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Estimation of the Time-Varying High-Intensity Heat Flux for a Two-Layer Hollow Cylinder

Author

Listed:
  • Lihui Zhang

    (Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education & Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, China)

  • Zhenzhen Chen

    (Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education & Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, China)

  • Donghui Wen

    (Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education & Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, China)

  • Xudong Wang

    (Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China)

  • Daqian Zhang

    (Key Laboratory of Low-Grade Energy Utilization Technologies and Systems of Ministry of Education, School of Energy and Power Engineering, Chongqing University, Chongqing 400030, China)

  • Jun Liang

    (Key Laboratory of Special Purpose Equipment and Advanced Processing Technology, Ministry of Education & Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, China)

Abstract

Gun barrels are subjected to time-varying high-intensity heat flux under multiple firing, which may damage the material and limit the overall performance of the gun. In order to monitor the thermal state of a gun barrel, an inverse method coupling the finite difference method with the sequential function specification method was developed to estimate the unknown time-varying heat flux imposed on the inner wall of a gun barrel. A two-layer hollow cylindrical tube was assumed with the convection heat transfer boundary condition on the outer wall of the tube. A direct heat transfer model was developed, and was used to estimate the temporal distribution of boundary heat flux in approximately real time based on the measured transient temperature at some positions on the outer wall of the gun barrel. Numerical tests were performed to verify the effectiveness and reliability of this method by investigating the influence of temperature measurement noises and future time step selection. The results show that the proposed method has high precision and efficiency in extracting the time-varying heat flux under one-shot and three-shot firing conditions. When there is a measurement noise, this method has good anti-illness characteristics and can achieve better results by appropriately selecting the value of a future time step.

Suggested Citation

  • Lihui Zhang & Zhenzhen Chen & Donghui Wen & Xudong Wang & Daqian Zhang & Jun Liang, 2018. "Estimation of the Time-Varying High-Intensity Heat Flux for a Two-Layer Hollow Cylinder," Energies, MDPI, vol. 11(12), pages 1-16, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:12:p:3332-:d:186414
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    References listed on IDEAS

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    Cited by:

    1. Jan Taler & Paweł Ocłoń & Marcin Trojan & Abdulmajeed Mohamad, 2019. "Selected Papers from the XI International Conference on Computational Heat, Mass and Momentum Transfer (ICCHMT 2018)," Energies, MDPI, vol. 12(12), pages 1-3, June.
    2. Tong Xin & Guolai Yang & Liqun Wang & Quanzhao Sun, 2020. "Numerical Calculation and Uncertain Optimization of Energy Conversion in Interior Ballistics Stage," Energies, MDPI, vol. 13(21), pages 1-21, November.

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