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Fakulteta za strojništvo, Ljubljana (FSLJ)
  • Noise as indicator of instability in centrifugal pumps
    Čudina, Mirko
    ǂThe ǂonset of the stall, surge and cavitation in a centrifugal pump cause instability of a pumping system and different noise level. At the design point of operation (Qdes) and without cavitation, ... the "rotational" noise due to the blade passing frequency is the predominant noise source. At off-design operating conditions and without cavitation within the pump, the "non-rotational" noise is the predominant due to the rotating stall and vortices between the semi-open rotor blades and stationary casing, at Q < Qdes, and due to the laminar boundary layer vortex shedding, at Q > Qdes. When the cavitation within the pump occurs, the non-rotational noise predominates within the entire range of operating conditions. Special attention was given to the state of pump operation when the instability due to the stall or surge and cavitation occurs simultaneously, and to the noise generated thereof.
    Vir: Collected papers [Računalniška datoteka] (4aNSb8.pdf (4 str.))
    Vrsta gradiva - prispevek na konferenci
    Leto - 1999
    Jezik - angleški
    COBISS.SI-ID - 3353883

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