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Experimental and numerical verification of transient spatial temperature distribution in thick-walled pressure components

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Abstract

The aim of this work is to present a method to determine the transient-state spatial temperature distribution in a cylindrical component. The presented method involves solving the inverse heat conduction problem based on the Finite volume method (FVM). This approach enables determination of transient-state temperature fields with boundary conditions known on one surface of the component only. The proposed method is verified using the laboratory installation located at the Cracow University of Technology. The main components of the laboratory stand are, among others, a steam outlet header and a steam boiler. During the experiment, the steam header is heated up abruptly from the inside by contact with dry saturated steam. The spatial transient-state temperature distribution within the steam outlet header is determined using the proposed method, which is based on temperature measurements made by 19 thermocouples located on the outer surface of the component. The temperature histories in three selected nodes are compared with the measurement results obtained from thermocouples located inside the component wall. The exact location of the thermocouples corresponds to the nodal position at selected control volumes. Moreover, the Ansys Mechanical APDL software is used to verify calculations and experimental data. A transient- state simulation is performed. The temperature histories at the inner and outer surfaces are set as the model boundary conditions. In order to enable verification of the temperature measurements, the component discrete model includes nodes at appropriate locations. An error analysis is performed between calculated and measured temperature values. The results obtained from the numerical and experimental validation demonstrate fully satisfactory agreement. Additionally, a stress analysis of the outlet header is performed in the Ansys software based on the transient-state temperature distribution within the steam outlet header. The method proposed in this paper is a convenient and accurate tool for monitoring working conditions of the power boiler thick-walled components.

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Authors and Affiliations

  1. Cracow University of Technology, Institute of Thermal Power Engineering, Al. Jana Pawła II 37, 31-864, Cracow, Poland

    Bohdan Węglowski & Marcin Pilarczyk

Authors
  1. Bohdan Węglowski
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  2. Marcin Pilarczyk
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Corresponding author

Correspondence to Marcin Pilarczyk.

Additional information

This paper was presented at the ICCHM2T2017, Sejong Hotel, Seoul, Korea, May 28–June 1, 2017. Recommended by Guest Editor Heuy Dong Kim.

Bohdan Węglowski is a Professor of Faculty of Mechanical Engineering at Cracow University of Technology, Poland. His current research interests include the exploitation of steam boilers, monitoring of thick-walled pressure components and fatigue analysis.

Marcin Pilarczyk received his B.Eng. and M.S. in Faculty of Mechanical Engineering from Cracow University of Technology, Poland, in 2012 and 2013. His research interests are a thermal and structural analysis of pressure vessels, steam boiler exploitation and energy systems.

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Węglowski, B., Pilarczyk, M. Experimental and numerical verification of transient spatial temperature distribution in thick-walled pressure components. J Mech Sci Technol 32, 1087–1098 (2018). https://doi.org/10.1007/s12206-018-0211-z

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  • DOI: https://doi.org/10.1007/s12206-018-0211-z

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