Ramesh K. Agarwal
Professor of Washington University in St. Louis, USA
Title报告题目: Influence of Turbulence Models in Numerical Simulation of Incipient and Deep Rotating Stall Characteristics in a Mixed-Flow Pump
Abstract内容摘要: Rotating stall is an unstable phenomenon, which has an important influence on the performance of a mixed-flow pump. In this paper, the internal flow characteristics and the energy performance of a mixed-flow pump in incipientand deep stall condition are numerically simulated using three turbulence models, namely the standard k-ε, k-ω and SSTk-ωturbulence model. The numerical results are analyzed and compared with the experimental results from an energy performance test and Particle Image Velocimetry (PIV). The analysis of the results shows that the turbulence models have significant influence on predicting the stall characteristics. The hump zone calculated by the SST k-ωturbulence model is more prominent than that obtained by using the k-εand k-ω models; however the flow rate condition at the lowest point of the hump zone has little difference in the results from various turbulence models. The simulations with SSTk-ωmodel can better capture the backflow in the end wall regionand separated flow and stall vortex in the mixed-flow pump compared to the other two models, and the SSTk-ωmodel has better prediction ability for the uneven spatial distribution of the low pressure area and the change of pressure gradient due to initial stall. Furthermore, the efficiency of the pump and stall flow field predicted by the SST k-ωmodelgives the best agreement with the experiment data.
Biography专家简介: Professor Ramesh K. Agarwal is the William Palm Professor of Engineering in the department of Mechanical Engineering and Materials Science at Washington University in St. Louis. From 1994 to 2001, he was the Sam Bloomfield Distinguished Professor and Executive Director of the National Institute for Aviation Research at Wichita State University in Kansas. From 1978 to 1994, he was the Program Director and McDonnell Douglas Fellow at McDonnell Douglas Research Laboratories in St. Louis. Dr. Agarwal received Ph.D in Aeronautical Sciences from Stanford University in 1975, M.S. in Aeronautical Engineering from the University of Minnesota in 1969 and B.S. in Mechanical Engineering from Indian Institute of Technology, Kharagpur, India in 1968. Over a period of 45 years, Professor Agarwal has worked in Computational Fluid Dynamics (CFD) and its application to fluid flow problems in mechanical & aerospace engineering and in energy and environmental applications. In past fifteen years, the focus of his research has been on pumps, compressors and turbomachinery and other fluid power applications. He is the author and coauthor of over 600 publications. He has given many plenary, keynote and invited lectures at various national and international conferences worldwide in over sixty countries. He is a Fellow of 24 professional societies including American Institute of Aeronautics and Astronautics (AIAA), American Society of Mechanical Engineers (ASME), Institute of Electrical and Electronics Engineers (IEEE), Society of Automotive Engineers (SAE), American Association for Advancement of Science (AAAS), American Physical Society (APS), and U.K. Institute of Physics among others. He has received many prestigious honors and national/international awards from various professional societies and organizations for his research contributions including the AIAA Reeds Aeronautics Award, SAE Medal of Honor, ASME Honorary Membership and Honorary Fellowship from Royal Aeronautical Society.
Josep M. Guerrero
Professor of Aalborg University, Denmark
Title报告题目: Living Microgrids – Energy flowing from inside out
Abstract内容摘要: This talk is about the microgrid concept, so how can we produce, store and consume energy locally and the relationship with our life philosophies concern that to change outside world, we need to change from inside out. The talk give some examples of how these technologies are impacting our daily lives with solar PV in our rooftops, electrical vehicles in our garages and home energy storage systems. The way we are also conceiving energy generation outside, in the big grid, is now taking many ideas from the microgrid concept, and more than ever, grid forming concepts are starting to be proposed in large PV and windfarms – some examples of projects will be explained. The same way, many examples and technologies for smart homes will be shown, integrating the microgrid technology in our daily lives all together IoT electronic devices, wearables and e-health systems, including smart devices to practice mindfulness.
Biography专家简介: Josep M. Guerrero received the B.S. degree in telecommunications engineering, the M.S. degree in electronics engineering, and the Ph.D. degree in power electronics from the Technical University of Catalonia, Barcelona, in 1997, 2000 and 2003, respectively. Since 2011, he has been a Full Professor with the Department of Energy Technology, Aalborg University, Denmark, where he is responsible for the Microgrid Research Program. From 2014 he is chair Professor in Shandong University; from 2015 he is a distinguished guest Professor in Hunan University; and from 2016 he is a visiting professor fellow at Aston University, UK, and a guest Professor at the Nanjing University of Posts and Telecommunications. From 2019, he became a Villum Investigator by The Villum Fonden, which supports the Center for Research on Microgrids (CROM) at Aalborg University, being Prof. Guerrero the founder and Director of the same centre (www.crom.et.aau.dk). His research interests is oriented to different microgrid aspects, including power electronics, distributed energy-storage systems, hierarchical and cooperative control, energy management systems, smart metering and the internet of things for AC/DC microgrid clusters and islanded minigrids. Specially focused on microgrid technologies applied to offshore wind, maritime microgrids for electrical ships, vessels, ferries and seaports, and space microgrids applied to nanosatellites and spacecrafts. Prof. Guerrero is an Associate Editor for a numberof IEEE TRANSACTIONS. He has published more than 600 journal papers in the fields of microgrids and renewable energy systems, which are cited more than 50,000 times. He received the best paper award of the IEEE Transactions on Energy Conversion for the period 2014-2015, and the best paper prize of IEEE-PES in 2015.As well, he received the best paper award of the Journal of Power Electronics in 2016. During seven consecutive years, from 2014 to 2020,he was awarded by Clarivate Analytics (former Thomson Reuters)as Highly Cited Researcher with 50 highly cited papers. In 2015 he was elevated as IEEE Fellow for his contributions on “distributed power systems and microgrids.”
