Fluid-induced rotordynamic forces on a whirling centrifugal pump

详细信息    查看全文

• 作者：Dario Valentini^a ; ^{dariovalentini83@gmail.com} ; Giovanni Pace^a ; Angelo Pasini^b ; Lucio Torre^c ; Ruzbeh Hadavandi^a ; Luca d'Agostino^b
• 关键词：Rotordynamic ; Radial impeller ; Cavitation ; Performance
• 刊名：European Journal of Mechanics - B/Fluids
• 出版年：2017
• 出版时间：January-February 2017
• 年：2017
• 卷：61
• 期：part_P2
• 页码：336-345
• 全文大小：1677 K
• 卷排序：61

文摘

The experimental characterization of the rotordynamic fluid forces acting on a whirling centrifugal impeller has been investigated at different flow rates and cavitating conditions. The recently developed method for continuously measuring the rotordynamic forces at variable whirl ratios has been readapted and successfully applied for measuring the same forces at constant whirl ratio but variable cavitation number. The flowrate has a major influence on the stability of the rotordynamic forces at positive whirl ratios where a threshold flowrate separates the stable zone from the unstable. At negative whirl ratios, the normal force is typically unstable independently on the flow rate. Cavitation has always a destabilizing effect at positive whirl ratio while it can stabilize the rotordynamic forces at negative whirl ratio.