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顶燃式热风炉热电偶在线修复技术的研究与应用
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作者 刘栋 张振 《莱钢科技》 2016年第4期42-43,45,共3页
主要介绍了在线修复热风炉拱顶内衬技术和热电偶造衬修复工艺,解决了热电偶损坏后无法更换,送风温度难以稳定控制的难题,具有较高的使用推广价值。
关键词 顶燃式热风炉 测温电偶 耐火材料 在线修复
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Role of a Single Shield in Thermocouple Measurements in Hot Air Flow 被引量:2
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作者 ma hongwei shi lei tian yangtao 《Journal of Thermal Science》 SCIE EI CAS CSCD 2017年第6期523-532,共10页
To investigate the role of a single shield on steady temperature measurement using therrnocouples in hot air flow, a methodology for solving convection, conduction, and radiation in one single model is provided. In or... To investigate the role of a single shield on steady temperature measurement using therrnocouples in hot air flow, a methodology for solving convection, conduction, and radiation in one single model is provided. In order to compare with the experimental results, a cylindrical computational domain is established, which is the same size with the hot calibration wind-tannel. In the computational domain, two kinds of thermocouples, the bare-bead and the single-shielded thermocouples, are simulated respectively. Surface temperature distribution and the tempera- ture measurement bias of the two typical thermocouples are compared. The simulation results indicate that: 1) The existence of the shield reduces bead surface heat flux and changes the direction of wires inner heat conduction in a colder surrounding; 2) The existence of the shield reduces the temperature measurement bias both by improving bead surface temperature and by reducing surface temperature gradient; 3) The shield effectively reduces the effect of the ambient temperature on the temperature measurement bias; 4) The shield effectively reduces the influence of airflow velocity on the temperature measurement bias. 展开更多
关键词 single-shield bare-bead thermocouples temperature measurement fluid-solid conjugated heat transfer.
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