检索结果-内蒙古大学图书馆

Performance of cone meter for measuring cryogenic fluid considering cavitation

International Journal of Fluid Machinery and Systems 2019年第1期12卷 12-21页

作者： He, Denghui Chang, Zhuang Bai, Bofeng Chen, Senlin Guo, Pengcheng State Key Laboratory of Eco-hydraulic in Northwest Arid Region Xi’an University of Technology NO.5 South Jinhua Road Xi’an710048 China State Key Laboratory of Multiphase Flow in Power Engineering Xi’an Jiaotong University No.28 Xianning West Road Xi’an710049 China

The performance of the cone meter when measuring the cryogenic fluid was investigated by numerical simulation. The results show that the discharge coefficient and pressure loss coefficient of the cone meter are almost constant when the Reynolds number in the "stable region". The cryogenic fluids, especially the liquid hydrogen, have wider stable Reynolds number ranges than the water. There is little effect of cavitation on the discharge coefficient and pressure loss coefficient at the initial stage of cavitation. Thus the effect of slight cavitation on the measurement error of the flow rate is small, whose relative error is less than ±0.5% in present cases. This study opens a new avenue for measuring the flow rate of the cryogenic fluid. © 2019, Turbomachinery Society of Japan. All rights reserved.

关键词： Cavitation

来源：评论

学校读者我要写书评

暂无评论

An optimal design of the widths of heat affect zone, fusion zone, and near interface zone in a dissimilar metal welded joint

Material Design and Processing Communications

引用

Material Design and Processing Communications 2020年第5期2卷

作者： Guo, Guoliang Yang, Jie Wang, Lei Liu, Guiqiu Zhang, Baozhong Zhang, Sihan Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering School of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai China Consumer Appliances Centre Shandong Product Quality Inspection Research Institute Shandong China

The optimal design of the dissimilar metal welded joint is a valuable research issue, whether optimize the material, processing technology, dimension, or anything else. The fracture behavior of the dissimilar metal welded joint have been found affected by the widths of heat affect zone, fusion zone, and near interface zone. In this study, the optimal design of the widths of heat affect zone, fusion zone, and near interface zone in the dissimilar metal welded joint was further studied systematically. Firstly, a dissimilar metal welded joint, which used in the nuclear power plants with either heat affect zone crack or fusion zone crack, was selected, and a width mismatch coefficient MW was defined. In addition, the crack propagation paths and J-resistance curves of the dissimilar metal welded joints under different MW induced by the widths of heat affect zone, fusion zone, and near interface zone were calculated. Based on the obtained results, the widths of heat affect zone, fusion zone, and near interface zone were optimized. This study will provide support for the design of the dissimilar metal welded joint and is significant to the structure integrity assessment of the nuclear power plants. © 2019 John Wiley & Sons, Ltd.

关键词： Nuclear fuels

来源：评论

学校读者我要写书评

暂无评论

Investigation of curvature statistics of turbulent premixed Bunsen flames based on leading points concept 12

Investigation of curvature statistics of turbulent premixed ...

引用

12th Asia-Pacific Conference on Combustion, ASPACC 2019

作者： Zhang, Weijie Wang, Jinhua Xia, Hao Lin, Wenjun Zhang, Meng Huang, Zuohua State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University No. 28 Xian Ning Road Beilin District Xi'an Shaanxi710049 China

In previous studies, it was showed that the leading point, namely, the positively curved flame front, may be vital in controlling the propagation of flame, thus controlling the burning intensity of turbulent premixed flames. This paper is aimed at investigating the morphologies of the leading points under low and relatively high turbulence intensities based on flame curvature statistics. Premixed C3H8/H2/air flames were obtained with a Bunsen burner. Flame front was captured with OH-PLIF technique. The results show prevalent leading points with positive curvatures at low turbulence intensity. Percentage of positive curvatures were observed to increase at lower turbulence intensity. However, with increasing turbulence intensity, such feature can be mitigated or even overpowered with equal probability of negative and positive curvatures. Proper models for leading point are recommended according to the experimental results. However, question remains as to the underlying mechanism of leading point concept. © Asia-Pacific Conference on Combustion, ASPACC *** right reserved.

关键词： Combustion

来源：评论

学校读者我要写书评

暂无评论

Failure Analysis of Tube-Burst on T91 Platen Superheater of 600 MW Supercritical Boiler

Failure Analysis of Tube-Burst on T91 Platen Superheater of ...

引用

Artificial Intelligence and Electromechanical Automation (AIEA), International Conference on

作者： Ke Sun Jia'an Wang Yu Yan Jiahao Jiang Lei Deng State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'an Jiaotong University Xi'an China China Huadian Electric Power Research Institute Co. Ltd. Hangzhou China

ISBN: (数字)9781728182889

ISBN: (纸本)9781728182896

In this paper, the specimen of the bursting tubes, original tube and oxide-like debris are analysed in-depth by macroscopic examination, chemical composition analysis, mechanical properties, metallographic examination, scanning electron microscopy and energy spectrum analysis etc.,. It shows that the main reason for the tube-burst is that the original oxide matters or time-original oxide matters blocks the tube, reducing the cooling effect of the steam, and resulting in a short-term overheating of the tube. It is recommended to control the internal cleanliness of boiler equipment and pipest.

