A centrifugal blower rotates at 1400 rpm. Air enters into the impelle…

Question

A centrifugal blower rotates at 1400 rpm. Air enters into the impeller normal to the blades and exits at an angle of $25^\circ$. The inlet radius is $r_1 = 56.5\text{ cm}$, and the inlet blade width $b_1 = 58.5\text{ cm}$. The outlet radius and the blade width are $r_2 = 12\text{ cm}$ and $b_2 = 4.5\text{ cm}$, respectively. The volume flow rate is $0.22\text{ m}^3/\text{s}$. What is the net head produced by this blower in meters of air?

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