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Low Drag Automotive Mirror Using Passive Flow Jet Control
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Book Synopsis Low Drag Automotive Mirror Using Passive Flow Jet Control by : Greg Woyczynski
Download or read book Low Drag Automotive Mirror Using Passive Flow Jet Control written by Greg Woyczynski and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presented in this thesis includes a detailed study of passive jet flow control as applied to an automotive side-view mirror. Numerical analysis as well as experimental prototype tests are conducted on three models of mirrors: one baseline model and two others with variable jet strength. An open inlet draws a certain amount of flow, passes it through a converging duct, and exhausts the flow as a jet with an angle toward the center of the mirror. The jet forms a boat-tail effect that entrains high energy flow from the free stream to the base area, increasing the base pressure, and reducing the base drag. Throughout this thesis, drag reduction compared to the conventional automotive mirror is proven and detailed through computational fluid dynamics (CFD) simulation validated with wind tunnel experiments. The CFD algorithm employed is high order large eddy simulation (LES) and the code is produced by the CFD research group at the University of Miami. The jet 1 model has an inlet area that is 10% of the base area and is shown to have a drag decrease of 29.41% in CFD. In the jet 2 model, which has a four times larger inlet, we see a 40.91% drag decrease in CFD. This drag decrease is primarily due to wake reduction. The jet is observed as pulsing into the base area. The jet pulsation on the mid vertical and horizontal plane has a phase lag. The pulsing jet introduces coherent structures that enhance the entrainment of the main flow to the base area. An interesting phenomenon is observed that the jet generates negative entropy, which means the jet is energized by the free stream. The passive flow control is thus similar to an active jet flow control in this way. The mechanism of the negative entropy is not fully understood yet at this stage; more study are needed. The following are some task that warrant investigation: LES with refined grid to resolve the wake better in order to match the experimental PIV measurements, study the effect of different jet flow angle, study the inlet and outlet ratio effect on the mixing and entrainment, and scaling for the drag reduction with the geometric parameters.
Download or read book Electric and Hybrid Vehicles written by and published by SAE International. This book was released on 1995 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research and Technology Program Digest by : United States. National Aeronautics and Space Administration
Download or read book Research and Technology Program Digest written by United States. National Aeronautics and Space Administration and published by . This book was released on with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research and Technology Program Digest Flash Index by :
Download or read book Research and Technology Program Digest Flash Index written by and published by . This book was released on 1967 with total page 794 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aerodynamics of Road Vehicles by : Wolf-Heinrich Hucho
Download or read book Aerodynamics of Road Vehicles written by Wolf-Heinrich Hucho and published by Elsevier. This book was released on 2013-10-22 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerodynamics of Road Vehicles details the aerodynamics of passenger cars, commercial vehicles, sports cars, and race cars; their external flow field; as well as their internal flow field. The book, after giving an introduction to automobile aerodynamics and some fundamentals of fluid mechanics, covers topics such as the performance and aerodynamics of different kinds of vehicles, as well as test techniques for their aerodynamics. The book also covers other concepts related to automobiles such as cooling systems and ventilations for vehicles. The text is recommended for mechanical engineers and phycisists in the automobile industry who would like to understand more about aerodynamics of motor vehicles and its importance on the field of road safety and automobile production.
Book Synopsis Vortex Methods by : Georges-Henri Cottet
Download or read book Vortex Methods written by Georges-Henri Cottet and published by Cambridge University Press. This book was released on 2008-04-24 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vortex methods have matured in recent years, offering an interesting alternative to finite difference and spectral methods for high resolution numerical solutions of the Navier Stokes equations. In the past three decades, research into the numerical analysis aspects of vortex methods has provided a solid mathematical background for understanding the accuracy and stability of the method. At the same time vortex methods retain their appealing physical character, which was the motivation for their introduction. This book presents and analyzes vortex methods as a tool for the direct numerical simulation of impressible viscous flows. It will interest graduate students and researchers in numerical analysis and fluid mechanics and also serve as an ideal textbook for courses in fluid dynamics.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains by : Rose McCallen
Download or read book The Aerodynamics of Heavy Vehicles: Trucks, Buses, and Trains written by Rose McCallen and published by Springer Science & Business Media. This book was released on 2004-09 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book includes the carefully edited contributions to the United Engineering Foundation Conference: The Aerodynamics of Heavy Vehicles: Trucks, Buses and Trains held in Monterey, California from December 2-6, 2002. This conference brought together 90 leading engineering researchers discussing the aerodynamic drag of heavy vehicles. The book topics include a comparison of computational fluid dynamics calculations using both steady and unsteady Reynolds-averaged Navier-Stokes, large-eddy simulation, and hybrid turbulence models and experimental data obtained from wind tunnel experiments. Advanced experimental techniques including three-dimensional particle image velocimetry are presented as well, along with their use in evaluating drag reduction devices.
