The following data is given for a Francis turbine with an axial discharge Overall efficiency Hydraulic...
3) (35 points) A Francis turbine operates at its maximum efficiency point at nH-0.94, corresponding to a power specific speed (eq.9.1) of 0.9 rad. The effective head, HE, across the turbine is 160 m and the speed required for electrical generation is 750 rpm. The runner tip speed is 0.7 times the spouting velocity, co 2gHg, the absolute flow angle at runner entry is 72° from the radial direction, and the absolute flow at runner exit is without swirl. Determine:...
please solve 5(b) and 6 (a and b) fluid machinery b)An inward flow reaction turbine works under a head of 100m. The inlet and outlet diameters of the runner are 1.2 m and 0.6 m, respectively. The width of the runner is 150 mm, which is constant throughout. The velocity of flow at the outlet is 6 m/s. The blade angle at the outlet is 15. The hydraulic efficiency is 0.9. Calculate the following: ) The speed of the Turbine...
(a) Distinguish, with the aid of simple sketches where appropriate, between the construction, operation and applications of the Pelton wheel, Francis turbine and Kaplan turbine. b) In a Francis turbine, the supply head (H) is 20 m of water (density 1000 kg m3. The discharge rate to atmosphere is 600 kg s-1. The external radius of the runner (R) is 0.43 m and the internal radius (R2) is 0.20 m. The runner blades are radial at inlet and they rotate...
)An axial-flow turbine operating with an overall stagnation pressure of 8to 1 has a polytropic efficiency of 0.85. Determine the total-to-total efficiency of the turbine.b)If the exhaust Mach number of the turbine is 0.3, determine the total-to-static efficiency.c)If, in addition, the exhaust velocity of the turbine is 160 m/s, determine the inlet total temperature.Assume for the gas that Cp=1.175 kJ/(kg K) and R=287 kJ/(kg K).
Steam enters a rotor of an axial turbine with an absolute velocity V1 320 m/s at an angle = 73°. The axial velocity remains constant. The blade speed is U 165 m/s. The rotor blades are equiangular so that. Draw the velocity triangles. Find 1) the runner velocity (take runner diameter to be 1.12 m) 2) Inlet axial absolute velocity 3) Inlet tangential absolute velocity ative velocity 5) the relative flow angle 2814 rpm b. 2019 rpm c. 1970 rpm...
2. (30 pts) A hydraulic turbine operates at a steady state as shown in the figure. It exits to the atmosphere through a discharge section of 1 m in diameter at an average velocity of 6 m/s. The surface of the water is 50 m above the turbine. What is the maximum shaft work head, hs, that can be extracted? What is the maximum amount of power the turbine can produce, in MW? 50 m o 1 m 6 m/s
In an impulse turbine of the Pelton type, the jet is turned by the bucket by 165°. The head available at the nozzle is 750 m and blade speed ratio is 0.46. Cv = 0.98. Relative velocity is reduced by 12% due to friction. Determine the hydraulic efficiency. If the flow available is 20 m3/s. What is the power potential. Assuming 5 units of equal power, determine the jet diameter and wheel diameter if d/D = 12.
Q2 Figure 2.1 shows the velocity diagram for an axial turbine stage. The turbine rotor blade speed is 80 m's. Exhaust gas flow through the turbine stage with a constant axial velocity (2) at 90 m/s. List of relative and absolute flow angles at the rotor inlet and outlet are given in APPENDIX D for each student, respectively. At rotor inlet At rotor outlet B3 Cx2 = 90 m/s B2 Cx3 = 90 m/s W2 0.3 Cys 44 U =...
6. Determine the setting of a centrifugal pump, given that flow rate = 2.4 m/min; diameter of intake pipe = 160 mm; entrance losses = one velocity head in suction pipe; required NPSH = 42 kPa; water temperature = 30°C N D1, D2 : inlet and outlet diameters of impeller (rotor) b : impeller width 0,6 : inlet and outlet impeller vane angles (degrees) : speed of rotation of impeller (and its driver) in rpm V, V :tangential and radial...
theavton the ump.if the absolute pressure of the liquid drops below the vapor pressure then cavitation will occur Answer B) False A) True A centrifugal pump delivers water against a net head of 20 meters and a design speed of 1100 rpm. is 10 m/s. he impeller diameter is 0.4 m. Determine manometric efficiency of the pump, if Co2 Intr E) 95% D) 92% A) 85% C) 90% B) 88% Answer In Calculate net head or effective head for Pelton...