农业工程学报2011，Vol.27Issue(4)：147-152,6.DOI:10.3969/j.issn.1002-6819.2011.04.025
高比转速斜流泵内部非定常压力脉动特性
Unsteady flow pressure fluctuation of high-specific-speed mixed-flow pump
摘要
Abstract
In order to investigate the pressure fluctuation induced by the rotor-stator interactions of the mixed-flow pump,the standard turbulent k-ε model and SIMPLEC algorithm were applied to simulate the unsteady flow in a high-specific-speed mixed-flow pump.The pressure fluctuations at four representative locations under multi-conditions were obtained, and the time-domain and frequency-domain of each monitoring point were analyzed.Comparison of calculated steady flow head and efficiency with the test results verified that the inner flow characteristic simulated by this calculation method was comparatively accurate.The numerical results showed that the maximum pressure fluctuation appeared at impeller inlet where the pressure coefficient amplitude increased gradually from hub to rim; the fluctuation at impeller inlet became stronger with the deviation of flow rate from design point and the relative fluctuation at 0.7Qopt was about 0.5 time stronger than that at the design flow rate.The frequency domain transformed by Fast Fourier Transform (FFT) showed that the dominant frequency was approximate to the blade passing frequency.The numerical results can provide certain theoretical references to reveal the pressure fluctuation in the mixed-flow pump.关键词
泵/流场/数值分析/高比转速/压力脉动/非定常流动Key words
pumps/ flow fields/ numerical analysis/ high specific speed/ pressure fluctuation/ unsteady flow分类
机械制造引用本文复制引用
施卫东,邹萍萍,张德胜,周岭..高比转速斜流泵内部非定常压力脉动特性[J].农业工程学报,2011,27(4):147-152,6.基金项目
江苏高等学校优秀科技创新团队计划项目(苏教科(2009) 10号) （苏教科(2009）
国家科技人员服务企业行动项目(2009GJC30002) （2009GJC30002）
国家自然科学基金资助项目(51079063). （51079063）
