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Fluid Mechanics LAB: Dynamic Pumps and Cavitation

Fluid Mechanics LAB: Dynamic Pumps and Cavitation. ENTC - 303. Dynamic Pumps. Kinetic or dynamic pumps add energy to the fluid by accelerating it through the action of a rotating impeller. Kinetic or dynamic Pumps. Radial Flow (Centrifugal). Axial flow (propeller). Mixed flow.

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Fluid Mechanics LAB: Dynamic Pumps and Cavitation

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  1. Fluid Mechanics LAB:Dynamic Pumps and Cavitation ENTC - 303 PROF. ALVARADO

  2. Dynamic Pumps Kinetic or dynamic pumps add energy to the fluid by accelerating it through the action of a rotating impeller. PROF. ALVARADO

  3. Kinetic or dynamic Pumps Radial Flow (Centrifugal) Axial flow (propeller) Mixed flow Classification of dynamic pumps PROF. ALVARADO

  4. Performance of Centrifugal Pumps PROF. ALVARADO

  5. System and Pump Operating Point The operating point of the system is changed by flow control valve

  6. Cavitation Cavitation is the formation of vapor cavities due to the decrease of the suction pressure to a value below the vapor pressure. If below vapor pressure, cavitation occurs PROF. ALVARADO

  7. Net Positive Suction Head PROF. ALVARADO

  8. Pump efficiency • The overall pump efficiency is a product of the volumetric efficiency and the mechanical efficiency PROF. ALVARADO

  9. Pump efficiency (P is in Pa; QA and QT are in m3/s; T is in N-m; N is in Rev Per Second (RPS))

  10. Pump efficiency Overall Efficiency = Vol.Efficiency x Mech.Efficiency Actual Power Out = P x QA Actual Power In = Electrical Power Input (Watts) PROF. ALVARADO

  11. PROF. ALVARADO

  12. PROF. ALVARADO

  13. References • Applied Fluid Mechanics, Robert L. Mott • www.gewater.com • www.pumpworld.com PROF. ALVARADO

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