Conditions at the inlet to the nozzle of a Pelton wheel are p = 700 psig and V = 15 mph. The jet diameter is d = 7.5 in: and the nozzle loss coefficient is Knozle = 0.04. The wheel diameter is D = 8 ft. At this operating condition, η = 0.86. Calculate (a) the power output, (b) the normal operating speed, (c) the approximate runaway speed, (d) the torque at normal operating speed, and (e) the approximate torque at zero speed.
Want to see the full answer?
Check out a sample textbook solutionChapter 10 Solutions
Fox And Mcdonald's Introduction To Fluid Mechanics
Additional Engineering Textbook Solutions
Applied Fluid Mechanics (7th Edition)
Thinking Like an Engineer: An Active Learning Approach (3rd Edition)
Statics and Mechanics of Materials (5th Edition)
Mechanics of Materials
Engineering Mechanics: Dynamics (14th Edition)
Thinking Like an Engineer: An Active Learning Approach (4th Edition)
- A single stage centrifugal pump has an impeller of 250 mm diameter which rotates at 1,800 rpm and lifts 60 lit/sec to 25 m with an efficiency of 70%. Obtain the number of stages and diameter of each impeller of a similar multi-stage pump to lift 75 lit/sec to 175 m at 1,500 rpm. (8 stages ; 280 mm dia)arrow_forward2.5-L bench scale bioreactor is used for the production of recombinant P64K protein from Neisseria meningitides. The dimensions for the bioreactor are Dt 12.9 cm, ratio Di/Dt = 1/3 and N = 700 rpm. With the scale up factor of 2.24, determine the impeller tip speed (m/s) for the pilot scale bioreactor based on constant impeller tip speed and constant power consumption per volume. Predict which scale up method might give a higher concentration of P64K, if the demand of dissolved oxygen plays an important role.arrow_forwardQ3. Calculate the air standard efficiency and work of a Diesel cycle, has a clearance volume of 0.00025 m³ and a bore and stroke of 152.5 mm and 200 mm, respectively. If the pressure and temperature at the beginning of the compression are 100 kN/m² and 20 °C, respectively. The temperature after combustion is 1090 °C. Take y = 1.4 and Cp= 1.005 kJ/kg K. Q4. Fluid ente Ku/kuarrow_forward
- 3. Assume the turbine as an incompressible flow machine. The average meridional speed is given as 150m/s. The flow coefficient is 0.5. Determine the blade speed that satisfies the above conditions.4. In a two-dimensional compressor cascade, inlet stagnation air pressure is 1.5 bar and inlet stagnation temperature is 330K. For an inlet Mach number of 0.75 and an inlet flow angle of 500, the exit flow angle is measured as 15.80. Determine the mass flow rate per unit frontal area, the exit Mach number and the static pressure ratio across the cascade. Assume the flow is isentropic.arrow_forwardThe outer diameter of a Francis runner is 1.4 m. The flow velocity at inlet is 9.5 m/s. The absolute velocity at the exit is 7 m/s. The speed of operation is 430 rpm. The power developed is 12.25 MW, with a flow rate of 12 m3/s. Total head is 115 m. For shockless entry determine the angle of the inlet guide vane. Also find the absolute velocity at entrance, the runner blade angle at inlet and the loss of head in the unit. Assume zero whirl at exit. Also fluid the specific speed.arrow_forwardThe cylinder bore diameter of a double-acting reciprocating pump is 160 mm and its stroke is 340 mm. The pump runs at 53 rpm and lifts water through a height of 29 m. The delivery pipe is 22 m long and 100 mm in diameter. Find (i) the theoretical discharge in liters/s,(ii) the theoretical power required to run the pump in kW, (iii) the percentage of slip, and (iv) the coefficient of discharge., if the actual discharge is 10 liters/s. Assume the weight density of water is 9810 N/m3arrow_forward
- The cylinder bore diameter of a single-acting reciprocating pump is 150 mm and its stroke is 310 mm. The pump runs at 56 rpm and lifts water through a height of 28 m. The delivery pipe is 23 m long and 102 mm in diameter. Find (i) the theoretical discharge in liters/s,(ii) the theoretical power required to run the pump in kW, (iii) the percentage of slip, and (iv) the coefficient of discharge., if the actual discharge is 4.3 liters/s. Assume the weight density of water is 9810 N/m3arrow_forwardA single-stage, single acting compressor has a bore of 200 mm and a stroke of 300 mm. It runs at a speed of 500 rpm. It has a clearance of 5% and a polytrophic index of 1.3. • Intake conditions are 97 kN/m² at 20°C • Delivery pressure is 550 kN/m² FAD (free air delivery) conditions 101.325 kN/m² at 15°C 5.1. Draw P-V diagram 5.2. Swept volume (0.009425 m³) 5.3.Clearance volume (0.000471 m³) 5.4. Effective swept volume (0.008106 m³) 5.5. Free air delivery (FAD) (4.053 m³) 5.6. Volumetric efficiency (80.9%) 5.7. Delivery temperature (437.5 K) 5.8. Cycle power (14 kW) 5.9. Isothermal efficiency (Neglecting Clearance) (81.3 %)arrow_forwardVerify that S defined by (6.19) is dimensionless. What are the advantages of presenting performance data for turbines in dimensionless form?arrow_forward
- A pelton wheel working under a head of 50 meters, develops 80 kW at 230 rpm. Calculate the diameter of jet if overall efficiency is 78%. (Assume C v =0.98)arrow_forward[1] A Pelton turbine is driven by two jets, generating 5.0 MW at 80 rev/min. The effective head at the nozzles is 300 m of water and the nozzle velocity coefficient, KN = 0.97. The axes of the jets are tangent to a circle 2 m in diameter. The relative velocity of the flow across the buckets is decreased by 17% and the water is deflected through an angle of 165 deg. Neglecting bearing and windage losses, determine: (i) the runner efficiency; (ii) the diameter of each jet; (iii) the power specific speed.arrow_forward(e) Calculate the rotor size, blade height, power and speed rating of the wind turbine. Aspect ratio = h/R = 2, capacity factor= 0.3, tip speed ratio= 7. rotor to generator mechanical losses 10%, generator losses 10%.arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY