TY - JOUR

T1 - Features of heat transfer and phase-change on a pinned surface at pulse heat release

AU - Khan, Polina

AU - Levin, Anatoliy

AU - Moskvin, Mikhail

AU - Safarov, Alexey

AU - Filatov, Ilya

N1 - Conference code: 40

PY - 2024/10/14

Y1 - 2024/10/14

N2 - 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.

AB - 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.

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85211893069&origin=inward&txGid=d8d07b52f8d6be50f7f91cfc5132a3b2

UR - https://www.mendeley.com/catalogue/ff78efc5-fe92-354d-a80f-5992aa9e1f2f/

U2 - 10.1051/e3sconf/202457801040

DO - 10.1051/e3sconf/202457801040

M3 - Conference article

VL - 578

JO - E3S Web of Conferences

JF - E3S Web of Conferences

SN - 2555-0403

M1 - 01040

T2 - Всероссийская конференция с международным участием «XL Сибирский теплофизический семинар», посвященная 110-летию со дня рождения академика С.С. Кутателадзе и 300-летию Российской академии наук

Y2 - 20 August 2024 through 23 August 2024

ER -