Publication detail
The Modification of the Mixed Flow Pump with Respect to Stability of the Head Curve
KLAS, R. RUDOLF, P. POCHYLÝ, F.
Czech title
Modifikace diagonálního čerpadla s ohledem na stabilitu Y-Q charakteristiky
English title
The Modification of the Mixed Flow Pump with Respect to Stability of the Head Curve
Type
abstract
Language
en
Original abstract
The tested radiaxial pump shows the considerable pressure pulsations accompanied with the strong noise for the flow rates lower than 0.4QBEP. This fact makes almost impossible to determine experimentally the dependence of the specific energy on the flow rates close to shut-off point. Likewise, after relatively short running period the strong wear of blades occurs due to the cavitation damage.Original and modified designs of radiaxial pumps with the same design parameters will be used to demonstrate the above mentioned possibilities. First the disadvantages will be outlined and then possible solutions will be illustrated. Pump operation will be simulated by means of CFD software. Experimental characteristic curve is at disposal for the problematic pump.
Czech abstract
Zkoumané diagonální čerpadlo vykazuje značé tlakové pulsace doprovázené silným hlukem pro průtoky nižší než 0.4Qopt. Díky této skutečnosti je téměř nemožné určit experimentálně závislost měrné energie na průtoku v blízkosti závěrného bodu. Také po relativně krátké době chodu dochází v důsledku kavitace k silnému opotřebení lopatek. Původní a modifikovaná konstrukce čerpadla se stejnými parametry byla použita k rověření výše uvedených nedostatků. Provoz čerpadla bude simulován pomocí softwaru CFD a je rovněž k dispozici charakteristická křivka měrné energie.
English abstract
The tested radiaxial pump shows the considerable pressure pulsations accompanied with the strong noise for the flow rates lower than 0.4QBEP. This fact makes almost impossible to determine experimentally the dependence of the specific energy on the flow rates close to shut-off point. Likewise, after relatively short running period the strong wear of blades occurs due to the cavitation damage.Original and modified designs of radiaxial pumps with the same design parameters will be used to demonstrate the above mentioned possibilities. First the disadvantages will be outlined and then possible solutions will be illustrated. Pump operation will be simulated by means of CFD software. Experimental characteristic curve is at disposal for the problematic pump.
Keywords in English
radiaxial pump, pressure pulsations , instability
Released
14.05.2015
Location
Amsterdam, The Netherlands
ISSN
NEUVEDENO
Pages from–to
298–304
Pages count
6