Pumps

What will be theoretical approach to calculate pressure at output of propeller block if pump motor is rotating at speed N rpm? like using maths and probably integration?what will be theory?

A pump does not create pressure, only flow, which is used to calculate resulting pressure from input power and output aperture cross section.

Power delivered to the pump is
P = 2 pi N T
N = Revs/sec
T = Torque in Newtons
P = Watts

Power delivered to the fluid is the volume flow times the pressure drop
P = (m^3/second) (Pa) = (m^3/sec)(N/m^2)
Pa = P/(volume flow)

http://www.eng.utoledo.edu/polymer/info/Courses/LabIHandouts/Pump%20Characteristics.pdf

http://www.google.com/search?hl=en&client=firefox-a&rls=org.mozilla%3Aen-US%3Aofficial&channel=s&q=Using+RPM+to+calculate+pressure+at+pump+outlet&btnG=Search&aq=f&aqi=&aql=&oq=

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