Unsteady Flow Structures and Pressure Pulsations in a Nuclear Reactor Coolant Pump With Spherical Casing
Unsteady Flow Structures and Pressure Pulsations in a Nuclear Reactor Coolant Pump With Spherical Casing
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球形壳体核反应堆冷却剂泵的非定常流动结构和压力脉动
DOI：
10.1115/1.4035638
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发表时间：
2017-05
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
核反应堆冷却剂泵（RCP）内流动不稳定性引起的严重振动对泵的安全运行是不利的。由于反应堆冷却塔特殊的球形壳体结构，其内部流动结构极其复杂和不确定。本文的主要目的是利用大涡模拟方法对反应堆内的非定常流动结构及其与压力脉动的关系进行全面的研究。详细描述了叶片尾缘涡量分布和脱落涡。此外，在某些特殊的区域，流动不稳定性和压力脉动之间的内在联系被阐明。很明显，压力谱中的一些主要激发分量是由脱落涡激发的。此外，叶片通过频率（fBPF）处的分量与叶轮出口的尾迹流和扩压器叶片尾缘脱落的非定常涡之间的动静叶相互作用密切相关。研究认为，反应堆压力脉动与相应的涡量分布和非定常涡脱落效应密切相关。
Severe vibrations induced by flow instabilities in the nuclear reactor coolant pump (RCP) are detrimental to the safe operation of the pump. Due to the particular spherical casing in the RCP, the internal flow structures are extremely ambiguity and complicated. The goal of the present work is to shed comprehensive light on the unsteady flow structures and its correlation with the pressure pulsations by using large eddy simulation (LES) method of the RCP. The vorticity distribution and the shedding vortex from the blade trailing edge are depicted in detail. Furthermore, the internal correlations between the flow unsteadiness and pressure pulsation are illustrated in some special regions of the RCP. Evidently, some main excitation components in the pressure spectra are excited by the shedding vortex. Besides, components at blade passing frequency (fBPF) are closely associated with rotor–stator interaction between the wake flow from the impeller outlet and unsteadiness vortexes shedding from the diffuser blade trailing edge. It is thought to be that the pressure pulsations of the RCP are closely associated with the corresponding vorticity distribution and the unsteady vortex shedding effect.
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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
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
发表时间：
2016-04
期刊：
Strojniški vestnik - Journal of Mechanical Engineering
影响因子：
--
作者：
Dan Ni;Minguan Yang;Bo Gao;Ning Zhang;Zhong Li
通讯作者：
Zhong Li
影响因子：
2.7
作者：
F. C. Rahim;P. Yousefi;Elnaz Ali-Akbari
通讯作者：
F. C. Rahim;P. Yousefi;Elnaz Ali-Akbari
影响因子：
1.7
作者：
Fan Zhang;S. Yuan;Q. Fu;Yi Tao
通讯作者：
Fan Zhang;S. Yuan;Q. Fu;Yi Tao
DOI：
10.1115/icone22-31075
发表时间：
2014-07
期刊：
--
影响因子：
--
作者：
Yun-Je Cho;Yeon-Sik Kim;S. Cho;S. Kim;B. Bae;H. Chung;Y. Youn;Jong-Kuk Park;H. Choi;Woo-Jin Jeon;Bok-Deuk Kim;T. Kwon;Chul H. Song
通讯作者：
Yun-Je Cho;Yeon-Sik Kim;S. Cho;S. Kim;B. Bae;H. Chung;Y. Youn;Jong-Kuk Park;H. Choi;Woo-Jin Jeon;Bok-Deuk Kim;T. Kwon;Chul H. Song