The Convective Heat Transfer Behavior of a Heated Cylinder Located near a Plane Surface.

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Abstract:

An experimental apparatus which will allow the study of the influence of ground effects on a heated cylinder placed in a crossflow of air was designed and constructed. The effects of a wall on the heat transfer characteristics of a heated cylinder were investigated at a Reynolds number of 153,000 for cylinder to wall spacings ranging from dr 0.0 to dr 5.33 maximum, where d gap width, and r cylinder radius. Pressure coefficients were obtained at five degree intervals around the cylinder for each experiment. Experimental results obtained for dr 0.0 agreed well with previously reported investigations of a cylinder attached to a wall. Results obtained for dr 5.33 agreed well with previous work done with free cylinders. Experiments conducted at intermediate values of dr resulted in minimum and maximum average Nusselt numbers, suggesting that gap spacing may exert a strong influence on the behavior of the flow field.

Author(s):
Gnerlich, Charles Henry
Author Organization(s):
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
Descriptive Note:
Master's thesis,
Pagination:
0073

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Subject Terms
Joint Capability Areas:
JCA_8.1_Communicate; JCA_8_Building Partnerships; JCA_8.1.1_Inform Domestic and Foreign Audiences; JCA_8.1.3_Influence Adversary and Competitor Audiences
Communities of Interest:
Air Platforms
Descriptor(s):
*HEAT TRANSFER, *CYLINDRICAL BODIES, *FLUID DYNAMICS, AIR FLOW, TEST METHODS, THESES, FLOW FIELDS, WIND TUNNEL TESTS, WALLS, SUBSONIC CHARACTERISTICS, CONVECTION(HEAT TRANSFER), TEST FACILITIES, DYNAMIC PRESSURE, HOT WIRE ANEMOMETERS, FLAT PLATE MODELS, CROSS FLOW, GROUND EFFECT
Field(s)/Group(s):
Test Facilities, Equipment and Methods, Acoustics, Fluid Mechanics
Keyword(s):
Nusselt number
Report Date:
1975 Jun 01