Heat-transfer augmentation in rod bundles near grid spacers

Journal Article · Mon Feb 01 04:00:00 EST 1982 · J. Heat Transfer; (United States)

DOI:https://doi.org/10.1115/1.3245071· OSTI ID:6430547

Yao, S C; Hochreiter, L E; Leech, W J

Heat-transfer augmentation by straight grid spacers in rod bundles is studied for single-phase flow and for post-critical heat flux dispersed flow. The heat transfer effect of swirling grid spacers in single-phase flow is also examined. Governing heat-transfer mechanisms are analyzed, and predictive formulations are established. For single-phase flow, the local heat transfer at a straight spacer and at its upstream or downstream locations are treated separately. The effect of local velocity increasing near swirling spacer is considered. For post critical heat flux (CHF) dispersed flow, the heat transfer by thermal radiation, fin cooling, and vapor convection near the spacer are calculated. The predictions are compared with experimental data with satisfactory agreement.

• Research Organization: Associate Professor, Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania, Mem. ASME
• OSTI ID: 6430547
• Journal Information: J. Heat Transfer; (United States), Journal Name: J. Heat Transfer; (United States) Vol. 104:1; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
AUGMENTATION
ELECTRODES
ENERGY TRANSFER
GRIDS
HEAT FLUX
HEAT TRANSFER
ROD BUNDLES
SPACERS