Experimental study of the steady natural convection in a horizontal annulus with irregular boundaries
Abstract
The natural convective heat transfer across an annulus with irregular boundaries was studied using a Mach-Zehnder interferometer. The annulus was formed by an inner hexagonal cylinder and an outer concentric circular cylinder. This configuration models, in two dimensions, a liquid metal fast breeder reactor spent fuel subassembly inside a shipping container. During the test, the annulus was filled with a single gas, either neon, air, argon, krypton, or xenon, at a pressure of about 0.5 MPa. From temperature measurements, both local and mean Nusselt numbers (Nu/sub delta/) at the surface of the inner cylinder were evaluated, with mean Rayleigh number (anti Ra/sub delta/) varying from 4.54 X 10 to the 4th power to 0.915 x 10 to the 6th power (delta is the local gas width).
- Publication:
-
Presented at the 19th Natl. Heat Transfer Conf
- Pub Date:
- 1980
- Bibcode:
- 1980nht..conf.....B
- Keywords:
-
- Annuli;
- Concentric Cylinders;
- Convective Heat Transfer;
- Horizontal Orientation;
- Nusselt Number;
- Spent Fuels;
- Circular Cylinders;
- Hexagons;
- Liquid Metal Fast Breeder Reactors;
- Mach-Zehnder Interferometers;
- Rayleigh Number;
- Temperature Measurement;
- Fluid Mechanics and Heat Transfer