Forced convection transient heat transfer for helium gas at various periods of exponentially increase of heat input to a horizontal plate (ribbon) was experimentally and theoretically studied. In the experimental studies, the authors measured heat flux, surface temperature, and transient heat transfer coefficients for forced convection flow of helium gas over a horizontal plate under wide experimental conditions. The gas flow velocities ranged from 4 to 10 m/s, the gas temperatures ranged from 313 to 353 K, and the periods of heat generation rate, τ, ranged from 46 ms to 17 s. The pressures were from 400 to 800 kPa. It was clarified that the heat transfer coefficient approaches the quasi-steady-state one for the period longer than about 1 s, and it becomes higher for the period shorter than around 1 s. Empirical correlations for quasi-steady-state heat transfer and transient heat transfer were obtained based on the experimental data. In the theoretical study, transient heat transfer was numerically solved based on a turbulent flow model. It was obtained that the surface superheat and heat flux increase exponentially as the heat generation rate increases with the exponential function. The values of numerical solutions for surface temperature and heat flux at the velocity of 6 m/s agree well with the experimental data, though they show some differences at other velocities.
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ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4274-6
PROCEEDINGS PAPER
Transient Heat Transfer for Parallel Flow of Helium Gas Over a Horizontal Plate
Qiusheng Liu,
Qiusheng Liu
Kobe University, Kobe, Hyogo, Japan
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Katsuya Fukuda,
Katsuya Fukuda
Kobe University, Kobe, Hyogo, Japan
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Makoto Shibahara,
Makoto Shibahara
Kobe University, Kobe, Hyogo, Japan
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Shingo Kikumoto
Shingo Kikumoto
Kobe University, Kobe, Hyogo, Japan
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Qiusheng Liu
Kobe University, Kobe, Hyogo, Japan
Katsuya Fukuda
Kobe University, Kobe, Hyogo, Japan
Makoto Shibahara
Kobe University, Kobe, Hyogo, Japan
Shingo Kikumoto
Kobe University, Kobe, Hyogo, Japan
Paper No:
HT2007-32205, pp. 1031-1039; 9 pages
Published Online:
August 24, 2009
Citation
Liu, Q, Fukuda, K, Shibahara, M, & Kikumoto, S. "Transient Heat Transfer for Parallel Flow of Helium Gas Over a Horizontal Plate." Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 1. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 1031-1039. ASME. https://doi.org/10.1115/HT2007-32205
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