road pavement and melt the ice on it.The heat melting characteristics of the ice layer were studied through measuring the ice melting rate,the temperature histories of the slab layer and the ice layer.It was found that in the heat melting process of the ice layer,the ice melting rate history undergoes 3 stages：unmelting stage,accelerating melting stage,and decelerating melting stage,they are affected obviously by the heat load.The energy utilization effect in the ice melting process may be improved using variable heating.The ice layer thickness affects significantly the temperature of the roadbed layer：the thicker the ice layer,the lower the roadbed layer temperature.The temperature of the roadbed layer can be increased to guarantee the road pavement temperature by raising the heat load.The flowing of the slurry water brings about the temperature fluctuation of the roadbed layer and the road pavement layer.

关 键 词：热能工程 地热利用 道路融冰 热融特性 温变规律 

分 类 号：U491.2[交通运输工程—交通运输规划与管理]