Accession Number:

AD0691193

Title:

EXPERIMENTAL DETERMINATION OF THE AVERAGE HEAT TRANSFER COEFFICIENT FOR YAW CYLINDERS.

Descriptive Note:

Master's thesis,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF

Personal Author(s):

• Viteri,Marco Antonio

Report Date:

1969-04-01

Pagination or Media Count:

83.0

Abstract:

The heat transfer characteristics of yawed cylinders was measured in an open induction tunnel in the subsonic range. Two model diameters were tested, 0.50 inches and 0.25 inches. The Reynolds number based on cylinder diameter was varied from 2750 to 33200 for the 0.50 inch diameter model and from 1430 to 16700 for the 0.25 inch diameter model. The tests showed a good agreement for both models with the experimental results of other investigators for the normal case, or zero yaw case. As yaw angle was increased from the normal position to about 35 degrees, a peaking in the heat transfer was obtained. As yaw angle was increased further the average Nusselt number decreased. This behavior is attributed to the end effect of the models used whose aspect ratio were limited by the size of the test section. At larger yaw angles there is an agreement of the heat transfer data for models with similar aspect ratio. Author

Descriptors:

• (*CYLINDRICAL BODIES
• *HEAT TRANSFER COEFFICIENTS)
• AIRFRAMES
• YAW
• ANGLE OF ATTACK
• REYNOLDS NUMBER
• WIND TUNNEL MODELS
• MODEL TESTS
• THESES

Subject Categories:

• Aerodynamics
• Fluid Mechanics
• Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE