Scholarlink

<p>Transpiration cooling provides high efficiency with low coolant consumption by allowing fluid to pass through a porous structure. However, conventional porous materials often experience vapor blockage during phase change, which limits coolant flow and causes local cooling imbalance. This study experimentally investigates the transpiration cooling performance of 3D-printed lattice structures in an open hot-air wind tunnel. Also, the effects of the coolant temperature controlled by a heat exchanger and varying blowing ratios are evaluated. The study reveals that lowering the coolant temperature with a heat exchanger effectively suppresses vapor formation and eliminates instability. This stabilization leads to significant improvements in cooling efficiency from ∼65 % to ∼95 %. The diagonal structure shows the most uniform cooling because its intermediate permeability allows smooth coolant flow without vapor accumulation. In comparison, the octa radial and pyramidal structures exhibit overheating under low or high permeability. The findings in this study support tailored coolant optimization for each geometry.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Experimental investigation into the effect of coolant temperature on transpiration cooling in lattice structures

  • 期刊论文

  • 发表日期：

    2026年2月10日

查看全文
  • Jaeseung Heo,
  • Jaehan Cho,
  • Reynolds Addo-Akoto,
  • Jinung Lee,
  • Sung Jin Kim,
  • Jae-Hung Han

摘要

Transpiration cooling provides high efficiency with low coolant consumption by allowing fluid to pass through a porous structure. However, conventional porous materials often experience vapor blockage during phase change, which limits coolant flow and causes local cooling imbalance. This study experimentally investigates the transpiration cooling performance of 3D-printed lattice structures in an open hot-air wind tunnel. Also, the effects of the coolant temperature controlled by a heat exchanger and varying blowing ratios are evaluated. The study reveals that lowering the coolant temperature with a heat exchanger effectively suppresses vapor formation and eliminates instability. This stabilization leads to significant improvements in cooling efficiency from ∼65 % to ∼95 %. The diagonal structure shows the most uniform cooling because its intermediate permeability allows smooth coolant flow without vapor accumulation. In comparison, the octa radial and pyramidal structures exhibit overheating under low or high permeability. The findings in this study support tailored coolant optimization for each geometry.