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Noise as an indicator of cavitation in a centrifugal pump
Čudina, Mirko (Avtor)

URLURL - Predstavitvena datoteka, za dostop obiščite http://dx.doi.org/10.1134/1.1591303 Povezava se odpre v novem oknu

Izvleček
One of the sources of instability in a centrifugal pump is cavitation within the pump. Cavitation of a centrifugal pump is the result of insufficient net positive suction head (NPSH) and can occur within the entire range of operating conditions. Cavitation may cause three different and undesirable effects: (1) a drop in head-capacity and efficiency curves, (2) damage to the impeller by pitting and erosion, and (3) structure vibration and resulting noise. Therefore, the cavitation process must be prevented by all means. To prevent the onset of cavitation we have to detect the beginning of the cavitation process in the pump. To detect the beginning of the cavitation process, the emitted noise can be used, among other possibilities. Specifically, a noise spectra structure can be used to detect the beginning of cavitation and its development. Experiments have shown that there is a discrete frequency tone, at 147 Hz, which is strongly dependent on the cavitation process and its development. Therefore, noise spectra can also be used to determine the NPSH required or the critical value, representing the upper limit of the permissible pump operation without cavitation.

Jezik:Angleški jezik
Ključne besede:centrifugalne črpalke, kavitacija, hrup, centrifugal pumps, cavitation, noise
Vrsta gradiva:Delo ni kategorizirano (r6)
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Leto izida:2003
Št. strani:str. 463-474
Številčenje:Vol. 49, no. 4
UDK:534
ISSN pri članku:1063-7710
COBISS.SI-ID:5927195 Povezava se odpre v novem oknu
Število ogledov:1176
Število prenosov:106
Metapodatki:XML RDF-CHPDL DC-XML DC-RDF
 
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Naslov:Acoustical physics
Skrajšan naslov:Acoust. phys
Založnik:MAIK Nauka /Interperiodica
ISSN:1063-7710
COBISS.SI-ID:1502485 Povezava se odpre v novem oknu

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