An impeller rotating at 1200 r.p.m. with the following dimensions (b₁ = 1.5 inc., b₂ = 1.0 in., D₁ = 5 in., D₂ = 15 in.,

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An Impeller Rotating At 1200 R P M With The Following Dimensions B 1 5 Inc B 1 0 In D 5 In D 15 In 1 (34.99 KiB) Viewed 30 times

An impeller rotating at 1200 r.p.m. with the following dimensions (b₁ = 1.5 inc., b₂ = 1.0 in., D₁ = 5 in., D₂ = 15 in., ₁ = 15°, B₂= 20°, b, and b, are the passage widths at the inlet and outlet with cross-section area A = Db). The impeller develops an actual head of 80 ft and delivers 1000 gpm at the point of maximum efficiency requiring 30 b. hp.c Mechanical losses in the bearings and packing is 5% of the b. hp. and disk friction in 1.5 hp. and leakage loss is 50 gpm. Assuming radial inlet flow and neglecting vane thickness. a) b) c) g) draw the virtual velocity diagrams at the inlet and outlet and evaluate all the velocities and angles. virtual head neglecting the circulatory flow overall pumn efficiency. volumetric erficiency v hydraulic efficiency Hv circulatory flow factor 1. M (52 42