检索结果-南通市图书馆

Aerodynamics of a tandem-Bladed Axial Compressor Rotor under Circumferential Distortion at Different Rotational Speeds

引用

Journal of thermal Science 2024年第4期33卷 1340-1356页

作者： am.t kumar.jerry t.john A.M.PRADEEP R.A.DAKKERMANS Dragan KOZULOVIC Department of Aerospace Engineering Indian Institute of Technology BombayMumbai400076India Department of Automotive and Aeronautical Engineering Hamburg University of Applied Sciences20099HamburgGermany Institute of Jet Propulsion Bundeswehr University Munich85577NeubibergGermany

For most aircraft engines,inflow distortion is *** distortion is known to degrade the aerodynamic performance and stable operating limits of a *** rotor configuration is an arrangement that effectively controls the growth of the boundary layer over the suction surface of the ***,a higher total pressure rise can be achieved through this unconventional design approach involving the splitting of the blade into forward and aft *** is expected that the effect of inlet flow distortion would be more severe for a tandem-rotor design due to the greater flow turning inherent in such ***,this aspect needs to be thoroughly *** present study discusses the effect of circumferential distortion on the tandem-rotor at different rotational ***-annulus RANS simulations using ANSYS CFX are used in the present *** performance of the rotor at a particular flow coefficient and different rotational speeds is *** total pressure and efficiency are observed to drop at lower mass flow rates under the influence of circumferential *** loss region in each blade passage is mainly associated with the blade wake,tip leakage vortex,secondary flow,and boundary ***,their contribution varies from passage to passage,particularly in the distorted *** the lower span,the wake width is found to be higher than that at a higher *** to the redistribution of the mass flow,the circumferential extent reduces at a higher *** the undistorted sector,the strength of the tip leakage vortex is significantly higher at the design rotational speed than at lower *** distortion near the tip region promotes an early vortex breakdown even at the design operating *** adversely affects the total pressure,efficiency,and stall *** clean flow conditions,this phenomenon is only observed near the stall *** the design operating condition,the breakdown of the forward rotor tip l

关键词： tandem rotor circumferential distortion loss tip leakage vortex vortex breakdown diffusion factor aerodynamics of compressor blade

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Synthesis methods of functionalized nanoparticles:a review

引用

Bio-Design and Manufacturing 2021年第2期4卷 379-404页

作者： Niyou Wang jerry Ying Hsi Fuh S.thameem Dheen A.Senthil kumar Department of Mechanical Engineering National University of Singapore9 Engineering Drive 1#07-08 Block EASingapore 117575Singapore Department of Anatomy National University of Singapore4 Medical DriveMD10YLLSoMSingapore 117594Singapore

With the recent advancement in nanotechnology,nanoparticles(NPs)offer an ample variety of smart functions than conventional materials in various *** compared to larger particles,NPs possess unique characteristics and excellent abilities,such as low toxicity,chemical stability,surface functionality,and *** advantageous properties allow them to be widely utilized in many applications,including biomedical applications,energy applications,It applications,and industrial *** order to fulfill the increasing demands of NP applications,existing NP synthesis methods need to be improved based on the requirements of different applications to further their usage.A comprehensive understanding of the relationships between synthesis param.ters and properties of NPs can help us better fine-tune them with designed properties and minimal *** review paper will discuss the commonly used synthesis methods of functionalized NPs,as well as future directions and challenges to develop various synthesis methods further.

关键词： Nanoparticles Single synthesis methods Biosynthesis methods Combined synthesis methods Processing param.ters

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

the keystone-design perforator-based flap for leg defects: a synthesis of philosophies

引用

Plastic and Aesthetic Research 2014年第1期1卷 70-74页

作者： jerry R.john Jyoshid R.Balan Satyaswarup tripathy Ramesh kumar Sharma Chandan Jadhav Department of Plastic Surgery Post Graduate Institute of Medical Education and Research(PGIMER)Chandigarh 160012India Department of Plastic Surgery Sushruta Institute of Plastic SurgeryElite HospitalsThrissur 680007KeralaIndia.

Aim:the classical keystone-design flap,although elegantly employed for various trunk defects,has limited movement on the *** study aims to modify the keystone–design flaps for leg ***:A keystone-design flap,in which perforators are identified and dissected,is described specifically for elliptical defects overlying the ***:It retains the unique advantages of both the perforator island flap concept as well as the keystone-design ***:the technique as well as the possibilities of raising such flaps over various areas of the leg is outlined.

