Abstract
The effect of heated length on the Critical Heat Flux (CHF) of subcooled flow boiling with water was experimentally investigated by using a direct current heated tube made of stainless steel, a part of whose wall thickness was axially made thin for realizing nonuniform heat flux conditions. The higher enhancement of the CHF was derived for the shorter tube length. The effective heated length was determined for the tube under axially nonuniform heating conditions. When a lower heat flux part below the Net Vapor Generation (NVG) heat flux exists at the middle of the tube length, the effective heated length becomes the tube length downstream of the lower heat flux parts. However, when the lower heat flux part is above the NVG, the effective heated length is the full tube length. © 2000 Scripta Technica, Heat Trans Asian Res, 29(2): 144–154, 2000
Published Version
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