Professor of Beijing University of Aeronautics and Astronautics, China
Title报告题目：A novel electromagnetic machine for the flight control of aircrafts
Abstract内容摘要:More-electric or all-electric aircraft can offer the advantages high reliability, high efficiency and high dynamic response. It is one major development direction for aircrafts. Electromagnetic machine is one important component for the flight control of more-electric or all-electric aircrafts. However, one major challenge of electromagnetic machine for the application of aircrafts is how to improve its output performancewhile maintaining its volume or mass. In this speech, we will introduceour recent work on the solution for this problem.
Biography专家简介: Liang YAN obtained his Ph.D degree from Nanyang Technological University, Singapore. He is currently with Beijing University of Aeronautics and Astronautics as a professor. His research interests are mainly on high-performance actuation technology and its applications. He has assumed research projects from National Science Foundation of China, National High Technology Research and Development Program of China (863 Program), National Key Research and Development Program, and etc. He has published more than 200 papers in top journals and recognized conferences, and obtained several research awards and best conference papers/finalists. He is the Technical Committee Member of Robotics and Mechatronics Organization, International Federation for the Promotion of Mechanism and Machine Science (IFToMM), and Electrical Machines Organization of the IEEE Industrial Electronics Society Committee. He was on the committee board of a number of IEEE/ASME conferences.
Professor of ETH Zurich, Switzerland
Title报告题目: Microrobotics and Nanomedicine: Future Directions in Medical Robotics
Abstract内容摘要: While the futuristic vision of micro and nanorobotics is of intelligent machines that navigate throughout our bodies searching for and destroying disease, we have a long way to go to get there. Progress is being made, though, and the past decade has seen impressive advances in the fabrication, powering, and control of tiny motile devices. Much of our work focuses on creating systems for controlling micro and nanorobots as well as pursuing applications of these devices. As systems such as these enter clinical trials, and as commercial applications of this new technology are realized, radically new therapies and uses will result that have yet to be envisioned.
Biography专家简介: Brad Nelson has been the Professor of Robotics and Intelligent Systems at ETH Zürich since 2002. He has over thirty-five years of experience in the field of robotics and has received a number of awards in the fields of robotics, nanotechnology, and biomedicine. He serves on the advisory boards of a number of academic departments and research institutes across North America, Europe, and Asia and is on the editorial boards of several academic journals. Prof. Nelson is the Department Head of Mechanical and Process Engineering at ETH and has been the Chairman of the ETH Electron Microscopy Center and a member of the Research Council of the Swiss National Science Foundation. He also serves on boards of three Swiss companies and is a member of the Swiss Academy of Engineering (SATW). Before moving to Europe, Prof. Nelson worked as an engineer at Honeywell and Motorola and served as a United States Peace Corps Volunteer in Botswana, Africa. He has also been a professor at the University of Minnesota and the University of Illinois at Chicago.
Professor of Taiyuan University of Technology, China
Professor of University of Huddersfield, UK
Title报告题目：Modelling and characterising the vibroacoutic responses of hydrodynamic lubrications for machinery condition monitoring
Abstract内容摘要：Real-time assessing lubrication performance is a crucial element in the efficiency and life-expectancy of any rotating equipment. This presentation overview latest progression on modelling, characterising, sensing and processing vibro-acoustics in hydrodynamic lubrication processes. It will pave ways to use accelerometers and acoustics emission sensors to achieve a cost –effective real-time monitoring of fluid lubricated various components including mechanical seals, bearings, gears, engines and so on.
Biography专家简介：Dr Fengshou Gu isa professor in diagnostic engineering, working as the Head of Measurement and Data Analytics Research Group (MDARG) and the Deputy Director of the Centre for Efficiency and Performance Engineering (CEPE), at the University of Huddersfield. He had his BSc and MSc from Taiyuan University of Technology, China and PhD from University of Manchester, UK. He is an expert in the field of machinery performance diagnostics/prognostics with over 30 years of research experience. To improve operational efficiency and reliability of different machines, he has worked in multiple disciplines including electrical, mechanical and thermal dynamics, vibration, acoustics and tribology for modelling, advanced measurements, signal processing and information optimization. He is the author of over 400 technical and professional publications and supervised over 100 PhD students. He has undertaken vibro-acoustic research projects of turbine machines, electric motors, internal combustion engines, reciprocating compressors, centrifugal pumps, hydraulic power systems, gearboxes and bearings, supported by industries and fund bodies. Recent research interests are focusing on tribo-dynamics, airborne acoustic remote measurements, wireless sensor networks, energy harvesting, and online-modal identification for accurate monitoring and prognostics of rotating machines and in-process quality monitoring.
Professor of Chongqing University of Technology, China
Biography专家简介：刘小康，博士，二级教授，“百千万人才工程”国家级人选、国家有突出贡献中青年专家、国务院政府特殊津贴专家，入选“教育部新世纪优秀人才支持计划”。现任重庆理工大学机械检测技术与装备教育部工程研究中心主任、兼机械工程学院副院长，重庆理工大学学术委员会委员，北京理工大学博士生导师。主要研究方向为机械量精密测量、智能仪器、微纳传感理论与技术。近5年主持国家自然科学基金重点项目2项，在IEEE Transactions on Industrial Electronics、Nanoscale和Mechanical Systems and Signal Processing等期刊上发表SCI论文20余篇，以第一发明人在纳米技术发达的美国、德国和日本获得了5项国际PCT发明专利。研究成果获得国家技术发明二等奖、中国专利金奖和重庆市技术发明一等奖等。