关键词： Flap keystone leg defect lower extremity reconstruction perforator island flap

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

含储能电池的并网光伏系统设计研究

含储能电池的并网光伏系统设计研究

引用

作者：吉瑞（jerry JEREMIAH kumar）华北电力大学(北京)

学位级别：硕士

随着全球经济社会的不断发展,能源消费也相应的持续增长。太阳能是当前利用新能源的重要方式之一,光伏并网发电技术将光伏发电系统直接与电网相连,并网光伏系统已经成为太阳能利用领域的主要形式。随着大规模光伏系统的并网发电,对电网... 详细信息

随着全球经济社会的不断发展,能源消费也相应的持续增长。太阳能是当前利用新能源的重要方式之一,光伏并网发电技术将光伏发电系统直接与电网相连,并网光伏系统已经成为太阳能利用领域的主要形式。随着大规模光伏系统的并网发电,对电网稳定性提出新的挑战,而与储能系统一体化的并网光伏系统成为应对大规模光伏发电并网及区域系统供电的解决方案,本文系统分析并设计了与储能电池相结合的并网光伏发电系统。典型的光伏发电系统包括太阳能电池板、逆变器、以及跟踪电力生产的性能监测控制系统。针对目前住宅型太阳能光伏系统调控能力不灵活的问题,本文设计了一种与备用电池存储能相结合的并网光伏系统,该系统由8kW太阳能阵列、600V MPPt充电控制器、7.6kW并网逆变器和600Ah电池组组成,电池组件可以按交流或直流模式与电网耦合。另外,通过对搭建的住宅型太阳能光伏系统的动态仿真验证了 MPPt充电控制器调控方式的可行性与灵活性。研究还发现铅酸电池、锂离子电池、钠硫和液流电池等可充电电池所组成的混合储能系统是迄今为止可再生能源的最佳选择,其中磷酸铁锂电池（LiFePO4）由于其低能量密度而适用于静态存储。通过对模型的调控方式与策略控制的可行性验证,我们获得了该家用光伏系统并网和离网的孤岛运行模式无缝切换。研究发现,运用备用电池存储能相结合的并网光伏系统,可以有效提升系统的稳定性并降低发电成本。

关键词：光伏系统储能电池锂离子电池控制策略

来源：

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Effects of Various Processing Param.ters on Mechanical Properties and Biocompatibility of Fe-based Bulk Metallic Glass Processed via Selective Laser Melting at Constant Energy Density

引用

Chinese Journal of Mechanical Engineering(Additive Manufacturing Frontiers) 2022年第3期1卷 49-57页

作者： Niyou Wang Shuai Chang Guiwei Li S thameem Dheen A Senthil kumar Wenzheng Wu Qingping Liu Ji Zhao Luquan Ren jerry Ying Hsi Fuh Department of Mechanical Engineering National University of SingaporeSingapore117575Singapore Department of Materials Science and Engineering National University of SingaporeSingapore117576Singapore State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin150001China School of Mechanical and Aerospace Engineering Jilin UniversityChangchun130025China Key Laboratory of Bionic Engineering Ministry of Education Jilin UniversityChangchun130025China Department of Anatomy National University of SingaporeSingapore117594Singapore

the unique properties of bulk metallic glass(BMG)render it an excellent material for bone-implant *** samples are difficult to produce directly because of the critical cooling rate of *** in additive manufacturing technologies,such as selective laser melting(SLM),have enabled the development of *** successful production of materials via SLM relies significantly on the processing param.ters;meanwhile,the overall energy density affects the crystallization and,thus,the final ***,to further determine the effects of the processing param.ters,SLM is performed in this study to print Fe-based BMG with different properties three dimensionally using selected processing param.ters but a constant energy *** printed amorphous Fe-based BMG outperforms the typical 316 L stainless steel(316 L SS)in terms of mechanical properties and corrosion ***,observations from nanoindentation tests indicate that the hardness and elastic modulus of the Fe-based BMG can be customized explicitly by adjusting the SLM processing *** cytotoxicity results show that the Fe-based BMG can enhance the viability of SAOS2 cells,as compared with 316 L *** intriguing results show that Fe-based BMG should be investigated further for orthopedic implant applications.

关键词： Bulk metallic glass Selective laser melting Processing param.ters Energy density Part characterization Biocompatibility

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

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

在线全文

在线全文

在线全文

在线全文

在线全文

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：