1. An inward flow reaction turbine has a radjal blade at inlet. If the relative velocity is 3 m/s, the flow velocity will be (a) 5 m/s (b) 15 m/s (c) 25 m/s (d) 35 m/s (e).
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- 6.9 One stage of an impulse turbine consists of a converging nozzle and one ring of moving blades. The nozzle angles are 22° and the blade angles are 35°. The velocity of steam at the exit from the nozzle is 650 m/s. If the relative velocity of steam to the blades is reduced by 14% in passing through the blade ring, find the diagram efficiency and the end thrust on the shaft when the blade ring develops 1650kW.3. Describe the different parts of radial flow reaction turbine.6.9 One stage of an impulse turbine consists of a converging nozzle and one ring of moving blades. The nozzle angles are 22° and the blade angles are 35°. The velocity of steam at the exit from the nozzle is 650 m/s. If the relative velocity of steam to the blades is reduced by 14% in passing through the blade ring, find the diagram efficiency and the end thrust on the shaft when the blade ring develops 1650 kW. (79.2%, 449 N)
- 2. 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 is54.7 Kilo-litres/min. The impeller blade inlet angle and width is 23° and 180 mmrespectively. The blades occupy 12% of the impeller area and the water is assumed toenter the impeller radially. Suction and delivery pipes are equal in size. Determine:2.1. The impeller inlet (i) diameter and inlet blade velocity. (Hint - Substitution: Vfi in terms of Di and Ui in terms of Di both sub into Tan of Blade inlet angle, only unknown is then solving for Di2) 2.2 If the pump has a mechanical efficiency of 80%, calculate the blade velocity at 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 2.3 Impeller outer diameter. 2.4 If the flow through velocity is consistent…The penstock if hydro-electric plant is 0.5 x 0.5 m with velocity of 5.5 m/sec has a head of 20 m. What is the output of the turbine if the turbine efficiency is 87%? A. 845.32 kW B. 789.34 kW C. 654.56 kW D. 234.56 kWDerive the expression for specific speed of a turbine.
- Problem 3: Water is fed to an inward flow reaction turbine, running at 180 rpm with a velocity of flow of 3 m/s. The diameter and width of the wheel at inlet are I m and 135 mm, respectively. Assuming the velocity of flow to be constant and radial discharge at inlet and outlet, find, (a) work done per kN of water, (b) power developed by the turbine,For two row velocity compounded simple impulse turbine wheel derive the expressions for Diagram Power and Diagram Efficiency and also prove that : i. (P )max = 8 Cb? ii. ( na )max = Cos'ai4. to convert the kinetic energy of water into the mechanical shaft energy. Water enters the turbine, at the inlet, with the velocity Vin = 40m/s and the mass flow rate m=1,000kg/s. Water exits the Vi,z40ms turbine with a negligible velocity, say, Vout = 0 m/s.The efficiency of m - loooly/s Figure on the right shows a hydraulic turbine designed HzO HzO the turbine is 75 %. Potential energy and flow work can be ignored. 4а. Please calculate the specific kinetic energy of water entering the turbine ( ɛr or ke; in J/kg). 4b. Please calculate the rate of total kinetic energy of the water flow ( É̟ or KĖ ; in J/s or W) 4с. Please determine the mechanical power output of this turbine (Wou; in W or kW). 4d. Please determine how much mechanical energy would this turbine generate during an hour
- 1- A double jet of Pelton turbine driven by double nozzles to produce (4250 kw) to the shaft of an electrical generator when running at (400 rpm). The height of (180 m). wheel diameter is (1450 mm). The velocity of relative= 0.9 of jet velocity. If the angle of bucket is (165'), determine: a) Hydraulic efficiency b) Diameter of the jet3. A repeating stage of an axial turbine has a blade speed of 200 m/s, a constant axial velocity of 100 m/s, a stator exit angle of 65°, and no interstage swirl (i.e. the flow enters the stage axially into the stator and exits the rotor axially). Assuming that the working fluid is air, (a) Draw the velocity triangle (20 points) (b) calculate the stage loading coefficient (15 points) (c) and the degree of reaction of the machine. (10 points)Q14: Arancis turbine operates under a head of (24.5m) and consumes (10.5m³/s) of water whilst runnlag at (225 r.p.m). The velocity of flow at inlet (6.5 m/s), the inlet blade angle is (65), assume hydraulic efficiency is (90%) and no volume and mechanical losses and velocity of whirl at exit equal to zero. Calculate i) Diameter of the runner at entry, ii) Specific speed of turbine runner. Q=TD.B.VP)