抄録
The width of cross flow fan impeller can readily be changed depending on its usage. The effect of the width on the cross flow fan characteristics however is not fully understood yet. In this study three types of extremely short impellers are produced and their performance and noise level are experimentally investigated. In addition, three kinds of casings with different shape are used for the measurements. High fan performance and low noise level can be achieved for a given impeller by choosing adequate casing shape.
