Experimental study of heat transfer from a yawed cylinder to air with a constant wall heat flux

Technical Report · Wed Aug 01 04:00:00 EDT 1979

OSTI ID:6104258

Pura, C A

The heat transfer from a yawed cylinder to air for constant wall heat flux boundary condition has been studied experimentally. Yaws of 0/sup 0/, 20/sup 0/, 40/sup 0/, and 60/sup 0/ were used with a Reynolds number based on a freestream velocity of 1.1 x 10/sup 5/. This research included the design of the apparatus, numerical determination of heat conduction within the cylinder, comparison of normal (0/sup 0/) results with previously published results, and obtaining data for the yaws mentioned above. The desired thermal boundary condition was obtained with electrical heating of a very thin coating of conductive silver paint which was applied to a thin plastic cylinder. The variation in electrical resistance of this coating was found to range from + 2-1/2 to + 4-1/2%. Numerical modeling revealed that interior heat conduction effects in this design are significant only near the region of separation. The results for the yawed tests support the independence principle in the boundary layer for all yaws used. The position of the point of minimum heat transfer at 60/sup 0/ yaw was observed to shift slightly toward the rear relative to other yaws.

• Research Organization: Sandia Labs., Albuquerque, NM (USA)
• DOE Contract Number: EY-76-C-04-0789
• OSTI ID: 6104258
• Report Number(s): SAND-79-8022
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420400* -- Engineering-- Heat Transfer & Fluid Flow
AIR
CYLINDERS
DATA
DATA FORMS
ENERGY TRANSFER
EXPERIMENTAL DATA
FLUID FLOW
FLUIDS
GAS FLOW
GASES
GRAPHS
HEAT TRANSFER
HEATING
INFORMATION
MEASURING METHODS
NUMERICAL DATA
NUSSELT NUMBER
ORIENTATION
REYNOLDS NUMBER
TABLES
TEMPERATURE DISTRIBUTION