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Measurement of Transient Fluid Temperature in a Pipeline

机译：管道中瞬态流体温度的测量

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摘要

The aim of this paper is to develop a method of determining the heat transfer coefficients on the inner surface of the pipeline and outer surface of the thermometer used to measure the temperature of a fluid flowing under high pressure. The method is based on the solutions to the inverse heat conduction problems for the thermometer and the pipeline wall. The heat transfer coefficients are determined based on the measurement of the temperature of a cylindrical metal thermometer and the temperature of the wall of a cylindrical pipeline. The temperature sensor is located in the pipeline wall close to the inner surface. The correlations for the Nusselt numbers used to determine heat transfer coefficients on the outer surface of the thermometer and the inner surface of the pipeline contain unknown coefficients which are found using the least squares method. The unknown coefficients are selected so that the sum of the squares of differences between the fluid temperature determined based on the measurement of the temperature of the pipeline wall and the fluid temperature obtained from measurements inside the thermometer, calculated for several dozen set time points, is as small as possible.
机译：本文的目的是开发一种确定管道内表面和温度计外表面传热系数的方法，该传热系数用于测量在高压下流动的流体的温度。该方法基于温度计和管道壁的导热逆问题的解决方案。传热系数是根据圆柱形金属温度计的温度和圆柱形管道壁的温度确定的。温度传感器位于靠近内表面的管道壁中。用于确定温度计外表面和管道内表面传热系数的努塞尔数的相关性包含使用最小二乘法找到的未知系数。选择未知系数，以便根据几十个设定时间点计算出的基于管道壁温度的测量结果确定的流体温度与从温度计内部的测量结果获得的流体温度之间的差平方和。越小越好。

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  • 来源
    《Heat Transfer Engineering》 |2018年第16期|1227-1234|共8页
  • 作者

    Jaremkiewicz Magdalena; Taler Jan;

  • 作者单位

    Cracow Univ Technol Inst Thermal Power Engn Al Jana Pawla 2 37 PL-31864 Krakow Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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