Fluid mechanics &_hydraulic_machines[1]
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The document discusses priming, cavitation, operating characteristics, advantages and disadvantages of submersible pumps. It provides information on how to select a submersible pump based on criteria like discharge, head, speed and specific speed. The type of impeller - shrouded, unshrouded or mixed flow - is also an important aspect of pump selection depending on the application like pumping water, slurry or other fluids. Axial and radial flow pumps are suited for different head requirements.
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Fluid mechanics &_hydraulic_machines[1]
- 1. U.P.U GOVT. POLY. COLLEGE DURG GUIDED BY:- MR.GAJENDRA DEWANGAN SUBMIT BY:- 1. SATYAM SONI 2. SHUBHAMGOSWAMI 3. TEJPRAKASH VERMA
- 2. FLUID MECHANICS & HYDRAULIC MACHINES 1. PRIMING. 2. CAVITATIONS. 3. OPERATING CHARACTERISTICS OF PUMPS. 4. ADVANTAGES AND DISADVANTAGES OF SUBMERSIBLE PUMP 5. SELECTION OF SUBMERSIBLE PUMP.
- 3. PRIMING
- 4. CAVITATION
- 6. HOW TO PREVENT CAVITATION DUE TO VAPORIZATION
- 10. APPLICATION
- 12. SELECTION OF PUMP 1. The main criteria of the selection of the type of the pump are value of discharge(Q),head(H)and spped(N),From these values the specifie speed of the pump is calculated and subsequently the type of the pump can be decided. 2.When the specific speed is low and it is possible to increase the pump speed, it is better to use multi-stage pump; the number of stages are decided on the basis the head and the type of the pump to be used. 3.The type of impeller is another aspect of pump selection: (1)impeller shrounded type …….. For pumping fresh clean water (2)impeller-un shrounded or propeller type………. For pumping soild-liquid mixture of the plastic material (For pumping molasses etc. sometimes positive displacement screw pump or tobe pump a employed.) (3)mixed flow impellers with diffuser vanes …...... Used for deep well or submersible pump Axial flow pumps are employed for very low headsof about six meters and for by discharges Radial flow pumps are used when the head is high.