Forced convection transient heat transfer for helium gas at various periods of exponential increase of heat input to a horizontal cylinder and a plate (ribbon) was experimentally and theoretically studied. 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. The dependence of transient heat transfer on the gas flowing velocity becomes weaker when the period becomes very shorter. However, the gas temperature in this study shows little influence on the heat transfer coefficient. 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. The values of numerical solution for surface temperature and heat flux were compared and discussed with authors’ experimental data. It was clarified that the surface superheat and heat flux increase exponentially as the heat generation rate increases with the exponential function. The temperature distribution near the heater becomes larger as the surface temperature increases. The values of numerical solution for surface temperature and heat flux agree well with the experimental data for the cylinder diameter of 1 mm. However, the heat fluxes show some differences from the experimental values for the cylinder diameters of 0.7 mm and 2.0 mm. And for the numerical solution for a plate, 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.
Skip Nav Destination
ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences
August 10–14, 2008
Jacksonville, Florida, USA
Conference Sponsors:
- Heat Transfer Division
ISBN:
978-0-7918-4847-0
PROCEEDINGS PAPER
Transient Heat Transfer From Single Horizontal Heaters in Forced Flow of Helium Gas at Exponentially Increasing Heat Inputs
Katsuya Fukuda,
Katsuya Fukuda
Kobe University, Hyogo, Japan
Search for other works by this author on:
Makoto Shibahara
Makoto Shibahara
Kobe University, Hyogo, Japan
Search for other works by this author on:
Qiusheng Liu
Kobe University, Hyogo, Japan
Katsuya Fukuda
Kobe University, Hyogo, Japan
Makoto Shibahara
Kobe University, Hyogo, Japan
Paper No:
HT2008-56274, pp. 585-595; 11 pages
Published Online:
July 7, 2009
Citation
Liu, Q, Fukuda, K, & Shibahara, M. "Transient Heat Transfer From Single Horizontal Heaters in Forced Flow of Helium Gas at Exponentially Increasing Heat Inputs." Proceedings of the ASME 2008 Heat Transfer Summer Conference collocated with the Fluids Engineering, Energy Sustainability, and 3rd Energy Nanotechnology Conferences. Heat Transfer: Volume 1. Jacksonville, Florida, USA. August 10–14, 2008. pp. 585-595. ASME. https://doi.org/10.1115/HT2008-56274
Download citation file:
10
Views
Related Proceedings Papers
Related Articles
Local Convective Heat Transfer From a Heated Surface to a Planar Jet of Water With a Nonuniform Velocity Profile
J. Heat Transfer (November,1990)
Experimental
Estimate of the Continuous One-Dimensional Kernel Function in a Rectangular Duct With Forced
Convection
J. Heat Transfer (August,2006)
An Experimental Study of Transient Heat Transfer From Discrete Heat Sources in Water Cooled Vertical Rectangular Channel
J. Electron. Packag (September,2005)
Related Chapters
Control and Operational Performance
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
New Generation Reactors
Energy and Power Generation Handbook: Established and Emerging Technologies
The Special Characteristics of Closed-Cycle Gas Turbines
Closed-Cycle Gas Turbines: Operating Experience and Future Potential