Q1/ A centrifugal pump operates is discharging 2378 liters of water per minute against head of 60 m and rotates at 350 rpm. The vanes are curved back at an angle of 40 at outer periphery. The normal component of velocity of flow at outlet is 0.34 times the corresponding impeller speed. Determine diameter of the impeller. Assume radial entry flow. Q2/ A Francis radial-flow hydroturbine (inward) has the following dimensions: r2=3.2 m, ri=1.25 m, b2=0.85 m, and b1=2.10 m. The runner blade angles are B2= 66° and B1= 18.5° at the turbine inlet and outlet, respectively. The runner rotates at N=180 rpm. The volume flow rate at design conditions is 84 m3/s. Irreversible losses are neglected in this preliminary analysis. Calculate the angle az through which the wicket gates should turn the flow, where az is measured from the radial direction at the runner inlet. Calculate the swirl angle aı, where ai is measured from the radial direction at the runner outlet. Predict the power output (MW) and required net head (m).

Q1/ A centrifugal pump operates is discharging 2378 liters of water per minute against head of 60 m and rotates at 350 rpm. The vanes are curved back at an angle of 40 at outer periphery. The normal component of velocity of flow at outlet is 0.34 times the corresponding impeller speed. Determine diameter of the impeller. Assume radial entry flow. Q2/ A Francis radial-flow hydroturbine (inward) has the following dimensions: r2=3.2 m, ri=1.25 m, b2=0.85 m, and b1=2.10 m. The runner blade angles are B2= 66° and B1= 18.5° at the turbine inlet and outlet, respectively. The runner rotates at N=180 rpm. The volume flow rate at design conditions is 84 m3/s. Irreversible losses are neglected in this preliminary analysis. Calculate the angle az through which the wicket gates should turn the flow, where az is measured from the radial direction at the runner inlet. Calculate the swirl angle aı, where ai is measured from the radial direction at the runner outlet. Predict the power output (MW) and required net head (m).

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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