叶片转动角度对百叶窗浓缩器性能的影响

A Study of the Effect of Blade Rotating Angles on the Performance of a Louver Concentrator

利用百叶窗浓缩器实验系统研究了5级叶片的转动角度对其性能参数(浓淡风比、阻力损失系数和平均浓缩率)的影响。通过对各级叶片转动不同角度实验结果的分析,得出了其性能参数随叶片转动角度改变的变化情况;在各级叶片转角中,阻力系数最大的工况为5级叶片全部为30°;浓淡风比最大的工况是第一级～第四级叶片角度为30°,第五级叶片为20°;浓缩率最大的工况为5级叶片全部为30°。

By making use of a louver concentrator test system,a study was conducted of the effect of rotating angles of blades in five stages on the performance parameters of the concentrator (dense-thin air ratio R1,resistance loss coefficient D and average concentration rate R2).Through an analysis of test results of blades in various stages rotating at different angles,obtained was a change of the performance parameters caused by the variation of blade rotating angles.Regarding the rotating angles of blades in various stages,the operating condition corresponding to a maximal resistance coefficient was found to be one when all the blades in the fifth stage are rotating at 30 degrees.The operating condition featuring a maximal dense-thin air ratio was one in which the blades in the first to fourth stage are rotating at 30 degrees while the blades in the fifth stage at 20 degrees.The operating condition corresponding to a maximal concentration rate was one when all the blades in the fifth stage are rotating at 30 degrees.