Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet-Nozzle
It has been shown that the sudden decrease of pump head in an axial flow pump caused by stall can be overcome by means of casing treatment. Flat axial grooves in front of the impeller break the swirl of the near-casing backflow. The disadvantage of this method is strong cavitation at the inlet of th...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2008-01-01
|
| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2008/536850 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832562180847828992 |
|---|---|
| author | P. Pérez Flores G. Kosyna D. Wulff |
| author_facet | P. Pérez Flores G. Kosyna D. Wulff |
| author_sort | P. Pérez Flores |
| collection | DOAJ |
| description | It has been shown that the sudden decrease of pump head in an axial flow pump caused by stall can be overcome by means of casing treatment. Flat axial grooves in front of the impeller break the swirl of the near-casing backflow. The disadvantage of this method is strong cavitation at the inlet of the grooves for flow rates below the stall point. In this paper another improved method to stabilize the performance curve will be presented, using a double-inlet-nozzle. At the onset of stall the initial near-casing backflow with its high swirl is lead off into the gap between both nozzles. At design conditions this double-inlet-nozzle is working as an injector, supporting the near-casing-inflow. The function of the double-inlet-nozzle is demonstrated by PIV-measurements. |
| format | Article |
| id | doaj-art-4e3b6395771541abaa089bdbbf62e0b0 |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2008-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-4e3b6395771541abaa089bdbbf62e0b02025-02-03T01:23:17ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342008-01-01200810.1155/2008/536850536850Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet-NozzleP. Pérez Flores0G. Kosyna1D. Wulff2Pfleiderer-Institut, TU-Braunschweig, Langer Kamp 6, 38106 Braunschweig, GermanyPfleiderer-Institut, TU-Braunschweig, Langer Kamp 6, 38106 Braunschweig, GermanyPfleiderer-Institut, TU-Braunschweig, Langer Kamp 6, 38106 Braunschweig, GermanyIt has been shown that the sudden decrease of pump head in an axial flow pump caused by stall can be overcome by means of casing treatment. Flat axial grooves in front of the impeller break the swirl of the near-casing backflow. The disadvantage of this method is strong cavitation at the inlet of the grooves for flow rates below the stall point. In this paper another improved method to stabilize the performance curve will be presented, using a double-inlet-nozzle. At the onset of stall the initial near-casing backflow with its high swirl is lead off into the gap between both nozzles. At design conditions this double-inlet-nozzle is working as an injector, supporting the near-casing-inflow. The function of the double-inlet-nozzle is demonstrated by PIV-measurements.http://dx.doi.org/10.1155/2008/536850 |
| spellingShingle | P. Pérez Flores G. Kosyna D. Wulff Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet-Nozzle International Journal of Rotating Machinery |
| title | Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet-Nozzle |
| title_full | Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet-Nozzle |
| title_fullStr | Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet-Nozzle |
| title_full_unstemmed | Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet-Nozzle |
| title_short | Suppression of Performance Curve Instability of an Axial-Flow Pump by Using a Double-Inlet-Nozzle |
| title_sort | suppression of performance curve instability of an axial flow pump by using a double inlet nozzle |
| url | http://dx.doi.org/10.1155/2008/536850 |
| work_keys_str_mv | AT pperezflores suppressionofperformancecurveinstabilityofanaxialflowpumpbyusingadoubleinletnozzle AT gkosyna suppressionofperformancecurveinstabilityofanaxialflowpumpbyusingadoubleinletnozzle AT dwulff suppressionofperformancecurveinstabilityofanaxialflowpumpbyusingadoubleinletnozzle |