Effect of micro-sized vapor bubbles on heat transfer at different heater temperature rise rate

A. A. Levin, P. V. Khan

L. A. Melentiev Energy Systems Institute, Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia

Abstract: The paper presents the results of an experimental study of the dynamics of boiling of a subcooled liquid flow at heater temperature rise rates from 250 K/s to 19 000 K/s and subcooling level from 23 to 103 K. The effect of temperature conditions on the relative fraction of bubbles smaller than 50 $\mu$m is studied. A significant contribution of microbubbles at deep subcooling of the liquid and high rate of temperature rise of the heater surface was revealed.

Keywords: nucleate boiling, microbubbles, non-steady heating.

Received: 10.10.2023
Revised: 13.11.2023
Accepted: 13.11.2023

DOI: 10.61011/PJTF.2024.04.57095.19762

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