HEAT TRANSFER WITH TURBULENT FLOW IN CONCENTRIC AND ECCENTRIC ANNULI WITH CONSTANT AND VARIABLE HEAT FLUX

Thesis/Dissertation · Sun Dec 31 23:00:00 EST 1961

OSTI ID:4760418

Yan Wood, E; Leung,

The problem of heat transfer to fuliy established turbulent flow in concentric and eccentric annuli with constant and variable heat flux was investigated. Experimentai apparatus was constructed for air flow in electrically heated circular tube annuli with radius ratios from 0.192 to 0.500. Experimentaly determined coefficients of heat transfer with turbulent air-flow (Pr = 0.70) in concentric annuli with constant longitudinal heat flux from either surface are presented for the Reynolds number range of 10000 to 150000. Experimental data for the eccentric annuli experiments covered the radius ratio of 0.255 and 0.500, with the eccentricity parameter range from 0 to 0.92. The energy equation for a fully developed temperature profile and constant heat flux was integrated numerically, using assumed fully developed velocity and thermal diffusivity profiies based on the best available data in the literature. The anaiysis yielded heat transfer coefficients covering the radius ratio range from 0.10 to 1.0, the Prandtl number range from 0 to 1000, and the Reynoids number range from 10/sup 4/ to 10/sup 6/. Experiments for heating from both walls of the annular passage were conducted, and the resuits of the experiments are compared with the predictions of the superposition method. (P.C.H.)

• Research Organization: Originating Research Org. not identified
• NSA Number: NSA-17-012435
• OSTI ID: 4760418
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
ANNULAR SPACE
CONFIGURATION
DIFFERENTIAL EQUATIONS
DISSERTATION
DISTRIBUTION
ELECTRICITY
ENGINEERING AND EQUIPMENT
EQUATIONS
FLUID FLOW
GAS FLOW
HEAT TRANSFER
HEATING
INTEGRALS
LABORATORY EQUIPMENT
NUMERICALS
PRANDTL NUMBER
REYNOLDS NUMBER
SPACERS
SURFACES
TEMPERATURE
THERMAL DIFFUSION
THERMODYNAMICS
TUBES
TURBULENCE
VELOCITY