论文部分内容阅读
设计了以烧结法制备铜表面多孔层的工艺过程，并以丙酮作为介质，测试了所制备的多孔表面强化管的传热性能．结果表明，表面多孔管显著地强化了沸腾给热．以０．０７４～０．０４６ｍｍ紫铜粉和Ｒ粉的复合粉烧结多孔管为例，当热通量为２．００×１０４～６．８５×１０４ｋＪ／（ｍ２·ｈ），沸腾给热系数可达２．２３×１０４～５．２８×１０４ｋＪ／（ｍ２·ｈ·℃），比普通光滑管提高８～２４倍；总传热系数可达３８００～６２３６ｋＪ／（ｍ２·ｈ·℃），比普通光滑管提高０．７～６倍
The process of preparing the porous copper layer by sintering was designed. The heat transfer performance of the prepared porous surface strengthened tube was tested with acetone as the medium. The results show that the surface porous tube significantly enhances the boiling to heat. For example, the porous tube sintered with composite powder of 0.074 ~ 0.046mm copper powder and R powder, when the heat flux is 2.00 × 104 ~ 6.85 × 104kJ / (m2 · h) Reaching 2.23 × 104 ~ 5.28 × 104kJ / (m2 · h · ℃), which is 8 ~ 24 times higher than that of ordinary smooth tube. The total heat transfer coefficient can reach 3800 ~ 6236kJ / (m2 · h · ℃) Ordinary smooth tube to improve 0.7 to 6 times