{"title":"Calculation and experimental study on the flow instability behavior of a helically coiled steam generator","authors":"","doi":"10.1016/j.anucene.2024.110834","DOIUrl":null,"url":null,"abstract":"<div><p>The flow instability phenomenon in the helically coiled steam generator may cause continuous large oscillations in flow rate and wall temperature. An experimental and calculation study was carried out to investigate the flow instability behavior of a helically coiled heat exchanger. The flow instability threshold with thermal power within 0.6 MW–2.3 MW is obtained. The increase of inlet throttling and thermal power stabilize the system. Both of the tube-side and shell-side parameters, such as flow rate, temperature, and pressure affect the flow instability thresholds. In addition, the SGTH-1D code is used to simulate the flow instability threshold of the heat exchanger. The SGTH-1D code can accurately estimate the flow instability threshold of the heat exchanger. Finally, a new 3D flow instability map is proposed using the phase change number, the modified subcooled number and the inlet throttling number to estimate the flow instability threshold in the heat exchanger.</p></div>","PeriodicalId":8006,"journal":{"name":"Annals of Nuclear Energy","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Annals of Nuclear Energy","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0306454924004973","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"NUCLEAR SCIENCE & TECHNOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
The flow instability phenomenon in the helically coiled steam generator may cause continuous large oscillations in flow rate and wall temperature. An experimental and calculation study was carried out to investigate the flow instability behavior of a helically coiled heat exchanger. The flow instability threshold with thermal power within 0.6 MW–2.3 MW is obtained. The increase of inlet throttling and thermal power stabilize the system. Both of the tube-side and shell-side parameters, such as flow rate, temperature, and pressure affect the flow instability thresholds. In addition, the SGTH-1D code is used to simulate the flow instability threshold of the heat exchanger. The SGTH-1D code can accurately estimate the flow instability threshold of the heat exchanger. Finally, a new 3D flow instability map is proposed using the phase change number, the modified subcooled number and the inlet throttling number to estimate the flow instability threshold in the heat exchanger.
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.
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