安装时测量的风机性能数据可能显示性能低于制造商额定值，主要原因是入口或出口连接不当。有人提议，通过系统地改变入口流量成分，对螺旋桨风机的空气和声音性能进行实验测量，以模拟风机的典型“现场”安装。单位:双

Fan performance data measured as installed may show lower performance than manufacturer ratings, primarily because of improper inlet or outlet connections. It was proposed to experimentally measure air and sound performance of propeller fans with systematic variation of inlet flow components, intended to simulate typical “in the field” installations of the fans.Units: Dual