Steady and transient forced convection transient heat transfer due to exponentially increasing heat input to a heater is important as a database for safety assessment of the transient heat transfer process not only in a high temperature gas cooled reactor (HTGR) due to an accident in excess reactivity but also in high heat flux gas cooling devices such as a gas turbine and a rocket engine. In this research, forced convection transient heat transfer for helium gas at various periods of exponential increase of heat input (Q0exp(t/τ)) to a horizontal narrow plate was numerically solved based on a turbulent flow model. The platinum plate with a length of 50 mm was used as test heater. The 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 8.6 s. The values of numerical solutions for surface temperature and heat flux were compared and discussed with authors’ experimental values. It was obtained that the surface temperature difference and heat flux increase exponentially as the heat generation rate increases with the exponential function. Then the temperature within the boundary layer also increases with the increase of the surface temperature. It is understood that the gradient of the temperature distribution near the wall of the plate is higher at a higher surface temperature difference. 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. And also, heat transfer coefficients at the velocity of 6 m/s agree well with the experimental data, though they show some differences at other velocities. They agree within 15% at various periods and velocities.
Skip Nav Destination
16th International Conference on Nuclear Engineering
May 11–15, 2008
Orlando, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4815-9
PROCEEDINGS PAPER
Transient Forced Convection Heat Transfer Due to Exponentially Increasing Heat Input for Helium Gas Flowing on a Narrow Plate Available to Purchase
Makoto Shibahara,
Makoto Shibahara
Kobe University, Kobe, Japan
Search for other works by this author on:
Katsuya Fukuda
Katsuya Fukuda
Kobe University, Kobe, Japan
Search for other works by this author on:
Makoto Shibahara
Kobe University, Kobe, Japan
Qiusheng Liu
Kobe University, Kobe, Japan
Katsuya Fukuda
Kobe University, Kobe, Japan
Paper No:
ICONE16-48477, pp. 831-837; 7 pages
Published Online:
June 24, 2009
Citation
Shibahara, M, Liu, Q, & Fukuda, K. "Transient Forced Convection Heat Transfer Due to Exponentially Increasing Heat Input for Helium Gas Flowing on a Narrow Plate." Proceedings of the 16th International Conference on Nuclear Engineering. Volume 2: Fuel Cycle and High Level Waste Management; Computational Fluid Dynamics, Neutronics Methods and Coupled Codes; Student Paper Competition. Orlando, Florida, USA. May 11–15, 2008. pp. 831-837. ASME. https://doi.org/10.1115/ICONE16-48477
Download citation file:
10
Views
Related Proceedings Papers
Related Articles
Swirling Effects on Laminarization of Gas Flow in a Strongly Heated Tube
J. Heat Transfer (May,1999)
Heat Exchanger Design Considerations for Gas Turbine HTGR Power Plant
J. Eng. Power (April,1977)
An Experimental Study of Transient Heat Transfer From Discrete Heat Sources in Water Cooled Vertical Rectangular Channel
J. Electron. Packag (September,2005)
Related Chapters
Studies Performed
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
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