Transient heat transfer coefficients for helium gas flowing over a horizontal plate (ribbon) were measured under wide experimental conditions. The platinum plate with a thickness of 0.1 mm was used as test heater and heated by electric current. The heat generation rate was exponentially increased with a function of Q0exp(t/τ). 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 50 ms to 17 s. The surface superheat and heat flux increase exponentially as the heat generation rate increases with the exponential function. It was clarified that the heat transfer coefficient approaches the quasi-steady-state one for the period τ longer than about 1 s, and it becomes higher for the period shorter than around 1 s. The dependence of transient heat transfer on the gas flowing velocity becomes weaker when the period becomes very shorter. The gas temperature in this study shows little influence on the heat transfer coefficient. Empirical correlation for quasi-steady-state heat transfer was obtained based on the experimental data.
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14th International Conference on Nuclear Engineering
July 17–20, 2006
Miami, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4243-6
PROCEEDINGS PAPER
Transient Forced Convection Heat Transfer for Helium Gas Flowing Over a Horizontal Plate
Makoto Shibahara,
Makoto Shibahara
Kobe University, Kobe, Japan
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Katsuya Fukuda
Katsuya Fukuda
Kobe University, Kobe, Japan
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Qiusheng Liu
Kobe University, Kobe, Japan
Makoto Shibahara
Kobe University, Kobe, Japan
Katsuya Fukuda
Kobe University, Kobe, Japan
Paper No:
ICONE14-89839, pp. 865-872; 8 pages
Published Online:
September 17, 2008
Citation
Liu, Q, Shibahara, M, & Fukuda, K. "Transient Forced Convection Heat Transfer for Helium Gas Flowing Over a Horizontal Plate." Proceedings of the 14th International Conference on Nuclear Engineering. Volume 2: Thermal Hydraulics. Miami, Florida, USA. July 17–20, 2006. pp. 865-872. ASME. https://doi.org/10.1115/ICONE14-89839
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