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contributor authorNi, Dan
contributor authorYang, Minguan
contributor authorZhang, Ning
contributor authorGao, Bo
contributor authorLi, Zhong
date accessioned2017-11-25T07:16:25Z
date available2017-11-25T07:16:25Z
date copyright2017/16/3
date issued2017
identifier issn0098-2202
identifier otherfe_139_05_051103.pdf
identifier urihttp://138.201.223.254:8080/yetl1/handle/yetl/4233999
description abstractSevere 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.
publisherThe American Society of Mechanical Engineers (ASME)
titleUnsteady Flow Structures and Pressure Pulsations in a Nuclear Reactor Coolant Pump With Spherical Casing
typeJournal Paper
journal volume139
journal issue5
journal titleJournal of Fluids Engineering
identifier doi10.1115/1.4035638
journal fristpage51103
journal lastpage051103-14
treeJournal of Fluids Engineering:;2017:;volume( 139 ):;issue: 005
contenttypeFulltext


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