Abstract On the bases of many designs and tests , provides the hydraulic design way on computer aideddesign of double-channel impeller, and with some main parameters. Gives the values of inlet speed coefficientKD1 and outlet speed coefficient KD2 , and introduces the ways of calculating radius R1 of front cover board andradius R2 of back cover board. A midline equation of impeller plan channel and a change rule of channelsection area are suggested in this paper for the first time.
MA Hao-Chen-；Liu-Hou-Lin-；Guan-Xing-Fan-；Pei-Jun-. The CAD and Coefficient Statistics on Hydraulic Design ofDouble-channel Impeller[J]. Journal of Drainage and Irrigation Machinery Engin, 2002, 20(2): 15-17.