Water depths in intake structures that are high, increased vortex occurrences. The study showed
decay response function of pumps affect vortex occurrences. Relationship between response function
and time duration of air-entraining vortex occurrence was established. Relationship showed an
increased head loss if air-entraining vortex duration increased. Representation showed pump
response function will peak and fall at specific change in flow rates.
B. C. Okoro
Department of Civil Engineering, Federal University of Technology, P.M.B. 1526, Owerri, Imo State, Nigeria.
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