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<p>An experimental investigation is conducted on a specific boiling regime of a subcooled water flow, leading to the formation of superintensive heat exchange with a metal heater. To analyze the influence of surface modification, several heaters with different micro-geometries were used: a smooth one with <i>R</i><sub>c</sub> = 0.5 µm and a modified one processed using laser ablation. In the latter case, the surface micro-relief is characterized by a roughness of <i>R</i><sub>c</sub> = 10 µm, as well as the presence of cylindrical protrusions with a height and diameter of 200 µm. The experiments were carried out in a vertical channel at an initial pressure of 0.29 MPa, a maximum heater temperature of 450 °C, and an average flow velocity of 0.52 m/s.</p>

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Experimental study of unstable film boiling on a modified heating surface

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • A. A. Levin,
  • P. V. Khan,
  • A. S. Safarov,
  • I. A. Filatov,
  • M. K. Moskvin

摘要

An experimental investigation is conducted on a specific boiling regime of a subcooled water flow, leading to the formation of superintensive heat exchange with a metal heater. To analyze the influence of surface modification, several heaters with different micro-geometries were used: a smooth one with Rc = 0.5 µm and a modified one processed using laser ablation. In the latter case, the surface micro-relief is characterized by a roughness of Rc = 10 µm, as well as the presence of cylindrical protrusions with a height and diameter of 200 µm. The experiments were carried out in a vertical channel at an initial pressure of 0.29 MPa, a maximum heater temperature of 450 °C, and an average flow velocity of 0.52 m/s.