| This article has been：Browse 1824Times Download 2929Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2017.11.012 |
|
| Effect of the Position of Guide Vane on Hydraulic Performance of the S-shaped Extension Pumping System |
|
WU Chenhui, TANG Fangping, SHI Lijian, XIE Chuanliu, ZHANG Wenpeng
|
|
School of Hydraulic, Energy and Power Engineering, Yangzhou University, Yangzhou 225127, China
|
| Abstract: |
| The influences of guide vane position on hydraulic performance of the S-shaped extension pumping system were studied in this paper numerically. We considered four positions and three flow conditions: designed flow (Q0), reduced flow (0.8Q0) and fast flow (1.2Q0). The results showed that with the relative position ofthe guide vane increasing, the efficiency and lifting height of the pump increased first before declining. The optimal relative distance between the guide vane and the impeller was 10 mm at which the energy loss in both the impeller body and the outlet passage was minimal, the pump efficiency and lift height peaked, and the guide vane was most effective in recovery of the kinetic energy. Under the reduced and designed flow rates, the average inlet vortex angle of the outlet passage and energy loss at the outlet passage decreased first before increasing. Under high flow rate, in contrast, the average vortex angle remained constant, independent of the relative position of the guide vane. |
| Key words: S-shaped extension pump; guide vane position; numerical; hydraulic performance |
|
|
