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1. A reaction turbine works at 450 rpm under a head of 120 m. Its diameter at inlet is 1.2 m and the flow area is 0.4 m2. The angle made by the absolute and relative velocities at inlet are 20° and 60° respectively with the tangential velocity. Determine (i) the discharge through the turbine (ii) power developed (ii) efficiency. Assume radial discharge at outlet.

1. A reaction turbine works at 450 rpm under a head of 120 m. Its diameter at inlet is 1.2 m and the flow area is 0.4 m2. The angle made by the absolute and relative velocities at inlet are 20° and 60° respectively with the tangential velocity. Determine (i) the discharge through the turbine (ii) power developed (ii) efficiency. Assume radial discharge at outlet.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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Problems: 1. A reaction turbine works at 450 rpm under a head of 120 m. Its diameter at inlet is 1.2 m and the flow area is 0.4 m2. The angle made by the absolute and relative velocities at inlet are 20° and 60° respectively with the tangential velocity. Determine (i) the discharge through the turbine (ii) power developed (i) efficiency. Assume radial discharge at outlet. 2. A Francis turbine has inlet wheel diameter of 2 m and outlet diameter of 1.2 m. The runner runs at 250 rpm and water flows at 8 cumecs. The blades have a constant width of 200 mm. If the vanes are radial at inlet and the discharge is radially outwards at exit, make calculations for the angle of guide vane at inlet and blade angle at outlet Prof. Dr. Tahseen Ahmad Tahseen (University of Kirkuk)
Transcribed Image Text:Problems: 1. A reaction turbine works at 450 rpm under a head of 120 m. Its diameter at inlet is 1.2 m and the flow area is 0.4 m2. The angle made by the absolute and relative velocities at inlet are 20° and 60° respectively with the tangential velocity. Determine (i) the discharge through the turbine (ii) power developed (i) efficiency. Assume radial discharge at outlet. 2. A Francis turbine has inlet wheel diameter of 2 m and outlet diameter of 1.2 m. The runner runs at 250 rpm and water flows at 8 cumecs. The blades have a constant width of 200 mm. If the vanes are radial at inlet and the discharge is radially outwards at exit, make calculations for the angle of guide vane at inlet and blade angle at outlet Prof. Dr. Tahseen Ahmad Tahseen (University of Kirkuk)
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