2 m IM A turbomachine has inner impeller diameter of 1000 g with a uniform width of flow cross-section being 120 mm. Water enters radially at the 00g and outer diameter 2000 mm, inner impeller and exit at the outer impeller which has a blade angle of 62°. The flow rate through the machine is 4 m³/s while the rotation speed is 350 rpm. Take water density as 1000 kg/m³ and assume ideal flow conditions with no losses, and the absolute velocity of the inlet water is directed radially (a) (b) (c) (d) (e) Draw the velocity diagrammes at the inlet and outlet of an impeller, labelling the velocity components. What is the blade speed at the inlet? What is the absolute speed of the water at the inlet? What is the blade angle at the inlet? Find the absolute velocity of water at the outlet. Justify whether the machine is a pump or turbine by calculating the torques, acting on the blade.
2 m IM A turbomachine has inner impeller diameter of 1000 g with a uniform width of flow cross-section being 120 mm. Water enters radially at the 00g and outer diameter 2000 mm, inner impeller and exit at the outer impeller which has a blade angle of 62°. The flow rate through the machine is 4 m³/s while the rotation speed is 350 rpm. Take water density as 1000 kg/m³ and assume ideal flow conditions with no losses, and the absolute velocity of the inlet water is directed radially (a) (b) (c) (d) (e) Draw the velocity diagrammes at the inlet and outlet of an impeller, labelling the velocity components. What is the blade speed at the inlet? What is the absolute speed of the water at the inlet? What is the blade angle at the inlet? Find the absolute velocity of water at the outlet. Justify whether the machine is a pump or turbine by calculating the torques, acting on the blade.
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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Transcribed Image Text:IM
2m
A turbomachine has inner impeller diameter of 1000 g and outer diameter 2000 mm,
with a uniform width of flow cross-section being 120 mm. Water enters radially at the
inner impeller and exit at the outer impeller which has a blade angle of 62°. The flow
rate through the machine is 4 m³/s while the rotation speed is 350 rpm. Take water
density as 1000 kg/m³ and assume ideal flow conditions with no losses, and the
absolute velocity of the inlet water is directed radially!
(a)
(b)
(c)
(d)
(e)
(f)
Draw the velocity diagrammes at the inlet and outlet of an impeller, labelling the
velocity components.
What is the blade speed at the inlet?
What is the absolute speed of the water at the inlet?
What is the blade angle at the inlet?
Find the absolute velocity of water at the outlet.
Justify whether the machine is a pump or turbine by calculating the torques,
acting on the blade.
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