Method for designing a multiblade radial fan and a multiblade radial fan

摘要

PCT No. PCT/JP96/02391 Sec. 371 Date Apr. 18, 1997 Sec. 102(e) Date Apr. 18, 1997 PCT Filed Aug. 27, 1996 PCT Pub. No. WO97/08463 PCT Pub. Date Mar. 6, 1997Specifications of the impeller and the scroll type casing of a multiblade radial fan comprising an impeller having numerous radially directed blades circumferentially spaced from each other and a scroll type casing accommodating the impeller are determined so as to make divergence angle of the scroll type casing substantially coincide with divergence angle of the free vortex formed by the air discharged from the impeller.