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国外文献 > 3.企业技术文献 > TIMKEN铁姆肯 >

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标 题： Accurate Temperature Measurement during Water Quench Operations Characterized by Boiling Water Heat Transfer
水淬操作中沸水传热特性下的精确温度测量
作 者： D. Li
M. A. Wells
S. L. Cockcroft
J. E. Ives
D. Jin
关键词： Boiling Water Heat Transfer  [沸水传热]
Inverse Heat Conduction Model  [逆传热传导模型]
Temperature Measurement  [温度测量]
Thermocouple  [热电偶]
Water Quench  [水润清凉]
出版年： 2004
文集名： AIST Process Metallurgy, Product Quality and Applications
AIST工艺冶金、产品质量与应用
会议名： Materials Science and Technology 2004 (MS&T 2004), vol.1
材料科学与技术 2004（MS&T 2004），第1卷
届 次：
摘 要： Mathematical models are taking on an increased role in process design, optimization and in some cases process control. Inherent to the accuracy of the model predictions is accurate knowledge of the boundary conditions in the process. In situations where water quenching is used to control the temperature of the product being produced, it is important to quantitatively understand the heat transfer at the surface of the product during the quench operation (typically expressed as a boiling water curve). Often these boiling curves are determined by using experimental measurements of temperature-time data in the product during a quench operation in conjunction with Inverse Heat Conduction (IHC) models. The experimental data used is usually measured using thermocouples installed in the sample being cooled at a known sub-surface location. This paper outlines the influence of the thermocouple hole on boiling water heat transfer predictions using and inverse conduction model. The study showed that, in some circumstances - high heat flux in combination with low thermal conductivity - the hole or void used to install the thermocouple has to be included in the analysis in order to obtain accurate boiling curves. The paper also outlines the use of a general criterion to determine if the thermocouple hole needs to be included in the analysis based on a Biot number. This work was done as part of a collaborative research agreement with The TIMKEN Company with partial funding from the U.S. Department of Energy under award #DE-FC36-99ID13819.

数学模型在工艺设计、优化以及某些情况下工艺控制中正发挥着越来越重要的作用。模型预测的准确性取决于对工艺边界条件的准确掌握。当采用水淬法来控制产品温度时，定量理解淬火过程中产品表面的传热行为（通常以沸水曲线表示）显得尤为重要。这些沸水曲线通常通过实验测量淬火过程中的产品温度-时间数据，并结合逆传热（IHC）模型来确定。所用的实验数据通常是通过安装在冷却样品特定位置的热电偶进行测量的。本文介绍了热电偶孔对使用逆传热模型预测沸水传热的影响。研究表明，在某些情况下——即高温流与低导热系数同时存在时——为了获得准确的沸腾曲线，必须将安装热电偶所用的孔或空隙纳入分析。该论文还提出了一种通用准则，基于比奥数来判断是否需要将热电偶孔纳入分析。此项工作是根据与TIMKEN公司签署的合作研究协议开展的，并获得了美国能源部第DE-FC36-99ID13819号资助的部分资金支持。
中文内容为网络AI翻译，专业术语未必准确，仅供参考。

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