| Statistical analysis of pressure fluctuations during unsteady flow for low-specific-speed centrifugal pumps简 |
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| 引用本文： | 裴吉,王文杰,袁寿其. Statistical analysis of pressure fluctuations during unsteady flow for low-specific-speed centrifugal pumps简[J]. 中南工业大学学报(英文版), 2014, 0(3): 1017-1024 |
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| 作者姓名： | 裴吉 王文杰 袁寿其 |
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| 基金项目： | Projects（51239005, 51009072） supported by the National Natural Science Foundation of China; Project（2011BAF14B04） supported by the National Science ＆ Technology Pillar Program of China; Project（13JDG084） supported by the Research Foundation for Advanced Talents of Jiansu University, China |
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| 摘 要： | A three-dimensional transient numerical simulation was conducted to study the pressure fluctuations in low-specific-speed centrifugal pumps. The characteristics of the inner flow were investigated using the SST k-ω turbulence model. The distributions of pressure fluctuations in the impeller and the volute were recorded, and the pressure fluctuation intensity was analyzed comprehensively, at the design condition, using statistical methods. The results show that the pressure fluctuation intensity increases along the impeller streamline from the leading edge to the trailing edge. In the impeller passage, the intensity near the shroud is much higher than that near the hub at thc inlet. However, the intensity at the middle passage is almost equal to the intensity at the outlet. The pressure fluctuation intensity is the highest at the trailing edge on the pressure side and near the tongue because of the rotor-stator interaction. The distribution of pressure fluctuation intensity is symmetrical in the axial cross sections of the volute channel. However, this intensity decreases with increasing radial distance. Hence, the pressure fluctuation intensity can be reduced by modifying the geometry of the leading edge in the impeller and the tongue in the volute.
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| 关 键 词： | 压力波动 低比转速 离心泵 非定常流动 统计分析 三维瞬态数值模拟 波动强度 脉动强度 |
Statistical analysis of pressure fluctuations during unsteady flow for low-specific-speed centrifugal pumps |
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| PEI Ji,WANG Wen-jie,YUAN Shou-qi. Statistical analysis of pressure fluctuations during unsteady flow for low-specific-speed centrifugal pumps[J]. Journal of Central South University of Technology, 2014, 0(3): 1017-1024 |
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| Authors: | PEI Ji WANG Wen-jie YUAN Shou-qi |
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| Affiliation: | Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China |
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| Abstract: | transient pressure fluctuation intensity statistics low specific speed centrifugal pump |
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| Keywords: | transient pressure fluctuation intensity statistics low specific speed centrifugal pump |
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