A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is 54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mm respectively. The blades occupy 12% of the impeller area and the water is assumed to enter the impeller radially. Suction and delivery pipes are equal in size. Determine: a) If the pump has a mechanical efficiency of 80%, calculate the blade velocity at outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle
A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300
kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is
54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mm
respectively. The blades occupy 12% of the impeller area and the water is assumed to
enter the impeller radially. Suction and delivery pipes are equal in size.
Determine:
a) If the pump has a
outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the
guide vane angle. (Hint - Substitution: Write Vwo in terms of Uo sub in Euler equation only
unknown then is solve for Vwo)
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