最佳倾角 meaning in English

optimum angle of incidence
optimum angle of inclination
optimum tilt angle

The optimum inclination angle is between 15 ~ 20 , the length of thermosyphon will not change the phase - change heat transfer coefficient of the evaporation section and the condensation , which will enlarge heat transfer area of thermosyphon and increase the heat exchange capacity . the head - on speed of wind only stranger the heat transfer of the evaporation section and the condensation section . the experiment shows that the mathematic model closely fits to the thermosyphon , moreover , the one key to resolve the thermosyphon effect lies in decreasing the thermoresistance of evaporating section and condensation section . this study can provide directions and experience in the future research
倾斜角越大,热虹吸管总热阻越大,最佳倾角在15 20之间;充液率过多或过少都会对传热性能产生不利影响,对于本实验采用的1 . 75m 、 2m 、 2 . 5m 、 3m热虹吸管,最佳充液率在20 % 35 %之间;管长对传热也有影响,管长不改变热虹吸管蒸发段和冷凝段的换热系数,只增加了热虹吸管的换热面积,增大换热量;迎面风速的大小,起到强化热虹吸管蒸发段和冷凝段换热的目的。