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| DOI：10.13522/j.cnki.ggps.2026044 |
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| Optimization of the spatial guide vane for improving the efficiency of high-flow seawater lift pumps |
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Liu Jieqiong, Lyu Zhongbin, Tang Lingdi, Gao Chao, You Baojian
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1. Shanghai Kaiquan Pump (Group) Co., Ltd., Shanghai 201800, China;
2. Technology and Research Center of Fluid Machinery Engineering, Jiangsu University, Zhenjiang 212013, China
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| Abstract: |
| 【Objective】High-flow seawater lift pumps are widely used in marine engineering applications, but they often exhibit low efficiency under high-flow conditions. This study investigates the feasibility of improving the efficiency of such pumps by optimizing their spatial guide vane.【Method】The study was based on the orthogonal design method. The pump efficiencies at the rated flow rate (Qn) and the off-design flow at rates of 1.2Qn and 0.8Qn were selected as the optimization objectives; the design variables were four geometric parameters of the vane: the maximum diameter of the outer streamline (D4), the corresponding axial length lD, the distance between the guide-vane leading edge and the impeller outlet (l), and the angle between the guide-vane leading edge and the impeller outlet (θ). The primary factors identified through the orthogonal design were subsequently optimized using response surface methodology (RSM). A regression model was established to determine the optimal geometric parameters of the vane. 【Result】The orthogonal experimental results showed that D4 had a significant effect on pump efficiency at both 1.2Qn and 0.8Qn. At the rated flow rate, the effects of D4 and lD on pump efficiency were comparable. Based on a comprehensive evaluation, the optimal geometric parameters of the spatial guide vane were D4=2 149 mm, lD=266 mm, l=155 mm and θ=15o.【Conclusion】Reducing the maximum outer diameter D4, together with a coordinated adjustment of the geometric parameters lD, l and θ can effectively improve the efficiency of the pump in the high-flow region while simultaneously reducing its radial size and manufacturing cost. These results provide a useful reference for efficiency-oriented optimization of high-flow seawater lift pumps. |
| Key words: seawater lift pump spatial guide vane efficiency optimization energy saving and efficiency improvement |
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