{"title":"The nucleation characteristics of geyser boiling in sodium heat pipes","authors":"","doi":"10.1016/j.anucene.2024.111010","DOIUrl":null,"url":null,"abstract":"<div><div>Many studies have been carried out on the geyser boiling phenomenon in liquid metal heat pipes, but most of them are phenomenological. Considering that nucleation should be the trigger of geyser boiling, occurrence of geyser boiling should be predicted by studying related nucleation characteristics. In this paper, the experimental value of nucleation superheat were gained and analyzed. The results showed that the main parameters affecting the nucleation superheat of sodium heat pipe were heating power and pressure, and the influences of wick mesh number, inclination angle, liquid filling ratio etc. were not important. By fitting the experimental data with heat flux and wall cavity vapor pressure, a correlation which could predict the data well was proposed. Further investigation showed that there may be materials with bad wetting properties in the wall cavities, whose surface thermo-physical properties could be greatly affected by temperature, resulting in the decrease of nucleation contact angle with increase in wall temperature.</div></div>","PeriodicalId":8006,"journal":{"name":"Annals of Nuclear Energy","volume":null,"pages":null},"PeriodicalIF":1.9000,"publicationDate":"2024-10-29","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/S030645492400673X","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
Many studies have been carried out on the geyser boiling phenomenon in liquid metal heat pipes, but most of them are phenomenological. Considering that nucleation should be the trigger of geyser boiling, occurrence of geyser boiling should be predicted by studying related nucleation characteristics. In this paper, the experimental value of nucleation superheat were gained and analyzed. The results showed that the main parameters affecting the nucleation superheat of sodium heat pipe were heating power and pressure, and the influences of wick mesh number, inclination angle, liquid filling ratio etc. were not important. By fitting the experimental data with heat flux and wall cavity vapor pressure, a correlation which could predict the data well was proposed. Further investigation showed that there may be materials with bad wetting properties in the wall cavities, whose surface thermo-physical properties could be greatly affected by temperature, resulting in the decrease of nucleation contact angle with increase in wall temperature.
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.