Effect of micro-sized vapor bubbles on heat transfer at different heater temperature rise rate
Levin A.A.
1, Khan P.V.
11Melentiev Energy Systems Institute of Siberian Branch of the Russian Academy of Sciences, Irkutsk, Russia
Email: Lirt@mail.ru, polinakhan@gmail.com
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 μm 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.
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