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A New Approach in Heat Transfer Analysis: Reduced-Scale Straight Bars with Massive and Square-Tubular Cross-Sections

Author

Listed:
  • Gábor Turzó

    (Veiki Energia, Research and Design in Heat-Technology Co., Ltd., 30923 Budapest, Hungary)

  • Ildikó-Renáta Száva

    (Department of Mechanical Engineering, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania)

  • Sándor Dancsó

    (Veiki Energia, Research and Design in Heat-Technology Co., Ltd., 30923 Budapest, Hungary)

  • Ioan Száva

    (Department of Mechanical Engineering, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania)

  • Sorin Vlase

    (Department of Mechanical Engineering, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania)

  • Violeta Munteanu

    (Department of Mechanical Engineering, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania)

  • Teofil Gălățanu

    (Department of Mechanical Engineering, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania)

  • Zsolt Asztalos

    (Department of Mechanical Engineering, Transilvania University of Brasov, B-dul Eroilor 29, 500036 Brasov, Romania)

Abstract

This paper reports experimental and theoretical result derived from research on steel structural elements’ fire-protection with intumescent paint. The experimental results were obtained by means of an original testing bench, briefly described below and some basic cases, i.e., horizontally and vertically disposed, massive and square-tubular cross-sectioned, reduced-scale straight bars heated at one end. By means of the thermocouples mounted along the bars, the temperature distribution laws were monitored, depending on the heated end’s nominal temperature. The paper describes an original approach to the temperature distribution evaluation by means of some new parameters, based on the temperature distribution laws experimentally obtained with reduced-scale models. We involved the least-square method (LSM) and the curve-fitting one in order to obtain a more accurate temperature distribution law compared to the experimentally obtained ones. We also introduced some new parameters in order to define the amount of heat loss in a more accurate way. Based on the results obtained, the authors suggest that this approach to the temperature distribution law can be efficiently applied in further thermal analyses, for both 2D and 3D structures. The paper also includes a thorough analysis of “ m ” variation along the square-tubular-cross-section, reduced-scale straight bars, and similar new approaches are proposed by the authors. The sub-goals of this investigation were (1) to obtain useful correlations between the magnitudes of the massivity ζ = P / A and the parameter “ m ” along the bar, and (2) to analyze, on reduced-scale models, the heat distribution laws on unprotected and intumescent-paint-protected 2D and 3D steel structures.

Suggested Citation

  • Gábor Turzó & Ildikó-Renáta Száva & Sándor Dancsó & Ioan Száva & Sorin Vlase & Violeta Munteanu & Teofil Gălățanu & Zsolt Asztalos, 2022. "A New Approach in Heat Transfer Analysis: Reduced-Scale Straight Bars with Massive and Square-Tubular Cross-Sections," Mathematics, MDPI, vol. 10(19), pages 1-24, October.
    • Handle: RePEc:gam:jmathe:v:10:y:2022:i:19:p:3680-:d:936258
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    References listed on IDEAS

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    1. Wang, Fajie & Zhao, Qinghai & Chen, Zengtao & Fan, Chia-Ming, 2021. "Localized Chebyshev collocation method for solving elliptic partial differential equations in arbitrary 2D domains," Applied Mathematics and Computation, Elsevier, vol. 397(C).
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    Cited by:

    1. Ioan Száva & Sorin Vlase & Ildikó-Renáta Száva & Gábor Turzó & Violeta Mihaela Munteanu & Teofil Gălățanu & Zsolt Asztalos & Botond-Pál Gálfi, 2023. "Modern Dimensional Analysis-Based Heat Transfer Analysis: Normalized Heat Transfer Curves," Mathematics, MDPI, vol. 11(3), pages 1-33, February.

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