Aerodynamics Measurements

Author : G P Russo
Publisher : Elsevier
ISBN 13 : 085709386X
Total Pages : 283 pages
Book Rating : 4.68/5 ( download)

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Download or read book Aerodynamic Measurements written by G P Russo and published by Elsevier. This book was released on 2011-10-04 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aerodynamic measurements presents a comprehensive review of the theoretical bases on which experimental techniques used in aerodynamics are based. Limitations of each method in terms of accuracy, response time and complexity are addressed. This book serves as a guide to choosing the most pertinent technique for each type of flow field including: 1D, 2D, 3D, steady or unsteady, subsonic, supersonic or hypersonic. No book currently presents as many techniques as are presented in this volume. They are usually available in only a short course or in proprietary booklets Offers a critical review of the various methods of aerodynamic measurement and helps guide the reader to choose the most appropriate in each case Describes the evolution of specific techniques from old-fashioned mechanical processes to modern computerized versions aiding students and practitioners to understand results of their findings

Author : Franz Wilhelm Schmitz
Publisher :
ISBN 13 :
Total Pages : 218 pages
Book Rating : 4.30/5 ( download)

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Download or read book Aerodynamics of the Model Airplane: Airfoil measurements written by Franz Wilhelm Schmitz and published by . This book was released on 1967 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Robert C. Dean
Publisher :
ISBN 13 : 9780262040013
Total Pages : pages
Book Rating : 4.18/5 ( download)

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Download or read book Aerodynamics Measurements written by Robert C. Dean and published by . This book was released on 1953-06-15 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : C. J. Welsh
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.86/5 ( download)

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Download or read book Real-gas Effects on the Aerodynamics of Blunt Cones as Measured in a Hypervelocity Range written by C. J. Welsh and published by . This book was released on 1979 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Author : Petter Ekman
Publisher : Linköping University Electronic Press
ISBN 13 : 917929863X
Total Pages : 96 pages
Book Rating : 4.30/5 ( download)

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Download or read book Important Factors for Accurate Scale-Resolving Simulations of Automotive Aerodynamics written by Petter Ekman and published by Linköping University Electronic Press. This book was released on 2020-04-02 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Road transports are responsible for almost 18 % of the greenhouse gas emission in Europe and are today the leading cause of air pollution in cities. Aerodynamic resistance has a significant effect on fuel consumption and hence the emission of vehicles. For electric vehicles, emissions are not affected by the aerodynamics as such but instead have a significant effect on the effective range of the vehicle. In 2017, a new measurement procedure was introduced, Worldwide Harmonized Light Vehicles Test Procedure (WLTP), for measuring emissions, fuel consumption, and range. This procedure includes a new test cycle with increased average driving speed compared to the former procedure, which thereby increases the importance of the aerodynamic resistance, as it drastically increases with speed. A second effect is that the exact car configuration sold to the customer needs to be certified in terms of fuel consumption and emissions. The result is that every possible combination of optional extras, which might affect the aerodynamic resistance, needs to be aerodynamically analyzed and possibly improved. From 2021, the European Commission will introduce stricter emission regulations for new passenger cars, with the fleet-wide average lowered to 95 grams CO2=km, which puts an even higher demand on achieving efficient aerodynamics. Virtual development of the aerodynamics of road vehicles is today used to a great extent, using Computational Fluid Dynamics, as it enables faster and cheaper development. However, achieving high accuracy for the prediction of the flow field and aerodynamic forces is challenging, especially given the complexity of both the vehicle geometry in itself and the surrounding flow field. Even for a simplified generic bluff body, accurately predicting the flow field and aerodynamic forces is a challenge. The main reason for this challenge of achieving results with high accuracy is the prediction of the complex behavior of turbulence. Scale-resolving simulation (SRS) methods, such as Large Eddy Simulation (LES), where most of the turbulent structures are resolved has in many studies shown high accuracy but unfortunately to a very high computational cost. It is primarily the small turbulent structures within the near-wall region that requires a _ne resolution in both space (the mesh) and in time. This fine resolution is the reason for the very high computational cost and makes LES unfeasible for practical use in industrial aerodynamic development at present and in the near future. By modeling the turbulent structures within the near-wall region using a Reynolds-Averaged Navier-Stokes (RANS) model, and resolving the turbulence outside the region with a LES model, a coarser resolution is possible to use, resulting in significantly lower computational cost. Which used RANS model is of high importance, and especially how much turbulent viscosity the model generates, as too high values can result in suppression of the resolved turbulence. The transitioning between the RANS and LES regions have a significant effect on the results. Faster transition enables more resolved turbulence, favorable for higher accuracy, but needs to be balanced with sufficient shielding of the RANS region. If resolving the turbulence occurs within the near-wall region, and the mesh is not sufficiently fine, it can result in poor accuracy. By increasing the time-step size and disregarding best-practice guides, the computational cost can be significantly reduced. The accuracy is reasonably insensitive to the larger time step sizes until a certain degree, thereby enabling computationally cheaper SRS to achieve high accuracy of aerodynamic predictions needed to meet present and future emission regulations.

