Features of heat transfer and phase-change on a pinned surface at pulse heat release
An experimental study was conducted of the boiling characteristics of water subcooled to the saturation temperature during pulsed heating on a smooth surface with a technical roughness of up to 5 μm and on a modified surface with cylindrical pins 200 μm in height and diameter, located at the nodes of a rectangular grid with a step of 400 μm, with an upward flow with a pressure of 0.29 MPa and an average flow velocity of 0.52 m/s. It was found that at an initial water temperature of 110°C for a modified surface, the rate of increase in the heater temperature is lower, and the onset time of nucleation is the same as for a smooth surface. For an initial water temperature of 80°C and an average temperature increase rate of about 5000 K/s, it was experimentally shown that the bubbles on the modified surface are larger, but their number and the share of the area occupied by them are significantly lower than on a smooth surface. © The Authors, published by EDP Sciences.
Библиографическая ссылка
Khan P. , Levin A. , Moskvin M. , Safarov A. , Filatov I. Features of heat transfer and phase-change on a pinned surface at pulse heat release // E3S Web of Conferences. Vol.578. ID:01040. 2024. DOI: 10.1051/e3sconf/202457801040
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