关键词： component tube burst failure analysis oxide matters over temperature FAILURE ANALYSIS excess temperature platen superheater Energy Dispersive X-Ray Spectroscopy oxides Cooling effects tube reducing

来源：评论

学校读者我要写书评

暂无评论

Analysis of Frequent Tube Burst of High Temperature Reheater in 600 MW Unit

Analysis of Frequent Tube Burst of High Temperature Reheater...

引用

Sustainable power and Energy Conference (iSPEC)

作者： Ke Sun Jia'an Wang Yu Yan Jiahao Jiang Lei Deng Defu Che China Huadian Electric Power Research Institute Co. Ltd. Hangzhou China State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'an Jiaotong University Xi'an China

ISBN: (数字)9781728191645

ISBN: (纸本)9781728191652

The reasons of frequent tube burst of the high temperature reheater in a supercritical 600 MW unit were systematically investigated via the examination of macroscopic inspection, chemical composition, mechanical properties, microstructures, scanning electron microscope and energy disperse spectroscopy detection. It is demonstrated that the tube burst of the high temperature reheater results from not only design factors, but also manufacture quality. Due to the absence of solid solution treatment in spare elbow, the inner dislocations and residual stress increase obviously, which accelerates the precipitation of carbide containing Cr and the formation of Cr depleted zone on grain boundary(GB) subsequently, leading to the decrease of GB corrosion resistance and the final leakage of high temperature reheater tube induced by intergranular corrosion.

关键词： Temperature Corrosion Welding Electron tubes Residual stresses Acceleration Elbow

来源：评论

学校读者我要写书评

暂无评论

Experimental Study on the Characteristics of Effervescent Atomization

引用

Kung Cheng Je Wu Li Hsueh Pao/Journal of engineering Thermophysics 2019年第4期40卷 834-838页

作者： Wang, Wen-Jie Zheng, Xue-Bo Bai, Bo-Feng State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China

In this paper, the characteristics of effervescent atomization are studied experimentally. A high speed camera was used to record the bubbling process and the change of the flow regime in the mixing chamber. Three typical flow regimes were observed, namely, bubble flow, transition flow and annular flow. The particle size of the spray droplet was measured by a laser particle sizer. The droplet diameter distribution curve under typical flow regimes was obtained. Bubble flow and annular flow showed a single peak distribution, while transition flow showed a bimodal distribution. The effects of parameters such as gas-liquid ratio (GLR), liquid mass flow rate and orifice diameter on droplet size were studied. The results showed that the larger the GLR, the larger the liquid mass flow rate and the smaller the orifice diameter, the smaller the SMD. The instability of the atomization process is analyzed. The larger the GLR and the smaller the orifice diameter, the greater the instability. © 2019, Science Press. All right reserved.

关键词： Atomization

来源：评论

学校读者我要写书评

暂无评论

Digital techniques assisted in tailoring electrode structure to optimize electrode performance

引用

Energy Storage Materials 2025年 80卷

作者： Heng Huang Zhifu Zhou Wei-Tao Wu Lei Wei Chengzhi Hu Jiaxuan Ma Linsong Gao Yang Li Yubai Li Yongchen Song Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of Technology Dalian 116023 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an 710049 China School of Mechanical Engineering Nanjing University of Science and Technology Nanjing 210094 China Department of Mechanical and Energy Engineering Southern University of Science and Technology Shenzhen 518055 China School of Mechanical Engineering and Mechanics Xiangtan University Xiangtan 411105 China

Poor rate performance limits the application of high-areal-loading electrodes in energy storage, and optimizing the microstructure of the cathode is considered as a way to improve this limitation. In this study, we integrated X-ray computed tomography (XCT) with digital technology (virtual electrodes and microstructure-based numerical simulations) to quantify the correlation between electrode structure and internal kinetic performance of lithium-ion electrodes. Results show that electrode structure alters the internal kinetic properties, thereby affecting rate capacity and nominal potential. Based on the parametric relationship between electrode structure and electrochemical-thermal properties, we explored the effects of structural regulation on electrode performance. Vertical channels significantly enhanced the rate capability and ohmic heating rate of small-particle electrodes, while solid-phase diffusion (SPD) dominated the discharge performance of large-particle electrodes, exhibiting low sensitivity to tortuous strategies. Furthermore, electrodes with abundant SPD barriers exhibit unidirectional propagation of reaction fronts, resulting in a deeper SPD-limited region. This observation inspired the integration of two structural strategies that favor both mass transport and reaction penetration. Optimized electrode structures enhanced energy density at high rates and accommodated diverse particle sizes and thicknesses. Additionally, the coupling effect of the heat transfer environment on electrode performance was investigated. This study presents a novel paradigm for bottom-up electrode design using microstructure-resolved model, providing both microscopic mechanisms and quantitative insights for advanced battery development.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Suppression thermal runaway propagation of LiFePO4 batteries during nail penetration test based on liquid immersion cooling

