Shreeya Khanal

An outward flow reaction turbine has internal and external diameters of the runner as 0.5 m and 1.0 m respectively. The guide blade angle is 15° and velocity of flow through the runner is constant and equal to 3 m/s. If the speed of the turbine is 250 r.p.m., head on turbine is 10 m and discharge at outlet is radial, determine : (i) The runner vane angles at inlet and outlet, (ii) Work done by the water on the runner per second per unit weight of water striking per second and (iii) Hydraulic efficiency.

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Outward Flow Reaction Turbine Analysis Problem Statement An outward flow reaction turbine has internal and external diameters of the runner […]

An outward flow reaction turbine has internal and external diameters of the runner as 0.5 m and 1.0 m respectively. The guide blade angle is 15° and velocity of flow through the runner is constant and equal to 3 m/s. If the speed of the turbine is 250 r.p.m., head on turbine is 10 m and discharge at outlet is radial, determine : (i) The runner vane angles at inlet and outlet, (ii) Work done by the water on the runner per second per unit weight of water striking per second and (iii) Hydraulic efficiency. Read More »

An inward flow reaction turbine has an external diameter of 1 m and its breadth at inlet is 200 mm. If the velocity of flow at inlet is 1.5 m/s, find the mass of water passing through the turbine per second. Assume 15% of the area of flow is blocked by blade thickness. If the speed of the runner is 200 r.p.m. and guide blades make an angle of 15° to the wheel tangent, draw the inlet velocity triangle and find: (i) The runner vane angle at inlet (ii) Velocity of wheel at inlet, (iii) The absolute velocity of water leaving the guide vanes, and (iv) The relative velocity of water entering the runner blade.

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Inward Flow Reaction Turbine – Inlet Velocity Triangle Problem Statement An inward flow reaction turbine has an external diameter of

An inward flow reaction turbine has an external diameter of 1 m and its breadth at inlet is 200 mm. If the velocity of flow at inlet is 1.5 m/s, find the mass of water passing through the turbine per second. Assume 15% of the area of flow is blocked by blade thickness. If the speed of the runner is 200 r.p.m. and guide blades make an angle of 15° to the wheel tangent, draw the inlet velocity triangle and find: (i) The runner vane angle at inlet (ii) Velocity of wheel at inlet, (iii) The absolute velocity of water leaving the guide vanes, and (iv) The relative velocity of water entering the runner blade. Read More »

An inward flow reaction turbine has external and internal diameters as 1.2 m and 0.6 m respectively. The velocity of flow through the runner is constant and is equal to 1.8 m/s. Determine : (i) Discharge through the runner, and (ii) Width at outlet if the width at inlet= 200 mm.

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Inward Flow Reaction Turbine Calculation Problem Statement An inward flow reaction turbine has external and internal diameters as 1.2 m

An inward flow reaction turbine has external and internal diameters as 1.2 m and 0.6 m respectively. The velocity of flow through the runner is constant and is equal to 1.8 m/s. Determine : (i) Discharge through the runner, and (ii) Width at outlet if the width at inlet= 200 mm. Read More »

Design a Pelton wheel for a head of 80 m and speed 300 r.p.m. The Pelton wheel develops 103 kW S.P. Take C_v = 0.98, speed ratio = 0.45 and overall efficiency = 0.80.

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Pelton Wheel Design Calculation Problem Statement Design a Pelton wheel for a head of 80 m and speed 300 r.p.m.

Design a Pelton wheel for a head of 80 m and speed 300 r.p.m. The Pelton wheel develops 103 kW S.P. Take C_v = 0.98, speed ratio = 0.45 and overall efficiency = 0.80. Read More »

The following data is related to the Pelton wheel : Head at the base of the nozzle = 110 m, Diameter of the jet = 7.5 cm, Discharge of the nozzle = 200 litres/s, Shaft power = 191.295 kW, Power absorbed in mechanical resistance = 3.675 kW. Determine : (i) Power lost in nozzle and, (ii) Power lost due to hydraulic resistance in the runner.

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Pelton Wheel Power Loss Analysis Problem Statement The following data is related to the Pelton wheel : Head at the

The following data is related to the Pelton wheel : Head at the base of the nozzle = 110 m, Diameter of the jet = 7.5 cm, Discharge of the nozzle = 200 litres/s, Shaft power = 191.295 kW, Power absorbed in mechanical resistance = 3.675 kW. Determine : (i) Power lost in nozzle and, (ii) Power lost due to hydraulic resistance in the runner. Read More »

Two jets strike at buckets of a Pelton wheel, which is having shaft power as 14,715 kW. The diameter of each jet is given as 150 mm. If the net head on the turbine is 500 m, find the overall efficiency of the turbine. Take C_v = 1.0.

