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Languages : en
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Book Description
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 the mean Rayleigh number (anti Ra/sub .delta./) varying from 4.54 x 104 to 0.915 x 106 (.delta. is the local gas width). The data correlation for the mean Nusselt and Rayleigh numbers is given by anti Nu/sub .delta./ = 0.183 anti Ra/sub .delta./° 31°.
