Experimental and analytical study of axial turbulent flows in an interior subchannel of a bare rod bundle

Conference · Sat May 01 00:00:00 EDT 1976 · J. Heat Transfer; (United States)

OSTI ID:7348296

Carajilescov, P ^[1]; Todreas, N E

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1. Instituto Tecnologico de Aeronautica, Sao Jose dos Campos, Brazil

Reactor fuel elements generally consist of rod bundles with the coolant flowing axially through the bundles in the space between the rods. Heat transfer calculations form an important part in the design of such elements, which can only be carried out if information of the velocity field is available. A one-equation statistical model of turbulence is applied to compute the detailed description of velocity field (axial and secondary flows) and the wall shear stress distribution of steady, fully developed turbulent flows with incompressible, temperature-independent fluid, flowing through triangular arrays of rods with different aspect ratios (P/D). Also experimental measurements of the distributions of the axial velocity, turbulence kinetic energy, and Reynolds stresses were performed using a laser Doppler anemometer (LDA), operating in a ''fringe'' mode with forward scattering, in a simulated interior subchannel of a triangular rod array with P/D = 1.123 and L/D/sub H/ = 77. From the experimental results, a new mixing length distribution is proposed. Comparisons between the analytical results and the results of this experiment as well as other experimental data available in the literature are presented. The results are in good agreement.

• OSTI ID: 7348296
• Journal Information: J. Heat Transfer; (United States), Journal Name: J. Heat Transfer; (United States) Vol. 98:2; ISSN JHTRA
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220100* -- Nuclear Reactor Technology-- Theory & Calculation
42 ENGINEERING
420400 -- Engineering-- Heat Transfer & Fluid Flow
ENERGY TRANSFER
FLUID FLOW
FUEL ASSEMBLIES
FUEL CHANNELS
FUEL ELEMENT CLUSTERS
HEAT TRANSFER
MIXING
REACTOR CHANNELS
REACTOR COMPONENTS
ROD BUNDLES
SHEAR
STRESSES
TURBULENT FLOW