Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump
Flow Unsteadiness and Pressure Pulsations in a Nuclear Reactor Coolant Pump
复制标题
核反应堆冷却剂泵中的流动不稳定和压力脉动
DOI:
10.5545/sv-jme.2015.3192
复制
发表时间:
2016-04
期刊:
影响因子:
--
通讯作者:
Zhong Li
中科院分区:
文献类型:
--
作者:
Dan Ni;Minguan Yang;Bo Gao;Ning Zhang;Zhong Li
Unsteady flow induced by rotor-stator interaction is detrimental to the safe operation of the nuclear reactor coolant pump, so it is essential to clarify flow structures and pressure pulsation in such pumps, especially within the spherical casing. In this paper, unsteady flow characteristics in a mixed-flow nuclear reactor coolant model pump were investigated using large-eddy simulation (LES) method. Results show that at the nominal flow rate, in two particular diffuser channels near the spherical casing discharge nozzle, the flow structures are uneven compared with that in the other flow channels. The reason is associated with the position of the flow channel with respect to the spherical casing nozzle. Large- scale flow separation and backflow structures easily occur at the regions near these two channels. In the right and the middle region of the casing nozzle, due to the large-scale separate flow and high vorticity magnitude, unsteady flow structures are more complicated in comparison with the other regions. It has been found that the vorticity spectra and the pressure spectra almost have the same main excitation frequencies. Therefore, it has been confirmed that for particular regions pressure pulsations are determined by the shedding vortex wake from the diffuser blade trailing edge of the nuclear reactor coolant model pump.
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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
DOI:
10.5545/sv-jme.2015.2859
发表时间:
2016-01
期刊:
Strojniški vestnik-Journal of Mechanical Engineering
影响因子:
--
作者:
Ning Zhang;Minguan Yang;Bo Gao;Zhong Li;Dan Ni
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Dan Ni
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
DOI:
--
发表时间:
2009
期刊:
Journal of Power Engineering
影响因子:
--
作者:
Liang Jun
通讯作者:
Liang Jun
DOI:
10.1115/fedsm2002-31205
发表时间:
2002
期刊:
--
影响因子:
--
作者:
C. Kato;H. Mukai;A. Manabe
通讯作者:
C. Kato;H. Mukai;A. Manabe