Question 7 An axial flow water Kaplan turbine operates under a head of 2.5 m while...

Question 7

An axial flow water Kaplan turbine operates under a head of 2.5 m while the rotational speed is 75 rpm. The runner tip diameter is 4.8 m and the hub diameter is 2.4 m. The flow rate is 48.5 m3/s and hydraulic efficiency of 93%. Assuming zero whirl at exit, determine: Sketch the inlet and outlet velocity triangles at the MEAN radius and calculate:

1.1 The runner blade inlet and exit angles at mean radius. ANS: +/- 74˚

1.2. The theoretical power developed? ANS: +/- 1.1MW

1.3. The mechanical efficiency if the shaft output power is 980 kW? ANS: +/- 88.6%

This is only one question, sir. Pls solve it in a comprehensive manner showing all the steps in detail. Thank you!!

Solutions

Expert Solution

samet mamat answered 1 month ago

Next > < Previous

Related Solutions

A vertical shaft Kaplan turbine operating under a head of 9.8 m has a runner diameter...

A vertical shaft Kaplan turbine operating under a head of 9.8 m has a runner diameter of 9.3 m. At the maximum optimum point, the turbine runs at 51.7 rpm and develops 45,000 kW power discharging 535 m 3 /s water. Determine the values of unit speed, unit discharge, unit power and specific speed of the turbine. If the critical value of cavitation coefficient for the runner is 0.95, determine the location of the runner with respect to the tail...

Q2 A single stage nozzled axial flow gas turbine operates with 1000 K total inlet temperature...

Q2 A single stage nozzled axial flow gas turbine operates with 1000 K total inlet temperature and 4.8 bar inlet total pressure with 12 kg/s mass flow rate. The axial velocity throughout the stage is constant at 220 m/s and the blade speed is 350 m/s. The nozzle exit and the rotor exit angles are 65° and 7° respectively. The static pressure at the exit of the stage is 2.5 bar. Assuming equal inlet and exit absolute flow velocities, determine:...

1. The turbine of a hydrostatic plant is driven by a falling head of water from...

1. The turbine of a hydrostatic plant is driven by a falling head of water from a falling head of water from a source 30 m high up through a 600 mm penstock flowing full. A. Evaluate the theoretical velocity of water as it hits the turbine blades in m/sec. B. Evaluate the theoretical discharge of water in m3/s. C.If the turbine is only 70% efficient, estimate the horsepower available from it.. 2. Reservoir A supplies water to a nozzle...

The quantity of water available for a hydroelectric station is 273 m3/s under a head of 18 m.

The quantity of water available for a hydroelectric station is 273 m3/s under a head of 18 m. Assuming the speed of the turbines to be 150 rpm and the efficiency 82%. determine the least number of identical machines that be needed if (i) Francis turbines whose Ns must not exceed 395, (ii) Kaplan turbines whose Ns must not exceed 690 are chosen, What would be the individual power output of the unit in the cases [ i. Francis P...

An axial flow fan has a hub diameter of 1.50 m and a tip diameter of...

An axial flow fan has a hub diameter of 1.50 m and a tip diameter of 2.0 m. It rotates at 18 rad/s and when handling 5.0?^(3)s^(-1) of air, develops a theoretical head equivalent to 17mm of water. Determine the blade outlet and inlet angles at the hub and the tip. Assume that the velocity of flow is independent of radius and that the energy transfer per unit length of blade is constant. Assume density of air is1.2 kg/m^3

An axial flow fan 1.83 m diameter is designed to run at a speed of 1400 rev/min with an average axial air velocity of 12.2 m/s

An axial flow fan 1.83 m diameter is designed to run at a speed of 1400 rev/min with an average axial air velocity of 12.2 m/s. A quarter scale model has been built to obtain a check on the design and the rotational speed of the model fan is 4200 rev/min. Determine the axial air velocity of the model so that dynamical similarity with the full-scale fan is preserved. The effects of Reynolds number change may be neglected. A sufficiently large...

An industrial gas turbine operates at an 8.8:1 pressure ratio and a mass flow of 77...

An industrial gas turbine operates at an 8.8:1 pressure ratio and a mass flow of 77 kg/s. The exhaust temperature is at 437?C and the inlet temperature to the machine is around 1000?C. The machine is to be designed for a constant axial velocity of 200 m/s. (This data is based on the Rolls-Royce Avon, an engine that dates from the 1950s but is still used as low efficiency high reliability engine for stationary power such as pipeline pumping.) For...

An industrial gas turbine operates at an 8.8:1 pressure ratio and a mass flow of 77...

Consider an axisymmetric pipe flow simulation. The pipe is 40 m long in axial direction and...

Consider an axisymmetric pipe flow simulation. The pipe is 40 m long in axial direction and its radius is 0.2 m. The structured mesh is used in the computational domain and it is uniformly spaced by 1000 cells in axial direction and 20 cells in radial direction. The simulation is conducted in transient and the time step size was set to 0.001 second. After running the simulation for a long time, the flow has reached a fully developed condition. The...

A reheat Rankine cycle operates with water as the working fluid. Steam enters the first turbine...

A reheat Rankine cycle operates with water as the working fluid. Steam enters the first turbine at 8 MPa and 450◦C and exits at 0.8 MPa. It is then reheated at 400◦C before entering the second turbine, where it exits at 10 kPa. If the amount of work into the pump is 8.04 kJ/kg and the net work per cycle produced is 1410.5 kJ/kg, determine the thermal efficiency. Assume no pressure losses in the condenser or the boiler.

Subjects