A narrow annular test section of 1.5mm gap and 1800mm length was designed and manufactured, with good tightness and insulation. Experiments were carried out to investigate characteristics of flow instability of forced-convection in vertical narrow annuli. Using distilled water as work fluid, the experiments were conducted at pressures of 1.0∼3.0MPa, mass flow rates of 3.0∼25kg/h, heating power of 3.0∼ 6.5kW and inlet fluid temperature of 20 °C, 40 °C or 60°C. It was found that flow instability occured with fixed inlet condition and heating power when mass flow rate was below a special value. Effects of inlet subcooling, system pressure and mass flow rate on the system behavior were studied. The instability region is given, which has satisfactory agreement with results of the calculation based on the assumption of homogenous two-phase flow and thermodynamic equilibrium of the phases.
Skip Nav Destination
16th International Conference on Nuclear Engineering
May 11–15, 2008
Orlando, Florida, USA
Conference Sponsors:
- Nuclear Engineering Division
ISBN:
0-7918-4816-7
PROCEEDINGS PAPER
Research on Flow Instability in Vertical Narrow Annuli
G. P. Wu
G. P. Wu
Jiangsu University, Zhenjiang, China
Search for other works by this author on:
G. P. Wu
Jiangsu University, Zhenjiang, China
Paper No:
ICONE16-48595, pp. 639-644; 6 pages
Published Online:
June 24, 2009
Citation
Wu, GP. "Research on Flow Instability in Vertical Narrow Annuli." Proceedings of the 16th International Conference on Nuclear Engineering. Volume 3: Thermal Hydraulics; Instrumentation and Controls. Orlando, Florida, USA. May 11–15, 2008. pp. 639-644. ASME. https://doi.org/10.1115/ICONE16-48595
Download citation file:
7
Views
Related Proceedings Papers
Related Articles
Critical Heat Flux and Heat Transfer Transition for Subcooled Flow Boiling
J. Heat Transfer (February,1991)
Heat Transfer Augmentation Through Wall-Shape-Induced Flow Destabilization
J. Heat Transfer (May,1990)
Related Chapters
Hydraulic Resistance
Heat Transfer & Hydraulic Resistance at Supercritical Pressures in Power Engineering Applications
Heat Transfer Enhancement by Using Nanofluids in Laminar Forced Convection Flows Considering Variable Properties
Proceedings of the 2010 International Conference on Mechanical, Industrial, and Manufacturing Technologies (MIMT 2010)
Climate Control Isn't Natural
Hot Air Rises and Heat Sinks: Everything You Know about Cooling Electronics Is Wrong