The impeller of a centrifugal blower has a radius of 20 cm and a blade width...

Transcribed Image Text:

The impeller of a centrifugal blower has a radius of 20 cm and a blade width of 6 cm at the inlet, and a radius of 30 cm and a blade width of 4 cm at the outlet. The blades of the impeller are swept- back with an angle of 40° at the impeller exit. Air enters radially to the impeller and exits with blade angle relative to the impeller. If the impeller is rotating at 850 rpm and consumes a shaft power of 110 W. Find the mass flow rate m of air passing through the impeller. Suppose that the flow rate is varied while the rotation rate is kept constant. Calculate and plot the shaft power consumed vs. mass flow rate for mass flow rates of 0.33m, 0.67m, 1.33m, 1.67 mand 2.00 m. The impeller of a centrifugal blower has a radius of 20 cm and a blade width of 6 cm at the inlet, and a radius of 30 cm and a blade width of 4 cm at the outlet. The blades of the impeller are swept- back with an angle of 40° at the impeller exit. Air enters radially to the impeller and exits with blade angle relative to the impeller. If the impeller is rotating at 850 rpm and consumes a shaft power of 110 W. Find the mass flow rate m of air passing through the impeller. Suppose that the flow rate is varied while the rotation rate is kept constant. Calculate and plot the shaft power consumed vs. mass flow rate for mass flow rates of 0.33m, 0.67m, 1.33m, 1.67 mand 2.00 m.

Answer rating: 100% (QA)

1 Calculate blade speed at inlet Impeller rotation rate N 850 rpm Convert rpm to rads N 850 ... View the full answer