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首页> 外文期刊>International Journal of Heat and Mass Transfer >Water jet impingement boiling from structured-porous surfaces
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Water jet impingement boiling from structured-porous surfaces

机译：从结构化多孔表面沸腾的水射流撞击

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摘要

Structured-porous surfaces were created by diffusion bonding a single layer or multiple layers of highly conductive copper wire mesh screen onto plain heat transfer base surfaces. Flow boiling heat transfer experiments were then conducted with a liquid water jet impinging onto those porous copper surfaces under atmospheric pressure. For comparison, experiments of jet impinging on a plain copper surface were also conducted. The effect of jet Reynolds number, jet inlet subcooling, and porous layer thickness on boiling heat transfer were explored. Surface ageing and data repeatability were also discussed. The results show that a base surface heat flux of 674 W/cm~2 was reached at a superheat of 5 K and a jet Reynolds number of 10,000 with a four-layer 200-mesh test surface. Compared to jet impinging on a plain copper surface under identical working conditions, a fourfold performance enhancement was obtained in increasing heat transfer from the base surface.
机译：通过将单层或多层高导电性铜丝网筛网扩散粘合到普通的传热基础表面上，可以形成结构化的多孔表面。然后用液态水射流在大气压下撞击那些多孔铜表面进行沸腾传热实验。为了进行比较，还进行了喷射冲击在纯铜表面上的实验。探索了射流雷诺数，射流入口过冷和多孔层厚度对沸腾传热的影响。还讨论了表面老化和数据可重复性。结果表明，在四层200目试验表面下，过热度为5 K，射流雷诺数为10,000时，基表面热通量达到674 W / cm〜2。与在相同的工作条件下在纯铜表面上进行射流撞击相比，在增加从底表面传热的过程中获得了四倍的性能提升。

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