Influence of staggered guide vane on hydraulic performance of reactor coolant pump

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2024-08-10 DOI:10.1016/j.anucene.2024.110844

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Abstract

In order to investigate the influence of guide vane structure on hydraulic performance of reactor coolant pump (RCP) under coastdown condition, the guide vane structure was modified to form staggered guide vane by adding splitter plates that staggered flow channel across two layers. Numerical methods were used to compare the hydraulic performance characteristics of staggered guide vane and original guide vane in RCP. From the results, the external characteristics of RCP slightly decreased by staggered guide vane under coastdown condition. As the coastdown flow rate decreased, the difference in head and distribution of turbulent kinetic energy between two models diminished. The static pressure at impeller outlet and volute tongue increased by staggered guide vane, while distribution of high pressure inside guide vane of original model changed under coastdown condition. The area of high turbulent kinetic energy expanded due to staggered guide vane, which then became smaller after reaching the half-flow point. The pressure load on impeller blade increased by staggered guide vane, and the pressure load at impeller blade outlet was always lower than that of original guide vane. The minimum pressure appeared near the inlet of impeller, while the maximum pressure appeared near the streamline with a chord length of 0.8. Furthermore, vortex rope in outlet of staggered guide vane and outlet pipe of volute is smaller than that of original guide vane scheme.

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交错导叶对反应堆冷却剂泵液压性能的影响

为了研究导叶结构对沿岸下降条件下反应堆冷却剂泵（RCP）水力性能的影响，对导叶结构进行了改进，通过增加分流板形成交错导叶，使流道在两层间交错。采用数值方法比较了交错导叶和原始导叶在 RCP 中的水力性能特征。结果表明，在平流条件下，交错导叶使 RCP 的外部特性略有下降。随着平流流量的减小，两种模型之间的水头和湍流动能分布差异减小。交错导叶增加了叶轮出口和涡舌处的静压，而原模型导叶内部的高压分布在平流条件下发生了变化。高湍流动能区域因交错导叶而扩大，达到半流点后又变小。叶轮叶片上的压力负荷因交错导叶而增加，叶轮叶片出口处的压力负荷始终低于原始导叶。最小压力出现在叶轮入口附近，而最大压力出现在弦长为 0.8 的流线附近。此外，交错导叶出口和涡壳出口管中的涡绳也小于原始导叶方案。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.