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CENTRIFUGAL PUMPS VELOCITY DIAGRAM Vwz Vw2 AVW2" V2 a Ve Rī U2 U2 B,>90° B=90° B<90° (a) Forward-facing vanes (b) Radial vanes (c) Backward-facing vanes Discharge Radial Bearing Thrust Bearing Shaft Key Nozzle Centerline Mounted Support Bearing Housing Casing Shaft Sight Glass Suction Nozzile Impeller Mechanical Seal QUESTION 1: A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is 54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mm respectively. The blades occupy 12% of the impeller area and the water is assumed to enter the impeller radially. Suction and delivery pipes are equal in size. Determine: 1.1. The impeller inlet (i) diameter and inlet blade velocity. (Hint - Substitution: Vi in terms of Di and Ui in terms of D; both sub into Tan of Blade inlet angle, only unknown is then solving for D?) ANS: 300 mm; 14.42 m/s If the pump has a mechanical efficiency of 80%, calculate the blade velocity at 1.2. outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle. (Hint - Substitution: Write Vwo in terms of Uo sub in Euler equation only unknown then is solve for Vwo) ANS: Vwo = 11.54 m/s; 23.1 m/s Impeller outer diameter. 1.3. ANS: 480 mm 1.4. If the flow through velocity is consistent through the pump find the fluid velocity at outlet. ANS: Vao = 13.06 m/s What is the manometric head if the suction gauge shows -30kPa and the delivery gauge shows 210 kPa? 1.5. ANS: 24.43 m

CENTRIFUGAL PUMPS VELOCITY DIAGRAM Vwz Vw2 AVW2" V2 a Ve Rī U2 U2 B,>90° B=90° B<90° (a) Forward-facing vanes (b) Radial vanes (c) Backward-facing vanes Discharge Radial Bearing Thrust Bearing Shaft Key Nozzle Centerline Mounted Support Bearing Housing Casing Shaft Sight Glass Suction Nozzile Impeller Mechanical Seal QUESTION 1: A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is 54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mm respectively. The blades occupy 12% of the impeller area and the water is assumed to enter the impeller radially. Suction and delivery pipes are equal in size. Determine: 1.1. The impeller inlet (i) diameter and inlet blade velocity. (Hint - Substitution: Vi in terms of Di and Ui in terms of D; both sub into Tan of Blade inlet angle, only unknown is then solving for D?) ANS: 300 mm; 14.42 m/s If the pump has a mechanical efficiency of 80%, calculate the blade velocity at 1.2. outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle. (Hint - Substitution: Write Vwo in terms of Uo sub in Euler equation only unknown then is solve for Vwo) ANS: Vwo = 11.54 m/s; 23.1 m/s Impeller outer diameter. 1.3. ANS: 480 mm 1.4. If the flow through velocity is consistent through the pump find the fluid velocity at outlet. ANS: Vao = 13.06 m/s What is the manometric head if the suction gauge shows -30kPa and the delivery gauge shows 210 kPa? 1.5. ANS: 24.43 m

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
Problem 1.1MA
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02:11 1{ Vo) 20% MASTA TIPS CENTRIFUGAL PUMPS VELOCITY DIAGRAM Uz Vw2 W2 AVw2 Vr 12 Rī U1 Vwi U2 Vr Vz 124 B,>90° V2 B=90° B<90° (a) Forward-facing vanes (b) Radial vanes (c) Backward-facing vanes Discharge Nozzle Radial Bearing Thrust Shaft Key Вearing Centerline Mounted Support Bearing Housing Casing Shaft Sight Glass Suction Nozzle Impeller Mechanical Seal QUESTION 1: A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is 54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mm respectively. The blades occupy 12% of the impeller area and the water is assumed to enter the impeller radially. Suction and delivery pipes are equal in size. Determine: 1.1. The impeller inlet (i) diameter and inlet blade velocity. (Hint - Substitution: Vi in terms of Di and Uj in terms of Di both sub into Tan of Blade inlet angle, only unknown is then solving for D?) ANS: 300 mm; 14.42 m/s If the pump has a mechanical efficiency of 80%, calculate the blade velocity at 1.2. outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle. (Hint - Substitution: Write Vwo in terms of Uo sub in Euler equation only unknown then is solve for Vwo) ANS: Vwo = 11.54 m/s; 23.1 m/s 1.3. Impeller outer diameter. ANS: 480 mm 1.4. If the flow through velocity is consistent through the pump find the fluid velocity at outlet. ANS: Vao = 13.06 m/s 1.5. What is the manometric head if the suction gauge shows -30kPa and the delivery gauge shows 210 kPa? ANS: 24.43 m Jくへ
Transcribed Image Text:02:11 1{ Vo) 20% MASTA TIPS CENTRIFUGAL PUMPS VELOCITY DIAGRAM Uz Vw2 W2 AVw2 Vr 12 Rī U1 Vwi U2 Vr Vz 124 B,>90° V2 B=90° B<90° (a) Forward-facing vanes (b) Radial vanes (c) Backward-facing vanes Discharge Nozzle Radial Bearing Thrust Shaft Key Вearing Centerline Mounted Support Bearing Housing Casing Shaft Sight Glass Suction Nozzle Impeller Mechanical Seal QUESTION 1: A centrifugal pump consists out of an impeller, diffuser and casing and is powered by 300 kW (shaft power) and rotates at 96.3 rad/s. The flow rate generated by the machine is 54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mm respectively. The blades occupy 12% of the impeller area and the water is assumed to enter the impeller radially. Suction and delivery pipes are equal in size. Determine: 1.1. The impeller inlet (i) diameter and inlet blade velocity. (Hint - Substitution: Vi in terms of Di and Uj in terms of Di both sub into Tan of Blade inlet angle, only unknown is then solving for D?) ANS: 300 mm; 14.42 m/s If the pump has a mechanical efficiency of 80%, calculate the blade velocity at 1.2. outlet (Uo) and outlet whirl velocity Vwo. Assume the blade exit angle equal to the guide vane angle. (Hint - Substitution: Write Vwo in terms of Uo sub in Euler equation only unknown then is solve for Vwo) ANS: Vwo = 11.54 m/s; 23.1 m/s 1.3. Impeller outer diameter. ANS: 480 mm 1.4. If the flow through velocity is consistent through the pump find the fluid velocity at outlet. ANS: Vao = 13.06 m/s 1.5. What is the manometric head if the suction gauge shows -30kPa and the delivery gauge shows 210 kPa? ANS: 24.43 m Jくへ
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