INVESTIGATING CAVITATION IN AN IMPELLER OF A CENTRIFUGAL PUMP
Abstract
Results obtained in studying cavitation phenomena in an impeller of a centrifugal pump are analyzed, and recommendations are given for improving the anticavitation properties of pumps. It was concluded that: (1) the outer cavitational characteristics of a centrifugal pump cannot serve as a basis of determining the moment of origination of cavitation; (2) cavitation in a centrifugal pump may originate at pressures at the intake of the pump, exceeding by much the pressure, at which there is a noticeable drop in delivery and efficiency of the pump; and (3) a sharp drop in the delivery of a centrifugal pump takes place when cavitation envolopes the intake section of the intervane duct over the entire section. Cavitation in intervane ducts of a centrifugal pump impeller represents not an interrupted jet flow with specific separation boundary, but a flow with multitude of moving caverns; and cavitational characteristics of centrifugal impellers can be improved considerably by enlarging in the planning projection the width of the initial section of the intervane duct. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 31, 1961
- Accession Number
- AD0259573
Entities
People
- M.a. Peshkin
- V.i. Dumov
Organizations
- National Air and Space Intelligence Center