Problem (5.3) The outlet angles of the nozzle and blades of a two-row impulse turbine are in succession 16°, 18°, 20° and 30° and the corresponding nozzle and blade velocity coefficients are 0.92, 0.72, 0.78 and 0.84. The flow through the nozzle is at the rate of 4 kg/s, and the supply is at 1.2 MPa and 50°C superheat. The chamber pressure is 0.5 MPa and the blade speed is 1/5 that of the jet speed leaving the nozzle. Determine the work done and the blade efficiency.

Problem (5.3) The outlet angles of the nozzle and blades of a two-row impulse turbine are in succession 16°, 18°, 20° and 30° and the corresponding nozzle and blade velocity coefficients are 0.92, 0.72, 0.78 and 0.84. The flow through the nozzle is at the rate of 4 kg/s, and the supply is at 1.2 MPa and 50°C superheat. The chamber pressure is 0.5 MPa and the blade speed is 1/5 that of the jet speed leaving the nozzle. Determine the work done and the blade efficiency.

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

See similar textbooks

Similar questions

Problem (5.3) The outlet angles of the nozzle and blades of a two-row impulse turbine are in succession 16°, 18°, 20° and 30° and the corresponding nozzle and blade velocity coefficients are 0.92, 0.72, 0.78 and 0.84. The flow through the nozzle is at the rate of 4 kg/s, and the supply is at 1.2 MPa and 50°C superheat. The chamber pressure is 0.5 MPa and the blade speed is 1/5 that of the jet speed leaving the nozzle. Determine the work done and the blade efficiency. Ans. [391.67 kW, 61.13 %]
The steam from the nozzles of a single wheel impulse turbine is 600m/s and at 20degree to the plane of the wheel. The blade wheel rotates at 3000rev/min and the mean blade radius is 590mm. The axial velocity of the steam at exit from the blade is 164m/s and the blades are symmetrical. Calculate 1: The blade angles; 2: The diagram work per unit mass flow rate steam. 3: The diagram efficiency. 4: The blade velocity coefficient.
A single-stage reciprocating air compressor has two double acting cylinders each 46 cm diameter and 36 cm stroke and the piston rods are 50 mm diameter. The intake and discharge pressures are 101.325 kPa and 445 kPa, respectively, and the speed is 257 RPM. If the volumetric efficiency is 78%, the isothermal efficiency is 66%, mechanical efficiency is 94%, Actual Indicated Power, in kW is close to: 225.87 90.24 180.48 120.21 110.21
I am trying to find the mass flow rate that is extracted from the turbine I am getting nubers near 2.9 for a result. how do I solve this.
A steam turbine developed 2372.2 hp when its inlet condition is 1300 BTU/lb enthalphy and 400 ft/s velocity and steam flow of 200 lb/min. The exit enthalphy is 800 BTU/min. Find the exit velocity. (a) 52 fps, (b) 50 fps, (c) 54 fps, (d) 56 fps
A rection turbine has guide vane angle 30° the runner blades make an angle of 80° relative to the tanget at inlet .the blades width at inlet is 1/4 of the outer diameter .the water does not have any tanget velocity at outlet.the head is 25 m and the rotational speed of the runner is 16.67 rotation per second (rps) the turbine efficiency is 88% determine the runner diameter at the inlet and the power developed by this turbine
A single stage single acting reciprocating air compressor has 0.25 m x 1.75 m runs in 750 rpm is to deliver 0.20m³ free air per second from 101.3 kPa to 355 kPa. Calculate (a) the volume displacement (b) the volumetric efficiency (c) the isothermal work done, compression is at pV =c (d) the isothermal compressor efficiency if the the indicated power of compressor is 40kW
In a stage of Parson's reaction turbine, the mean diameter of the wheel is 1.05 m and the speed is 3000 r.p.m. The angles of receiving tips are 35° and the discharging tips is 20°. If the steam flow rate is 1 kg/min, draw the velocity diagram for blades and evaluate, (a) Tangential thrust on blades (b) Axial thrust on blades (c) Power developed in the blades and (d) Diagram efficiency.
4. It is proposed to pump 10,000 kg/h of toluene at 114°C and 1.1 atm abs pressure from the reboiler of a distillation tower to a second distillation unit without cooling the toluene before it enters the pump. If the friction loss in the line between the reboiler and pump is 7 kN/m? and the density of toluene is 866 kg/m³, how far above the pump must the liquid level in the reboiler be maintained to give a net positive suction head of 2.5m?
Ata particular stage of a reaction turbine the mean blade speed is 140 nı/sec and the steam is at a pressure of 20 bar with temperature of 250° C. Fixed and moving blades at this stage haye inlet angles 30° and exit angles 20°. The stage efficiency is 80%. Determine (i) Specific entholpy drop across the stage in kJ/kg. (ti) Drum Dia and blade height if heigh is one-twelfth of the drum dia. and the steam flow is 120 kg/sec.
A Pelton wheel is designed for producing a mechanical output of12,000 kW while working under a head of 400 m and running at 750rpm. If three jets are used for running the wheel then determine theoverall efficiency of the wheel. The jet diameter is one-fifth of thewheel diameter and the speed ratio is 0.48. Assume a proper value forthe coefficient of the nozzle.
Albert bought a portable device to pump his truck tyres. On the manual, he found outthat the device is a single stage, single-acting air compressor. Air delivery for thisdevice is 30 bar at a speed of 1500 rev/min. The atmospheric condition of his locationis 87 kPa and 20 ˚C, with a FAD of 0.22 m2/min. The clearance volume is 4% of theswept volume and the stoke/bore ratio is 1.3/1.Take “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K 1. What is the delivery isothermal efficiency of the compressor percentages to 2 decimal places? 2. What is the delivery volume in terms of stroke volume, provide the coefficient values of the swept volume to 4 decimal places? 3. What is the induced volume per stroke in m3 to 6 decimal places?