Effects of Volute Design and Number of Impeller Blades on Lateral Impeller Forces and Hydraulic Performance
A comparison is made between the characteristics of the measured lateral impeller forces and the hydraulic performances of a four- and a five-vane impeller, each operating in a spiral volute, a concentric volute, and a double volute. The pump's rotor was supported in magnetic bearings. In addit...
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| Format: | Article |
| Language: | English |
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Wiley
2003-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/S1023621X03000137 |
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| _version_ | 1832566594929164288 |
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| author | Daniel O. Baun Ronald D. Flack |
| author_facet | Daniel O. Baun Ronald D. Flack |
| author_sort | Daniel O. Baun |
| collection | DOAJ |
| description | A comparison is made between the characteristics of the measured lateral impeller forces and the hydraulic performances of a four- and a five-vane impeller, each operating in a spiral volute, a concentric volute, and a double volute. The pump's rotor was supported in magnetic bearings. In addition to supporting and controlling the rotor motion, the magnetic bearings also served as active load cells and were used to measure the impeller forces acting on the pump's rotor. The lateral impeller force characteristics, as a function of a normalized flow coefficient, were virtually identical in the four- and five-vane impellers in each respective volute type. The measured impeller forces for each volute type were compared with correlations in the literature. The measured forces from the double volute configurations agreed with the forces from a correlation model over the full flow range. Single volute configurations compared well with the predictions of a published correlation at high flow rates, ϕ/ϕn>0.5. Concentric volute configurations compared well with a published correlation at low flow rates, ϕ/ϕn<0.4. The head-versus-flow characteristics of the four-vane impeller in each volute type were stable over a greater flow range than the corresponding characteristics of the five-vane impeller. At higher flow rates in the stable region of the head's characteristic curves near the best efficiency point, the five-vane impeller produced higher head than did the four-vane impeller in each volute type. |
| format | Article |
| id | doaj-art-120998928ace406489d2fc93f7bd6b2e |
| institution | Kabale University |
| issn | 1023-621X |
| language | English |
| publishDate | 2003-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-120998928ace406489d2fc93f7bd6b2e2025-02-03T01:03:42ZengWileyInternational Journal of Rotating Machinery1023-621X2003-01-019214515210.1155/S1023621X03000137Effects of Volute Design and Number of Impeller Blades on Lateral Impeller Forces and Hydraulic PerformanceDaniel O. Baun0Ronald D. Flack1Concepts NREC, USADepartment of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, Virginia, USAA comparison is made between the characteristics of the measured lateral impeller forces and the hydraulic performances of a four- and a five-vane impeller, each operating in a spiral volute, a concentric volute, and a double volute. The pump's rotor was supported in magnetic bearings. In addition to supporting and controlling the rotor motion, the magnetic bearings also served as active load cells and were used to measure the impeller forces acting on the pump's rotor. The lateral impeller force characteristics, as a function of a normalized flow coefficient, were virtually identical in the four- and five-vane impellers in each respective volute type. The measured impeller forces for each volute type were compared with correlations in the literature. The measured forces from the double volute configurations agreed with the forces from a correlation model over the full flow range. Single volute configurations compared well with the predictions of a published correlation at high flow rates, ϕ/ϕn>0.5. Concentric volute configurations compared well with a published correlation at low flow rates, ϕ/ϕn<0.4. The head-versus-flow characteristics of the four-vane impeller in each volute type were stable over a greater flow range than the corresponding characteristics of the five-vane impeller. At higher flow rates in the stable region of the head's characteristic curves near the best efficiency point, the five-vane impeller produced higher head than did the four-vane impeller in each volute type.http://dx.doi.org/10.1155/S1023621X03000137 |
| spellingShingle | Daniel O. Baun Ronald D. Flack Effects of Volute Design and Number of Impeller Blades on Lateral Impeller Forces and Hydraulic Performance International Journal of Rotating Machinery |
| title | Effects of Volute Design and Number of Impeller Blades on Lateral Impeller Forces and Hydraulic Performance |
| title_full | Effects of Volute Design and Number of Impeller Blades on Lateral Impeller Forces and Hydraulic Performance |
| title_fullStr | Effects of Volute Design and Number of Impeller Blades on Lateral Impeller Forces and Hydraulic Performance |
| title_full_unstemmed | Effects of Volute Design and Number of Impeller Blades on Lateral Impeller Forces and Hydraulic Performance |
| title_short | Effects of Volute Design and Number of Impeller Blades on Lateral Impeller Forces and Hydraulic Performance |
| title_sort | effects of volute design and number of impeller blades on lateral impeller forces and hydraulic performance |
| url | http://dx.doi.org/10.1155/S1023621X03000137 |
| work_keys_str_mv | AT danielobaun effectsofvolutedesignandnumberofimpellerbladesonlateralimpellerforcesandhydraulicperformance AT ronalddflack effectsofvolutedesignandnumberofimpellerbladesonlateralimpellerforcesandhydraulicperformance |