本文讨论了表面几何形状和倾角对降膜蒸发性能的影响。在15.5℃±0.5℃（59.9℉±0.9℉）和10.5℃±0.5℃（50.9℉±0.9℉）系统温度下，使用制冷剂R-141b在平板和翅片板上进行降膜蒸发实验。在倾斜角度在10°和40°之间的情况下测试两块板，热通量在17.9 kW/m2（5674 Btu/h·ft2）和45.7 kW/m2（14486 Btu/h·ft2）之间变化。对于R-141b和R-134a，翅片表面的降膜蒸发传热性能均优于平面表面。对于R-141b，翅片表面产生1。 平面传热系数的5~1.8倍。对于R-134a，翅片的蒸发传热增强了2.5~4.8倍。目视观察表明，翅片表面的气泡形核比平面表面的气泡形核更明显。对于R-134a和R-141b中的翅片B表面，传热系数随着倾角的增加而增加。在R-141b的平面上未发现明显的倾斜影响。单位:双引文:ASHRAE交易，第113卷，第。2.

This paper discusses the effects of surface geometries and inclination angle on falling film evaporation performance. Falling film evaporation experiments were conducted on a plain plate and a finned plate using refrigerants R-141b at 15.5°C±0.5°C (59.9°F±0.9°F) and R-134a at 10.5°C±0.5°C (50.9°F±0.9°F) system temperature. Both plates were tested with an inclination angle between 10° and 40°, and the heat fluxes were varied between 17.9 kW/m2(5674 Btu/h·ft2) and 45.7 kW/m2(14486 Btu/h·ft2). The finned surface yielded better falling film evaporation heat transfer performance than the plain surface for both R-141b and R-134a. For R-141b, the finned surface yielded 1.5~1.8 times the heat transfer coefficients of the plain surface. For R-134a, the evaporative heat transfer was enhanced 2.5~4.8-fold with the fins. The visual observation showed that bubble nucleation was more pronounced on the finned surface than on the plain surface. For the Fin-B surface in both R-134a and R-141b, the heat transfer coefficient increased as the inclination angle increased. No significant effect of inclination was found on plain surface for R-141b.Units: Dual