引用

Energy 2025年 330卷

作者： Liu, Xinyu Li, Yang Gao, Shuai Lv, Xuecheng Zhou, Zhifu Wu, Wei-Tao Wei, Lei Lyu, Jizu Li, Yubai Song, Yongchen Key Laboratory of Ocean Energy Utilization and Energy Conservation of Ministry of Education Dalian University of Technology Dalian116024 China State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Xi'an710049 China School of Mechanical Engineering Nanjing University of Science and Technology Nanjing210094 China Department of Mechanical and Energy Engineering Southern University of Science and Technology Shenzhen518055 China School of Mechanical Engineering Guangdong Ocean University Zhanjiang524088 China

The thermal safety accidents of high specific energy lithium-ion batteries (LIBs) occur frequently, impeding their further large-scale application in electric vehicles. In this study, the experimental systems for semi-open and sealed spaces are established. Meanwhile, based on the liquid immersion cooling (LIC) system, the thermal runaway (TR) suppression mechanisms of the single LIB and LIB pack are reported systematically. For the single LIB (two pouch cells connected in series), the LIB is penetrated to 50 % depth, namely, the first pouch cell. We discover that the unpenetrated pouch cell remains at 0.58 V and is structurally intact. Compared with the natural convection conditions, the LIB peak temperature is decreased by 141.3 °C. The gas generation reactions are significantly mitigated. Furthermore, the heat and gas generation are gradually decreased with a reduction in state of charge (SOC). More importantly, after penetrating the first LIB in the LIB pack, we observe that the maximum temperature of the neighboring LIB is around 49 °C. The study provides a first step towards LIB thermal safety protection projects. © 2025 Elsevier Ltd

关键词： Lithium-ion batteries

来源：评论

学校读者我要写书评

暂无评论

Solid-state anaerobic co-digestion of highland barley straw, food waste, and yak manure:Co-digestion performances and microbial characteristics analysis

引用

Renewable Energy 2025年 252卷

作者： Bao, Rui Feng, Jiaqi Feng, Wenli Li, Xiujin Lu, Xuebin Zuo, Xiaoyu Liu, Rufei Yuan, Hairong State Key Laboratory of Chemical Resource Engineering Department of Environmental Science and Engineering Beijing University of Chemical Technology Beijing100029 China Key Laboratory of Thermo-Fluid Science and Engineering of MOE School of Energy and Power Engineering Xi'an Jiaotong University 28 Xianning West Road Shanxi Province Xi'an710049 China State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power Engineering Xi'an Jiaotong University 28 Xianning West Road Shaanxi Province Xi'an710049 China Key Laboratory of Environmental Engineering and Pollution Control on the Plateau of Tibet Autonomous Region School of Ecology and Environment Tibet University Lhasa Tibet 850000 China School of Environmental·Science and Engineering Tianjin University Tianjin300350 China CUCDE Environmental Technology CO. LTD. Beijing100120 China

Co-digestion performances and microbial characteristics were investigated at solid-state anaerobic co-digestion system for highland barley straw (HBS), food waste (FW) and yak manure (YM). The different mixing ratios of HBS, FW, and YM were set according to the total solid content of different substrates. The results showed that the highest methane was 465.9 mL/g VS when the ratio of HBS:FW:YM was 0:5:1(HFY051), which was 4.5 %–102.6 % higher than those of co-digestion groups, HBS, and YM. The synergistic effect of co-digestion for different substrates contributed 6.3 %–123.1 % to improving methane yields in the first 25 days. Clostridium_sensu_stricto 1 and Fastidiosipila were the key bacterials and Methanosarcina and Methanobacterium were dominant methanogens at genus levels for different experimental groups. LEfSe indicated that 26 species have a great impact on co-digestion experimental groups. Therefore, solid-state anaerobic co-digestion of HBS, FW, and YM could improve the co-digestion performances and achieve higher methane yield. © 2025

关键词： Clostridium

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to ‘Performance analysis of sCO 2 tube with high non-uniform heat flux: Thermal-fluid-structural evaluation and optimization’ [Volume 231, August 2023, 120849]

引用

Applied Thermal engineering 2023年 235卷

作者： Shuo Gao Yanjuan Wang Yi Li Qibin Liu Jinliang Xu The Beijing Key Laboratory of Multiphase Flow and Heat Transfer North China Electric Power University Beijing 102206 China Institute of Engineering Thermophysics Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sciences Beijing 10049 China

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：