An impulsive stage of a steam turbine is supplied with dry and saturated steam at 14.8 bar. The stage has a single row of moving blades running at 3500 rev/min. The mean diameter of the blade disc is 0.91 m. The nozzle angle is 16° and the axial component of the absolute velocity leaving the nozzle is 93.5 m/s. The height of the nozzles at their exit is 100 mm. The nozzle efficiency is 0.85 and the blade velocity co-efficiency is 0.966. The exit angle of the moving blades is 3° greater than at the inlet. Determine: (1) The blade inlet and outlet angles. (2) The isentropic heat drop in the stage. (3) The stage efficiency. (4) The power developed by the stage....solve with me 40 minutes

4. For Francis turbine with the following specifications: Paev= 225 MW, H=250 m, nov= 90 % , If the velocity of water at spiral case entering =24 m/s, and the volumetric efficiency is 0.98, thus the diameter of the spiral case entering is: a. 2.3 m. b. 2.8 m. c. 3.1 m. d. 3.6 m. e. None of them.

EHide blocks This course An axial flow Impulse gas turbine stage receives a mass flow rate of 76 lbm/s at a velocity V1. It has a hub and tip radii of 7 in and 12 in respectively. The gas leaves the stator with an angle of a;=45° with the tangential direction. The blade angle at the outlet is Bp2=36.07°. Take pgas=0.085 lbm/ft. a1 V1 Um Bb2 Stator Rotor 2 Ping 6232 ms 08 5 KB Determine the absolute velocity at the inlet in ft/s. Choose... Determine the blade angle at the inlet Bp1 Choose... 741

Two ideal Brayton cycles (see Figure below) have the same inlet temperature and the same maximum temperature of the turbine inlet. Brayton Cycle A has a higher compression ratio than Cycle B. Which of the following statements is true about the cycles? Cycle A has a higher thermal efficiency and Cycle B has a higher work net for a given mass flow rate.   Cycle B has a higher thermal efficiency and a higher work net for a given mass flow rate.   Since the temperatures are the same the efficiencies and work net are also the same.   Cycle A has a higher work net for a given mass flow rate and Cycle B has a higher thermal efficiency.   Cycle A has a higher thermal efficiency and a higher work net for a given mass flow rate.

Consider an engine with a maximum speed of 7000 rpm. The bore and stroke are 0.1 m, each. For an inlet air temperature of 330 K, determine the intake valve area (assume single valve per cylinder and take k=1.4). O 7.6 cm? O 11.3 cm2 O 4.6 cm2 O 8.3 cm2 O 9.5 cm?

Solve it correctly please. I will rate accordingly with 3votes.

Q - The rotor of an impulse turbine is 60 cm diameter and runs at 9,600 r.p.m. The nozzles are at 20° to the plane of the wheel, and the steam leaves them at 600 m/sec. The blades outlet angle are 30° and the friction factor is 0.8. Calculate the power developed per kg of steam per second and the diagram efficiency.

10. The initial design of an IFR turbine is to be based upon Whitfield’s procedure for optimum efficiency. The turbine is to be supplied with 2.2 kg/s of air, a stagnation pressure of 250 kPa, a stagnation temperature of 800°C, and have an output power of 450 kW. At turbine exit the static pressure is 105 kPA. Assuming for air that γ ¼ 1.33 and R ¼ 287 J/kg K, determine the valueof Whitfield’s power ratio, S, and the total-to-static efficiency of the turbine.

Steam at 1 kg / s mass flow enters a steam isentropic turbine at a pressure of 4 MPa, a temperature of 300ºC and a speed of 50 m / s, and leaves it at a pressure of 150 kPa and a speed of 200 m / s. .Note: T0 = 25 ºC, P0 = 100 kPa, T (K) = 273 + ºC a) Find the power produced by the turbine.b) Find the reversible power produced by the turbine.c) Find the isentropic efficiency of the turbinec) Find the second law efficiency of the turbine.