本研究项目的目标是获得直径为30的单宽单入口后倾（BI）/翼型离心风机的空气和声音的测量进气系统效果。本项目中测试的入口配件是五种不同的法兰轴承和枕木轴承，带有支架和十四个不同宽度和高度的模拟机柜。在所有受控入口条件下，以三种不同的速度对风扇进行了测试。这些测量是在芝加哥的空气运动与控制协会（AMCA）国际实验室进行的。

The objective of this research project is to obtain a body of measured inlet system effects for both air and sound for a single width single inlet backward inclined (BI) / Airfoil centrifugal fan of 30 in diameter. The inlet appurtenances tested in this project are five different bearings of flange and pillowblock types with their supports and fourteen simulated cabinets at various widths and heights. The fan was tested at three different speeds for all controlled inlet conditions. The measurements were made at the Air Movement and Control Association (AMCA) International laboratory in Chicago.