Investigation of Rotor-Stator Interaction and Flow Unsteadiness in a Low Specific Speed Centrifugal Pump
Investigation of Rotor-Stator Interaction and Flow Unsteadiness in a Low Specific Speed Centrifugal Pump
复制标题
低比转速离心泵转子-定子相互作用和流动不稳定性的研究
DOI：
10.5545/sv-jme.2015.2859
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发表时间：
2016-01
期刊：
影响因子：
--
通讯作者：
Dan Ni
中科院分区：
文献类型：
--
作者：
Ning Zhang;Minguan Yang;Bo Gao;Zhong Li;Dan Ni
由转子-定子干涉引起的瞬态流动对离心泵的稳定运行是不利的。本文采用大涡模拟（LES）方法对低比转速离心泵内的非定常动静干涉和流动结构进行了分析。为此，本文将压力脉动与涡结构的演化过程结合起来研究动静干涉，以阐明压力幅值与涡量分布之间的内在联系。结果表明，由于转子-定子相互作用，叶片通过频率（fBPF）处的明显峰值与监测点的位置密切相关。近舌区的非定常涡结构与叶轮相对于舌的相对位置有关，而蜗舌的上游效应对叶片压力侧的涡量分布有显著影响。转子-定子干扰主要由叶片后缘尾流中的旋涡脱落及其对蜗壳舌的冲击以及随后的切割和变形所控制。此外，高压振幅的产生与相应的高涡量观测以及。因此，它被证实的压力振幅显着相关的涡量大小。
Instantaneous flow dynamics induced by rotor-stator interaction are detrimental to the stable operation of centrifugal pumps. In this study, unsteady rotor-stator interaction and flow structures within a low specific-speed centrifugal pump are analysed using the Large Eddy Simulation (LES) method. For that purpose, pressure pulsation and the evolution process of a vortical structure are combined to investigate rotor-stator interaction in order to clarify the inherent correlation between pressure amplitude and vorticity distribution. The results show that distinct peaks at blade passing frequency (fBPF) are closely associated with the positions of the monitoring point due to rotor-stator interaction. An unsteady vortical structure at the near tongue region is related to the relative position of the impeller with respect to the tongue, and the upstream effect of the volute tongue significantly affects the vorticity distribution on the blade pressure side. Rotor-stator interaction is dominated by vortex shedding in the wake of the blade trailing edge and their impingement on the volute tongue with subsequent cutting and distortion. Moreover, the high-pressure amplitude is generated with the corresponding high vorticity magnitude observed as well. Therefore, it is confirmed that pressure amplitude is significantly associated with the corresponding vorticity magnitude.
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影响因子：
2.8
作者：
A. Posa;A. Lippolis;R. Verzicco;E. Balaras
通讯作者：
A. Posa;A. Lippolis;R. Verzicco;E. Balaras
影响因子：
2
作者：
Jorge L. Parrondo-Gayo;José González-Pérez;J. Fernandez-Francos
通讯作者：
Jorge L. Parrondo-Gayo;José González-Pérez;J. Fernandez-Francos
离心泵叶轮湍流大涡模拟中亚网格尺度模型的评估
DOI：
10.3901/cjme.2012.05.911
发表时间：
2012-09
期刊：
Chinese Journal of Mechanical Engineering (english Edition)
影响因子：
--
作者：
Zhengjun Yang;Fujun Wang
通讯作者：
Fujun Wang
影响因子：
2.4
作者：
J. Keller;E. Blanco;R. Barrio;J. Parrondo
通讯作者：
J. Keller;E. Blanco;R. Barrio;J. Parrondo
影响因子：
2
作者：
Byskov, RK;Jacobsen, CB;Pedersen, N
通讯作者：
Pedersen, N