真空炉温度均匀性测量的数值模拟研究 |
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引用本文: | 刘明君,赵学师.真空炉温度均匀性测量的数值模拟研究[J].计测技术,2021,41(3):20-24. |
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作者姓名: | 刘明君 赵学师 |
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作者单位: | 中国电子科技集团公司第十四研究所, 江苏 南京210039 |
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摘 要: | 热电偶是检测真空炉温度均匀性的常用计量器具,但目前热电偶的几何特性及发射率对炉温均匀性检测影响方面的研究较少.本文利用数值模拟方法研究了热电偶发射率和直径对真空炉温度均匀性检测的影响,结果表明直径和发射率对常用规格热电偶稳态温度影响量级相当.开展零维模型分析,结果表明热电偶温度对直径和发射率相对变化率的敏感性相等,验证...
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关 键 词: | 真空炉 温度均匀性 热电偶 数值模拟 |
Numerical Simulation of Measurement of Temperature Uniformity in Vacuum Furnace |
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Abstract: | Thermocouples have been widely applied in the measurement of temperature uniformity of vacuum furnaces. The effects of geometry and emissivity of thermocouple on the temperature uniformity measurement have not been sufficiently investigated. These effects have been investigated by numerical simulation method in this paper. The results show that the influence of diameter of thermocouple on the steady-state temperature of commonly used thermocouples is close to the influence of emissivity. The 0D model analysis shows that the sensitivity of thermocouple temperature to the relative change rate of diameter is equal to the sensitivity to the relative change rate of emissivity, which verifies the accuracy of the numerical simulation conclusions. This article provides a theoretical guidance and technical reference for temperature measurement of vacuum furnace. |
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Keywords: | vacuum furnace temperature uniformity thermocouple numerical simulation |
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