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Two-Jet Pelton Wheel Efficiency Calculation Problem Statement Two jets strike at buckets of a Pelton wheel, which is having shaft

Two jets strike at buckets of a Pelton wheel, which is having shaft power as 14,715 kW. The diameter of each jet is given as 150 mm. If the net head on the turbine is 500 m, find the overall efficiency of the turbine. Take C_v = 1.0. Read More »

A Pelton wheel is having a mean bucket diameter of 0.8 m and is running at 1000 r.p.m. The net head on the Pelton wheel is 400 m. If the side clearance angle is 15° and discharge through nozzle is 150 litres/s, find : (i) Power available at the nozzle, and (ii) Hydraulic efficiency of the turbine.

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Pelton Wheel Efficiency Calculation Problem Statement A Pelton wheel is having a mean bucket diameter of 0.8 m and is

A Pelton wheel is having a mean bucket diameter of 0.8 m and is running at 1000 r.p.m. The net head on the Pelton wheel is 400 m. If the side clearance angle is 15° and discharge through nozzle is 150 litres/s, find : (i) Power available at the nozzle, and (ii) Hydraulic efficiency of the turbine. Read More »

A Pelton wheel is to be designed for the following specifications. Shaft Power= 735.75 kW, Head= 200 m, Speed= 800 r.p.m., Overall efficiency = 0.86 and jet diameter is not to exceed one-tenth the wheel diameter. Determine : (i) Wheel diameter, (ii) The number of jets required, and (iii) Diameter of the jet. Take C_v = 0.98 and speed ratio = 0.45.

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Pelton Wheel Design Calculation Problem Statement A Pelton wheel is to be designed for the following specifications. Shaft Power= 735.75

A Pelton wheel is to be designed for the following specifications. Shaft Power= 735.75 kW, Head= 200 m, Speed= 800 r.p.m., Overall efficiency = 0.86 and jet diameter is not to exceed one-tenth the wheel diameter. Determine : (i) Wheel diameter, (ii) The number of jets required, and (iii) Diameter of the jet. Take C_v = 0.98 and speed ratio = 0.45. Read More »

A Pelton wheel has a mean bucket speed of 35 m/s with a jet of water flowing at the rate of 1 m³/s under a head of 270 m. The buckets deflect the jet through an angle of 170°. Calculate the power delivered to the runner and the hydraulic efficiency of the turbine. Assume co-efficient of velocity as 0.98.

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Pelton Wheel Turbine Calculation Problem Statement A Pelton wheel has a mean bucket speed of 35 m/s with a jet

A Pelton wheel has a mean bucket speed of 35 m/s with a jet of water flowing at the rate of 1 m³/s under a head of 270 m. The buckets deflect the jet through an angle of 170°. Calculate the power delivered to the runner and the hydraulic efficiency of the turbine. Assume co-efficient of velocity as 0.98. Read More »

In a hydraulic coupling, the speeds of the driving and driven shafts are 800 r.p.m. and 780 r.p.m. respectively. Find: (a) the efficiency of the hydraulic coupling, and (b) the slip of the coupling.

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Hydraulic Coupling Efficiency Calculation Problem Statement In a hydraulic coupling, the speeds of the driving and driven shafts are 800

In a hydraulic coupling, the speeds of the driving and driven shafts are 800 r.p.m. and 780 r.p.m. respectively. Find: (a) the efficiency of the hydraulic coupling, and (b) the slip of the coupling. Read More »

Find the efficiency of a hydraulic crane, which is supplied 400 litres of water under a pressure of 490.5 N/cm² for lifting a weight of 98.1 kN through a height of 10 m.

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Hydraulic Crane Efficiency Calculation Problem Statement Find the efficiency of a hydraulic crane, which is supplied 400 litres of water

Find the efficiency of a hydraulic crane, which is supplied 400 litres of water under a pressure of 490.5 N/cm² for lifting a weight of 98.1 kN through a height of 10 m. Read More »

A hydraulic lift is required to lift a load of 98.1 kN through a height of 12 m, once in every 100 seconds. The speed of the lift is 600 mm/s. Determine : (a) power required to drive the lift, (b) working period of lift in seconds, and (c) idle period of the lift in seconds.

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Hydraulic Lift Cycle Analysis Problem Statement A hydraulic lift is required to lift a load of 98.1 kN through a

A hydraulic lift is required to lift a load of 98.1 kN through a height of 12 m, once in every 100 seconds. The speed of the lift is 600 mm/s. Determine : (a) power required to drive the lift, (b) working period of lift in seconds, and (c) idle period of the lift in seconds. Read More »

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