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Liquid metal thermal hydraulics R&D at European scale: achievements and prospects
《能源前沿(英文)》 2021年 第15卷 第4期 页码 842-853 doi: 10.1007/s11708-021-0743-2
Core designing of a new type of TVS-2M FAs: neutronics and thermal-hydraulics design basis limits
Saeed GHAEMI, Farshad FAGHIHI
《能源前沿(英文)》 2021年 第15卷 第1期 页码 256-278 doi: 10.1007/s11708-018-0583-x
关键词: TVS-2M FAs core design basis limits VVER-1000 analysis mixture of uranium-gadolinium oxides fuels thermal-hydraulics PARCS WIMS-D5
Jinya KATSUYAMA, Shumpei UNO, Tadashi WATANABE, Yinsheng LI
《机械工程前沿(英文)》 2018年 第13卷 第4期 页码 563-570 doi: 10.1007/s11465-018-0487-9
The thermal hydraulic (TH) behavior of coo-lant water is a key factor in the structural integrity assessments on reactor pressure vessels (RPVs) of pressurized water reactors (PWRs) under pressurized thermal shock (PTS) events, because the TH behavior may affect the loading conditions in the assessment. From the viewpoint of TH behavior, configuration of plant equipment and their dimensions, and operator action time considerably influence various parameters, such as the temperature and flow rate of coolant water and inner pressure. In this study, to investigate the influence of the operator action time on TH behavior during a PTS event, we developed an analysis model for a typical Japanese PWR plant, including the RPV and the main components of both primary and secondary systems, and performed TH analyses by using a system analysis code called RELAP5. We applied two different operator action times based on the Japanese and the United States (US) rules: Operators may act after 10 min (Japanese rules) and 30 min (the US rules) after the occurrence of PTS events. Based on the results of TH analysis with different operator action times, we also performed structural analyses for evaluating thermal-stress distributions in the RPV during PTS events as loading conditions in the structural integrity assessment. From the analysis results, it was clarified that differences in operator action times significantly affect TH behavior and loading conditions, as the Japanese rule may lead to lower stresses than that under the US rule because an earlier operator action caused lower pressure in the RPV.
关键词: structural integrity reactor pressure vessel pressurized thermal shock thermal hydraulic analysis pressurized water reactor weld residual stress
压水堆熔融物堆内滞留策略:历史回顾与研究展望 Review
马卫民,元一单,Bal Raj Sehgal
《工程(英文)》 2016年 第2卷 第1期 页码 103-111 doi: 10.1016/J.ENG.2016.01.019
本文对广泛应用于第三代压水堆的严重事故缓解措施——熔融物堆内滞留(IVR)进行了历史回顾。IVR策略最早源自于第二代反应堆Lovissa VVER-440的改进设计,以应对堆芯熔化事故。随后,IVR策略被应用于许多新设计的反应堆,如西屋的AP1000、韩国的APR1400以及中国的先进压水堆CAP1400和华龙一号。对IVR策略有效性影响最大的因素分别为堆内堆芯熔化进程、熔融物加载于压力容器壁面的热流密度和压力容器外部冷却。对于堆芯熔化进程,过去人们一直仅关注压力容器下腔室内熔池的换热行为。但通过回顾与分析,本文认为堆内的其他现象,如堆芯的降级和迁移、碎片床的形成及其可冷却性以及熔池的动态形成过程等,可能也会对熔池的最终状态及其作用于下封头的热负荷产生影响。通过对相关研究的回顾,本文希望找出IVR策略的研究中有待完善的部分,并据目前发展水平提出未来IVR研究的需求。
Min PAN, Andrew PLUMMER
《机械工程前沿(英文)》 2018年 第13卷 第2期 页码 225-231 doi: 10.1007/s11465-018-0509-7
This paper reviews recent developments in digital switched hydraulics particularly the switched inertance hydraulic systems (SIHSs). The performance of SIHSs is presented in brief with a discussion of several possible configurations and control strategies. The soft switching technology and high-speed switching valve design techniques are discussed. Challenges and recommendations are given based on the current research achievements.
