A Francis turbine is installed with a vertical draft tube. The top of the draft is 1.0 m below the center line of spiral casing while the tail race water level is 3.0 m from the top of the draft tube. There is no velocity of whirl at the top or bottom of the draft tube and leakage are negligible. The elevation of water from the reservoir to the center line of the turbine spiral casing is 50 m, and water velocity at the inlet is 5 m/sec. Discharge is 2.5 cu.m/sec, hydraulic efficiency is 86%, overall efficiency of 83%. Determine the reading of a pressure gage (in psi) if one is installed at the penstock just before the water inlet to the turbine.
A Francis turbine is installed with a vertical draft tube. The top of the draft is 1.0 m below the center line of spiral casing while the tail race water level is 3.0 m from the top of the draft tube. There is no velocity of whirl at the top or bottom of the draft tube and leakage are negligible. The elevation of water from the reservoir to the center line of the turbine spiral casing is 50 m, and water velocity at the inlet is 5 m/sec. Discharge is 2.5 cu.m/sec, hydraulic efficiency is 86%, overall efficiency of 83%. Determine the reading of a pressure gage (in psi) if one is installed at the penstock just before the water inlet to the turbine.
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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A Francis turbine is installed with a vertical draft tube. The top of the draft is 1.0 m below the
center line of spiral casing while the tail race water level is 3.0 m from the top of the draft tube. There is no velocity of whirl at the top or bottom of the draft tube and leakage are negligible. The
elevation of water from the reservoir to the center line of the turbine spiral casing is 50 m, and water
velocity at the inlet is 5 m/sec. Discharge is 2.5 cu.m/sec, hydraulic efficiency is 86%, overall
efficiency of 83%. Determine the reading of a pressure gage (in psi) if one is installed at the
penstock just before the water inlet to the turbine.
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