A test is to be performed on a proposed design for a large p
A test is to be performed on a proposed design for a large pump that is to deliver 1.5 m Vs of water from a 40 cm diameter pump impeller with a pressure rise of 400 kPa. It a model using water at the same conditions the large pump is to operate uses an 8 cm diameter impeller, what flow- rate should be used and what pressure rise should the model be expected to provide..
Solution
FLOW RATE IS DIRECTLY PROPORTIONAL TO DIA
SINCE DIA IS REDUCED BY 5 TIMES FLOW RATE IS =1.5/5 = .3m^3/s Ans
force remains same
Initial force = final force
400*40^2 = p*8^2
p=10000 kPa
