Host: The Japan Society of Mechanical Engineers
Name : The 30th International Conference on Nuclear Engineering (ICONE30)
Date : May 21, 2023 - May 26, 2023
This paper numerically studied natural convection heat transfer augmentation from a local heat source placed in a vertical annular channel, using annular fins. The effects of fin spacing, fin span, and fin arrangement were investigated at constant wall heat flux boundaries. The results of the present analyses indicated that heat transfer rates had a strong dependence on fin spacing (number of fins) and fin span. The fin span was varied from 4.5% to 18% of the annular gap. On increasing the fin span at a particular fin spacing, the heat transfer coefficient increased continuously. When the fin span was largest in the middle section of the heat source, heat transfer was increased by 18%, while it increased by 19% for the uniformly spanned fins of the span l = 0.18b . The results of this study may serve as a reference resource for the thermal design of an intricate air-cooled passive system.