Download or read book Backpacker written by and published by . This book was released on 2001-03 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Backpacker brings the outdoors straight to the reader's doorstep, inspiring and enabling them to go more places and enjoy nature more often. The authority on active adventure, Backpacker is the world's first GPS-enabled magazine, and the only magazine whose editors personally test the hiking trails, camping gear, and survival tips they publish. Backpacker's Editors' Choice Awards, an industry honor recognizing design, feature and product innovation, has become the gold standard against which all other outdoor-industry awards are measured.
Book Synopsis Catalog of Government Inventions Available for Licensing by :
Download or read book Catalog of Government Inventions Available for Licensing written by and published by . This book was released on 1987 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in DNS/LES by : Chaoqun Liu
Download or read book Advances in DNS/LES written by Chaoqun Liu and published by . This book was released on 1997 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aerodynamic Drag Mechanisms of Bluff Bodies and Road Vehicles by : Gino Sovran
Download or read book Aerodynamic Drag Mechanisms of Bluff Bodies and Road Vehicles written by Gino Sovran and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: These Proceedings contain the papers and oral discussions presented at the Symposium on AERODYNAMIC DRAG MECHANISMS of Bluff Bodies and Road Vehides held at the General Motors Research Laboratories in Warren, Michigan, on September 27 and 28, 1976. This international, invitational Symposium was the twentieth in an annual series, each one having been in a different technical discipline. The Symposia provide a forum for areas of science and technology that are of timely interest to the Research Laboratories as weIl as the technical community at large, and in which personnel of the Laboratories are actively involved. The Symposia furnish an opportunity for the exchange of ideas and current knowledge between participating research specialists from educational, industrial arid governmental institutions and serve to stimulate future research activity. The present world-wide energy situation makes it highly desirable to reduce the force required to move road vehicles through the atmosphere. A significant amount of the total energy consumed for transportation is expended in overcoming the aerodynamic resistance to motion of these vehicles. Reductions in this aerodynamic drag can therefore have a large impact on ground transportation energy requirements. Although aerodynamic development work on road vehides has been performed for many years, it has not been widely reported or accompanied by much basic research.
Book Synopsis OAR Cumulative Index of Research Results by : United States. Air Force. Office of Aerospace Research
Download or read book OAR Cumulative Index of Research Results written by United States. Air Force. Office of Aerospace Research and published by . This book was released on 1963 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis OAR Cumulative Index of Research Results by :
Download or read book OAR Cumulative Index of Research Results written by and published by . This book was released on with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis OAR Quarterly Index of Current Research Results by : United States. Air Force. Office of Aerospace Research
Download or read book OAR Quarterly Index of Current Research Results written by United States. Air Force. Office of Aerospace Research and published by . This book was released on 1963 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Green Electronics/Green Bottom Line by : Lee H Goldberg
Download or read book Green Electronics/Green Bottom Line written by Lee H Goldberg and published by Elsevier. This book was released on 1999-11-05 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmentally safe engineering is one of the hottest and most controversial topics in technical circles. Though many publications offer theory and intellectual discussion of the topic, this book provides practical, hands-on advice including hints and tips from the nation's top engineers. Green Electronics/Green Bottom Line offers practical advice for engineers and managers who want or need to incorporate environmental issues into the design process. The emerging discipline of Design for the Environment (DfE) combines engineering know-how with environmental awareness. Topics include international policy issues such as ISO 14000, materials selection (e.g., for recyclability), manufacturing concerns like no-flux processes, and design issues such as power consumption. Real-world cases show how these elements can be included in everyday designs. Each chapter opens with a topical cartoon and lively story, interview or editorial. The discussion will then move to specific engineering issues and their economic and social context. The last section explores larger possibilities and new directions still to be explored by engineers concerned with education, health, and environmental quality. Contributors include engineers from Motorola, Analog Devices, Dupont, Compaq, Nortel, AMD, and Apple Computer, and academics from universities in the US, Canada, the UK, and Europe, as well as the Rocky Mountain Institute. - An everyday guide to environmentally sound electronics design - Contributors include top engineers from the biggest electronics manufacturers and most prestigious universities - Real-world cases illustrate topics giving concepts the reader can apply immediately
