Optimum profiles for asymmetrical longitudinal fins in annular ducts
In the present work the geometry of annular ducts with asymmetrical longitudinal fins is optimized in order to enhance the heat transfer under laminar coolant flow conditions. The heat transferred is also maximized for a given amount of material or hydraulic resistance. Polynomial profiles are assigned to the two lateral fin surfaces. Velocity and temperature distributions on the annular duct cross section are determined with the help of a finite-element model. A global heat transfer coefficient and an equivalent Nusselt number are then calculated. Lastly, optimum asymmetrical fins obtained by means of a genetic algorithm are shown for different situations and their performance is compared with those of optimum symmetrical fins.
- Research Organization:
- Univ. degli studi di Bologna (IT)
- OSTI ID:
- 20075637
- Journal Information:
- Heat Transfer Engineering, Vol. 21, Issue 2; Other Information: PBD: Mar-Apr 2000; ISSN 0145-7632
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analysis of combined natural and forced convection in vertical semicircular ducts with radial internal fins
Design and Optimization of a Gas-Cooled, Airfoil Fin Microchannel Heat Exchanger