Local heat transfer behavior and its impact on a single-row, annularly finned tube heat exchanger
- Univ. of Illinois, Urbana-Champaign (United States)
Experimental studies of the local mass transfer characteristics of annularly finned tubes in crossflow are presented. Variations due to boundary layer development, forward-edge separation, the tube wake, horseshoe vortices, and tip vortices are discussed. In addition, regularly located local maxima in mass transfer rates associated with the horseshoe vortex system are found, and conjecture as to their mechanism is offered. Inferring heat transfer behavior from the mass transfer results, we find that the true fin efficiency is always less than that obtained with an assumed constant convective heat transfer coefficient. The difference is 3-7 percent for high-conductivity materials such as aluminum alloys, and 9-17 percent for low-conductivity materials such as mild steels. 26 refs., 7 refs., 2 tabs.
- OSTI ID:
- 5999335
- Journal Information:
- Journal of Heat Transfer (Transactions of the ASME (American Society of Mechanical Engineers), Series C); (United States), Vol. 115:1; ISSN 0022-1481
- Country of Publication:
- United States
- Language:
- English
Similar Records
Conjugate heat transfer of a finned tube. Part A: Heat transfer behavior and occurrence of heat transfer reversal
Conjugate heat transfer of a finned tube. Part B: Heat transfer augmentation and avoidance of heat transfer reversal by longitudinal vortex generators
Related Subjects
HEAT EXCHANGERS
ENERGY CONSERVATION
HEAT TRANSFER
MASS TRANSFER
ALUMINIUM BASE ALLOYS
CONVECTION
STEELS
VORTEX FLOW
ALLOYS
ALUMINIUM ALLOYS
ENERGY TRANSFER
FLUID FLOW
IRON ALLOYS
IRON BASE ALLOYS
320106* - Energy Conservation
Consumption
& Utilization- Building Equipment- (1987-)
320303 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Equipment & Processes