| 引用本文: | 施允洋,刘方方,王维一,等.双吸泵静腔室数值优化与试验分析[J].灌溉排水学报,0,():-. |
| SHI Yunyang,LIU Fangfang,WANG Weiyi,et al.双吸泵静腔室数值优化与试验分析[J].灌溉排水学报,0,():-. |
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| 摘要: |
| 【目标】探究影响双吸离心泵效率的主要因素及关键参数，优化设计吸水室以提高水力性能。【方法】基于水力损失最小原则，对吸水室与蜗壳内部流道形状进行设计，研究过流断面面积演变规律。采用CFD数值计算方法对优化前后的泵内流特征及性能特性进行对比分析，并利用实体模型试验验证优化方案的实际性能。【结果】改良设计的工况点效率比原型设计提升3.36%；在0.7 QBEP（设计工况）至1.2 QBEP范围内，整泵效率相较改进前模型均有所提高。其中，蜗壳水力损失降低明显，除1.3 QBEP损失下降6.18%以外，其余工况下蜗壳水力损失降低幅度均超过20%。对于吸水室，大于0.98 QBEP流量工况时，改进后模型吸水室损失低于改进前模型。【结论】吸水室、蜗壳内部流道的优化设计，明显改善了吸水室内部的不稳定流动，消除了叶轮出口附近的流动旋涡，显著降低水力损失，有效提升双吸泵的水力效率。 |
| 关键词: 双吸泵;效率改进;流道形状重塑;计算流体动力学 |
| DOI： |
| 分类号:TH311 |
| 基金项目:宿迁市科技计划项目（K202114）；河南省重点研发与推广专项（科技攻关）项目（232102110286）；宿迁市智能制造重点实验室（M202108）；江苏省智能制造装备关键技术工程研究中心资助项目 |
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| Numerical Optimization and Experimental Analysis of Double-Suction Pump Casing Chambers |
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SHI Yunyang1, LIU Fangfang1, WANG Weiyi2, DENG Jianglin1
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1.Suqian University;2.Suqian college
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| Abstract: |
| 【Objective】Investigate the main factors and key parameters affecting the efficiency of double-suction centrifugal pumps, and optimize the design of the suction chamber to enhance hydraulic performance. 【Method】Based on the principle of minimum hydraulic loss, design the shapes of the suction chamber and the internal flow passage of the volute, and study the evolution law of the cross-sectional area of the flow passage. Utilize Computational Fluid Dynamics (CFD) numerical calculation method to conduct comparative analysis of the flow characteristics and performance characteristics inside the pump before and after optimization, and validate the practical performance of the optimization scheme through physical model experiments. 【Results】The efficiency of the improved design at rated operating conditions is increased by 3.36% compared to the prototype design; within the range of 0.7 QBEP (design condition) to 1.2 QBEP, the overall pump efficiency is improved compared to the model before improvement. The hydraulic loss of the volute is significantly reduced, with a reduction in losses exceeding 20% for all operating conditions except for a 6.18% reduction at 1.3 QBEP. For the suction chamber, when the flow condition exceeds 0.98 QBEP, the loss of the improved model is lower than that of the model before improvement. 【Conclusion】The optimized design of the suction chamber and the internal flow passage of the volute significantly improves the unstable flow inside the suction chamber, eliminates the flow vortices near the impeller outlet, significantly reduces hydraulic losses, and effectively enhances the hydraulic efficiency of the double-suction pump. |
| Key words: Double-suction;pump, efficiency;improvement, flow;passage reshaping, computational;fluid dynamics (CFD) |
