摘要
针对初始温度为800℃的连铸坯在地下通道内运输过程中的传热过程,建立数值计算模型,重点关注和考察地下通道混凝工、润将小加胶面温度上升最快,最高温度达到492.85℃;地下通道空间内空混凝土壁面使其温度迅速上升,混凝土上侧壁面温度上升最快,最高温度达到492.85℃;地下通道空间内空气温度明显低于连俦坯和混凝土表面温度,连铸坯向混凝土壁面的传热主要方式为辐射传热;混凝土上侧壁面温度分布不均匀,与连铸坯正对区域的温度最高,是考察混凝土材料高温环境下安全状况时需重点关注的位置;隔热罩具有保护混凝土和对连铸坯保温的作用,能使混凝土温度维持在100℃以下,并维持连俦坯表面平均温度在700℃以上。
A numerical model is established against the heat transfer process with the 800℃ initial temperatureof the continuous casting billets during the transportation process in the underground tunnel,and the undergroundpassage concrete,continuous casting billets and the temperature status adding heat shield are focused on and investigated.The results show that the concrete walls are heated after the continuous casting billets enter into theunderground passage.The temperature of the upper concrete wall rises the fastest with the highest temperature of 492.85℃.The air temperature in the underground passage space is obviously lower than that of surface of thecontinuous casting billets and the concrete wall,which means that radiation heat transfer is the main heat transfermode from continuous casting billets to the concrete wall.The temperature distribution of the upper coerete wall is not uniform.The highest temperature area is the area directly opposite to the continuous casting billets.Thus,the area directly opposite to the continuous casting billets need more attention when investigating the safety situation ofconcrete materials at high temperatures.The heat shield has the function of heat preservation to the concrete and the continuous casting billets,the temperature of the concrete wall keeps below 100℃ and the average temperature of thecontinuous casting billets surface keeps above 700℃.
作者
王业峰
刘前
周浩宇
陈小赞
李谦
陈思墨
Wang Yefeng;Liu Qian;Zhou Haoyu;Chen Xiaozan;Li Qian;Chen Simo(Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan;School of Minerals Processing&Bioengineering,Central South University,Changsha 410083,Hunan;School of Energy Engineering,Zhejiang University,Hangzhou 310027,Zhejiang)
出处
《工程建设》
2020年第11期7-11,共5页
Engineering Construction
基金
湖南省自然科学基金项目(2020JJ5994)。
关键词
连铸坯运输
传热状况
温度分布
隔热罩
数值模拟
transportation of continuous casting billets
heat transfer status
temperature distribution
heatshield
numerical simulation