关键词: digital hydraulics switched inertance hydraulic systems energy efficiency high-speed switching valve fluid-borne noise
Assessment indices for uniform and non-uniform thermal environments
ZHANG Yufeng, SUN Shufeng, ZHAO Rongyi
《能源前沿(英文)》 2008年 第2卷 第2期 页码 129-133 doi: 10.1007/s11708-008-0029-y
关键词: thermal sensation proper assessment relationship equivalent thermal acceptability
樊启祥
《中国工程科学》 2004年 第6卷 第1期 页码 48-52
三峡工程双线五级船闸通航建筑物的总体布置,涉及泥沙淤积碍航、船闸输水系统水力学、高陡边坡处理、主要金属结构及机电设备制造和技术等方面问题都有特殊要求,必须通过充分的科学试验、论证和工程实践,逐步予以解决。
Coupling evaluation for material removal and thermal control on precision milling machine tools
《机械工程前沿(英文)》 2022年 第17卷 第1期 页码 12-12 doi: 10.1007/s11465-021-0668-9
关键词: machine tools cutting energy efficiency thermal stability machining accuracy coupling evaluation
An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal
Qi WEI, Xiaohui ZHANG
《能源前沿(英文)》 2010年 第4卷 第4期 页码 507-516 doi: 10.1007/s11708-010-0017-x
关键词: thermal convection porous media viscoelastic fluid thermal nonequilibrium model
Yaolin LIN, Wei YANG
《能源前沿(英文)》 2021年 第15卷 第2期 页码 550-563 doi: 10.1007/s11708-019-0607-1
关键词: ANN (artificial neural network) exhaustive-listing building shape optimization thermal load thermal comfort
Flow and thermal modeling of liquid metal in expanded microchannel heat sink
《能源前沿(英文)》 页码 796-810 doi: 10.1007/s11708-023-0877-5
关键词: liquid metal cooling heat sink expanded microchannel flow and thermal modeling
《化学科学与工程前沿(英文)》 2023年 第17卷 第8期 页码 1038-1050 doi: 10.1007/s11705-022-2279-3
关键词: cellulose polyelectrolytes phase change materials thermal energy storage light-to-thermal conversion
《化学科学与工程前沿(英文)》 2022年 第16卷 第4期 页码 475-483 doi: 10.1007/s11705-021-2070-x
关键词: non-thermal plasma surface functionalization biochar modification wastewater treatment supercapacitor
Synthesis, characterization and assessment thermal properties of clay based nanopigments
Mohammad Banimahd KIEVANI, Milad EDRAKI
《化学科学与工程前沿(英文)》 2015年 第9卷 第1期 页码 40-45 doi: 10.1007/s11705-015-1505-7
关键词: nanopigment layered silicate cationic dye thermal properties
Elastic modulus and thermal stress in coating during heat cycling with different substrate shapes
Daniel GAONA,Alfredo VALAREZO
《机械工程前沿(英文)》 2015年 第10卷 第3期 页码 294-300 doi: 10.1007/s11465-015-0351-0
The elastic modulus of a deposit (Ed) can be obtained by monitoring the temperature (?T) and curvature (?k) of a one-side coated long plate, namely, a one-dimensional (1D) deformation model. The aim of this research is to design an experimental setup that proves whether a 1D deformation model can be scaled for complex geometries. The setup includes a laser displacement sensor mounted on a robotic arm capable of scanning a specimen surface and measuring its deformation. The reproducibility of the results is verified by comparing the present results with Stony Brook University Laboratory’s results. The ?k-?T slope error is less than 8%, and the Ed estimation error is close to 2%. These values reveal the repeatability of the experiments. Several samples fabricated with aluminum as the substrate and 100MXC nanowire (Fe and Cr alloy) as the deposit are analyzed and compared with those in finite element (FE) simulations. The linear elastic behavior of 1D (flat long plate) and 2D (squared plate) specimens during heating/cooling cycles is demonstrated by the high linearity of all ?k-?T curves (over 97%). The Ed values are approximately equal for 1D and 2D analyses, with a median of 96 GPa and standard deviation of 2 GPa. The correspondence between the experimental and simulated results for the 1D and 2D specimens reveals that deformation and thermal stress in coated specimens can be predicted regardless of specimen geometry through FE modeling and by using the experimental value of Ed. An example of a turbine-blade-shaped substrate is presented to validate the approach.
关键词: in-plane Young’s modulus curvature temperature thermal stress coating
标题 作者 时间 类型 操作
Core designing of a new type of TVS-2M FAs: neutronics and thermal-hydraulics design basis limits
Saeed GHAEMI, Farshad FAGHIHI
期刊论文
Influence evaluation of loading conditions during pressurized thermal shock transients based on thermal-hydraulics
Jinya KATSUYAMA, Shumpei UNO, Tadashi WATANABE, Yinsheng LI
期刊论文
Assessment indices for uniform and non-uniform thermal environments
ZHANG Yufeng, SUN Shufeng, ZHAO Rongyi
期刊论文
Coupling evaluation for material removal and thermal control on precision milling machine tools
期刊论文
An autonomous system for thermal convection of viscoelastic fluids in a porous layer using a thermal
Qi WEI, Xiaohui ZHANG
期刊论文
ANN-exhaustive-listing method for optimization of multiple building shapes and envelope properties with maximum thermal
Yaolin LIN, Wei YANG
期刊论文
Encapsulation of polyethylene glycol in cellulose-based porous capsules for latent heat storage and light-to-thermal
期刊论文
Non-thermal plasma enhances performances of biochar in wastewater treatment and energy storage applications
期刊论文
Synthesis, characterization and assessment thermal properties of clay based nanopigments
Mohammad Banimahd KIEVANI, Milad EDRAKI
期刊论文