Accession Number:

AD0610173

Title:

Effect of Vibration on Heat Transfer from Cylinders in Free Convection

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING

Personal Author(s):

• Neely, David F.

Report Date:

1964-08-01

Pagination or Media Count:

75.0

Abstract:

The purpose was to determine the effect of diameter, temperature difference, and vibration intensity on the free convective heat transfer rate from horizontal cylinders subjected to transverse vibrations in air. The diameters of the cylinders were 0.085 and 0.25 inches. They were vibrated over a frequency range of 0 to 88 cycles per second and an amplitude range of 0 to 0. 35 inches. The surface temperature ranged from 138 to 201 degrees Fahrenheit, and the maximum vibration intensity was 29 in.sec. Above vibration intensities of 12 in.sec, the variation of the heat transfer rate for both cylinders followed the forced convection curve recommended by McAdams, and the value of the heat transfer rate was independent of the temperature difference. For a given temperature difference and vibration intensity, the value of the heat transfer rate increased as the cylinder diameter decreased. An interferometer study showed that the boundary layer was turbulent above vibration intensities of 12 in.sec.

Descriptors:

• *CYLINDRICAL BODIES
• *VIBRATION
• *HEAT TRANSFER
• CONVECTION
• TURBULENT BOUNDARY LAYER
• INTERFEROMETERS
• AIR
• TEMPERATURE
• THESES

Subject Categories:

• Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE