表面形貌对沸腾换热影响的实验研究

以去离子水为工质，通过实验研究了外形尺寸为16 mm×24 mm，表面为紫铜光面、120目砂纸打磨表面、腐蚀表面及槽道表面上的池沸腾换热现象。结果表明，4个换热面上的换热热流密度随着ΔT的增大而增大，腐蚀表面、砂纸打磨表面及槽道表面的沸腾换热均强于光滑面，轻微腐蚀更有利于沸腾换热；当ΔT<4 ℃时，4个换热面均无气泡产生；当ΔT=6 ℃时，120目砂纸打磨面具有比槽道面更好的沸腾换热效果。

Experimental research on the impact of surface morphology on boiling heat transfer

We experimentally investigate pool boiling heat transfer on four 16 mm×24 mm sized copper plane, 120 mesh sand paper polished surface, corroded metal surface and micro channels surface with de ionized water as working fluid. Results show that heat transfer flux density increases with the increase of temperature difference ΔT for the four heat transfer surfaces. The boiling heat transfer of the copper plane is less than that of the other three surfaces, so slightly corroded surface is more benefit for boiling heat transfer. No bubbles generate on the four surfaces when ΔT<4 ℃. Boiling heat transfer of 120 mesh sand paper polished surfaceis greater than that of micro channels surface when ΔT=6 ℃.