EFFECT OF VIBRATION ON THE HEAT TRANSFER RATE FROM CYLINDERS IN FREE CONVECTION IN AIR
Abstract
The study was a follow-on investigation of the effects of sinusoidal vibration on the heat transfer rate from cylinders in free convection in air. The purpose was to obtain and correlate heat transfer data in the region of the critical Reynolds number, to investigate the effect of the vibration at higher Reynolds numbers through the use of a larger diameter cylinder, and to obtain Schlieren photographs of the boundary layer in the vicinity of the critical Reynolds number. Results show that each cylinder displays a similar characteristic pattern progressing from a region in which the heat transfer rate is independent of vibration, through a transition region, to a region where the heat transfer rate generally parallels the recommended forced convection curve of McAdams and is a function only of the vibration intensity. An increased frequency shifts the transition region in the direction of higher vibration intensities. Schlieren photographs show a considerable increase in turbulence in the boundary layer through the transition region.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1966
- Accession Number
- AD0635976
Entities
People
- Leon H. Chaffee
Organizations
- Air Force Institute of Technology