On the development of turbulent flow in wall subchannels of a rod bundle
Measurements of the mean velocity, wall shear stresses, and turbulence have been performed in a rod bundle of four parallel rods arranged in a rectangular channel (P/D = W/D = 1.148) for three ratios of length-to-hydraulic diameter (L/D/sub h/). Distributions of the mean velocity and the wall shear stresses have been measured in four quadrants for L/D/sub h/ = 48.7, 73.0, and 97.4. The full Reynolds stress tensor has been determined by the hot-wire technique in only one quadrant for each L/D/sub h/ ratio. The Reynolds number of this investigation was Re = 1.17 x 10/sup 5/. The experimental results show that the structure of turbulence does not change significantly between L/D/sub h/ = 48.7 and 97.4. The flow redistribution among the subchannels caused by the inlet conditions, however, is not completed at L/D/sub h/ = 97.4. The experimental wall shear stresses at L/D/sub h/ = 97.4 agree satisfactorily with the wall shear stresses calculated by the VELASCO code.
- Research Organization:
- Kernforschungszentrum Karlsruhe GmbH, Institut fur Neutronenphysik und Reaktortechnik, Postfach 3640, D-7500 Karlsruhe 1 (DE)
- OSTI ID:
- 5457673
- Journal Information:
- Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 77:3; ISSN NUTYB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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99 GENERAL AND MISCELLANEOUS
990220 -- Computers
Computerized Models
& Computer Programs-- (1987-1989)
COMPUTER CALCULATIONS
COMPUTER CODES
FLUID FLOW
FLUID MECHANICS
FUEL CHANNELS
FUEL ELEMENTS
FUEL RODS
HYDRAULICS
MECHANICS
REACTOR CHANNELS
REACTOR COMPONENTS
REYNOLDS NUMBER
ROD BUNDLES
SHEAR
STRESS ANALYSIS
TURBULENT FLOW
V CODES
VELOCITY
WALLS