Number Matching Analysis of Impeller and Guide Vane in a Mixed-flow Pump
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
11
Page:
51-56
Column:
Date of publication:
2020-06-05
- Keywords:
-
mixed-flow pump
; font-size: 10pt; ">impeller; guide vane; matching
- Abstract:
-
Reasonable matching of the number of impeller and guide vane is an important factor to ensure the efficient and stable operation of pump station and pump device in large water diversion projects. In order to explore the matching relationship between impeller and guide vane of a mixed- flow pump, a total of 12 matching schemes of impeller blade number Z1 and guide vane number Z2 were calculated by computational fluid dynamics. For each scheme, three flow rates of 0.8Q0,Q0 and 1.2Q0 were calculated, and the reliability of the numerical simulation results was verified by model test. When the number of impeller blade was changed, the hydraulic performance of the mixed-flow pump varied greatly under different flow conditions. Appropriate increase in the number of impeller blade, the impeller head increased, and the impeller cavitation performance was improved. However, it would also increase the friction loss and decrease the efficiency, and the difference was more obvious with the increase of flow rate. Under different working conditions, influence of changing the blade number of guide vane on hydraulic loss of the pump section was obvious, and the selection of a reasonable blade number of guide vane was effective and feasible to improve the overall performance of the mixed-flow pump section.
Last Update:
2020-06-01