第58卷第1期2024年1月原子能科学技术AtomicEnergyScienceandTechnologyVol.58,No.1Jan.2024老化效应对涂层表面池沸腾传热性能的影响钟达文，廉学新，史昊鹏，韩昱程（华北电力大学北京市非能动核能安全技术重点实验室，北京102206）摘要：压力容器外部冷却(ERVC)是第三代压水堆核电站严重事故缓解策略的关键技术，其表面临界热流密度（CHF)决定了压力容器的完整性。为探究压力容器真实材料SA508钢表面老化对涂层表面CHF特性的影响，开展了SA508钢光表面和基于SA508钢的TC4钛合金多孔涂层表面在不同老化状态下的沸腾换热特性实验研究。结果表明：SA508钢光表面在水中会快速氧化，随着老化的加深，其CHF呈上升趋势，上升幅度在20%以内；CHF增强的原因在于SA508钢氧化生成了能改善表面润湿性的Fe:O4磁性微纳米颗粒层。随着氧化的加深,TC4涂层表面由超亲水特性变为疏水特性，基体SA508钢生成的氧化物易堵塞涂层孔隙，CHF呈恶化趋势。关键词：相变；传热；涂层；沸腾换热；临界热流密度；氧化中图分类号：TL33；TQ026.4doi:10.7538/yzk.2023.youxian.0257EffectofAgingEffectonBoilingHeatTransferPerformanceofCoatingSurfaceZHONGDawen,LIANXuexin,SHIHaopeng,HANYucheng(BeijingKeyLaboratoryofPassiveNuclearPowerSafetyandTechnology,NorthChinaElectricPowerUniversity,Beijing102206,China)Abstract:Externalreactorvesselcooling(ERVC)isakeytechnologyinthesevereacci-dentmitigationstrategyofthirdgenerationpressurizedwaterreactornuclearpowerplants,andthecriticalheatflux(CHF)determinesthepressurevesselintegrity.Stud-iesonERVCboilingheattransferenhancedbycoatingshowthatcoatingsurfacecansig-nificantlyincreaseCHF,inordertoinvestigatetheagingeffectoftherealmaterialofnuclearreactorpressurevesselSA508steelsurfaceonCHFcharacteristicsofcoatingsurfaces,experimentalstudiesonboilingheattransfercharacteristicsofSA508steelbaresurfaceandTC4titaniumalloyporouscoatingsurfacebasedonSA508steelunderdifferentagingconditionswerecarriedout.ThesubstrateofSA508steelbaresurfacewasmadeofcopperblockand3mmthickSA508steelbyexplosivewelding.TheTC4titaniumalloyporouscoatingsurfacewaspreparedbysprayingparticlesonthebaresur-faceofSA508steelbysupersoniccoldgasspraytechnology.Themicro-scale(thediam-ete...
