Publication detail
Stability of Q-Y characteristic of centrifugal pump
POCHYLÝ, F. HALUZA, M. DRÁBKOVÁ, S.
Czech title
Stabilita Q-Y charakteristiky odstředivého čerpadla
English title
Stability of Q-Y characteristic of centrifugal pump
Type
conference paper
Language
en
Original abstract
At the pumps of low specific speed it is possible, that near the point of zero discharge the Q-Y characteristic is unstable. This phenomenon of unstable Q-Y characteristic causes big pressures and discharge pulsations, which are characterized by self- excited oscillations of the systems. It is not recommended to run the pump between points of unstable characteristic. For this pump it is impossible to work in exacting operations (atomic power stations, heating plant stations, chemical industry). The stability conditions (Y,Q) are analyzed on the basis of dissipation function. It is assumed, that power input of the pump is linear function of the discharge.
Czech abstract
U čerpadel s nízkými specifickými otáčkami bývá Q-Y charakteristika v blízkosti závěrného bodu nestabilní. Tento jev způsobuje velké tlakové a průtokové pulsace, které jsou typické vznikem samobuzeného kmitaní v systému. Nedoporučuje se provozovat čerpadlo oblasti nestability. Průběh nestability je analyzován na základě průběhu disipační funkce. Předpokladem je lineární závislost výkonu na průtoku.
English abstract
At the pumps of low specific speed it is possible, that near the point of zero discharge the Q-Y characteristic is unstable. This phenomenon of unstable Q-Y characteristic causes big pressures and discharge pulsations, which are characterized by self- excited oscillations of the systems. It is not recommended to run the pump between points of unstable characteristic. For this pump it is impossible to work in exacting operations (atomic power stations, heating plant stations, chemical industry). The stability conditions (Y,Q) are analyzed on the basis of dissipation function. It is assumed, that power input of the pump is linear function of the discharge.
Keywords in Czech
Stabilita, charakteristika, čerpadlo, pulsace
Keywords in English
Stability, characteristics, pump, pulsations
RIV year
2009
Released
11.05.2009
Publisher
Akademoie věd České republiky
Location
Praha
ISBN
978-80-86246-35-2
Book
Engineering Mechanics 2009 - book of extended abstracts
Edition number
1
Pages from–to
208–215
Pages count
8
BIBTEX
@inproceedings{BUT29701,
author="František {Pochylý} and Miloslav {Haluza} and Sylva {Drábková},
title="Stability of Q-Y characteristic of centrifugal pump",
booktitle="Engineering Mechanics 2009 - book of extended abstracts",
year="2009",
month="May",
pages="208--215",
publisher="Akademoie věd České republiky",
address="Praha",
isbn="978-80-86246-35-2"
}