Author : Bernhard Stoevesandt
Publisher : Springer Nature
ISBN 13 : 3030313077
Total Pages : 1495 pages
Book Rating : 4.74/5 ( download)

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Download or read book Handbook of Wind Energy Aerodynamics written by Bernhard Stoevesandt and published by Springer Nature. This book was released on 2022-08-04 with total page 1495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This handbook provides both a comprehensive overview and deep insights on the state-of-the-art methods used in wind turbine aerodynamics, as well as their advantages and limits. The focus of this work is specifically on wind turbines, where the aerodynamics are different from that of other fields due to the turbulent wind fields they face and the resultant differences in structural requirements. It gives a complete picture of research in the field, taking into account the different approaches which are applied. This book would be useful to professionals, academics, researchers and students working in the field.

Author : Bruno Chanetz
Publisher : Springer Nature
ISBN 13 : 3030355624
Total Pages : 329 pages
Book Rating : 4.23/5 ( download)

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Download or read book Experimental Aerodynamics written by Bruno Chanetz and published by Springer Nature. This book was released on 2020-01-03 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents experimental techniques in the field of aerodynamics, a discipline that is essential in numerous areas, such as the design of aerial and ground vehicles and engines, the production of energy, and understanding the wind resistance of buildings. Aerodynamics is not only concerned with improving the performance and comfort of vehicles, but also with reducing their environmental impact. The book provides updated information on the experimental and technical methods used by aerodynamicists, engineers and researchers. It describes the various types of wind tunnels – from subsonic to hypersonic – as well as the problems posed by their design and operation. The book also focuses on metrology, which has allowed us to gain a detailed understanding of the local properties of flows, and examines current developments toward creating a methodology combining experiments and numerical simulations: the computer-assisted wind tunnel. Lastly, it offers an overview of experimental aerodynamics based on a prospective vision of the discipline, and discusses potential futures challenges. The book can be used as a textbook for graduate courses in aerodynamics, typically offered to students of aerospace and mechanical engineering programs, and as a learning tool for professionals and engineers in the fields of aerodynamics, aeronautics and astronautics automobile.

Author : John David Anderson
Publisher : Cambridge University Press
ISBN 13 : 9780521669559
Total Pages : 498 pages
Book Rating : 4.53/5 ( download)

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Download or read book A History of Aerodynamics written by John David Anderson and published by Cambridge University Press. This book was released on 1998 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the Foreword: 'John Anderson's book represents a milestone in aviation literature. For the first time aviation enthusiasts - both specialists and popular readers alike - possess an authoritative history of aerodynamic theory. Not only is this study authoritative, it is also highly readable and linked to the actual (and more familiar) story of how the airplane evolved. The book touches on all the major theorists and their contributions and, most important, the historical context in which they worked to move the science of aerodynamics forward.' Von Hardesty, Smithsonian Institution From the reviews: 'Something of the unexpected quality of this book can be inferred from its full title A History of Aerodynamics and Its Impact on Flying Machines. Pilots tend to suppose that the science of aerodynamics began empirically, somewhere around the time of Lilienthal and the Wrights, and that aerodynamics and manned flight are roughly coeval. It is therefore surprising to come upon a photograph of the Wright Flyer as late as page 242 of the 478-page volume.' Peter Garrison, Flying 'This book successfully straddles the boundary that separates a text book from a history book. It is of equal interest to both the aerodynamicist and the layman. The textual balance achieved by the author has resulted in a book that is enjoyable and educational.' Earl See, American Aviation Historical Society Newsletter

Author : Stefano Discetti
Publisher : CRC Press
ISBN 13 : 1498704026
Total Pages : 454 pages
Book Rating : 4.21/5 ( download)

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Download or read book Experimental Aerodynamics written by Stefano Discetti and published by CRC Press. This book was released on 2017-03-16 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental Aerodynamics provides an up to date study of this key area of aeronautical engineering. The field has undergone significant evolution with the development of 3D techniques, data processing methods, and the conjugation of simultaneous measurements of multiple quantities. Written for undergraduate and graduate students in Aerospace Engineering, the text features chapters by leading experts, with a consistent structure, level, and pedagogical approach. Fundamentals of measurements and recent research developments are introduced, supported by numerous examples, illustrations, and problems. The text will also be of interest to those studying mechanical systems, such as wind turbines.

Author : John D. Anderson, Jr
Publisher : Cambridge University Press
ISBN 13 : 1139935992
Total Pages : 498 pages
Book Rating : 4.99/5 ( download)

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Download or read book A History of Aerodynamics written by John D. Anderson, Jr and published by Cambridge University Press. This book was released on 1999-01-28 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the Foreword: 'John Anderson's book represents a milestone in aviation literature. For the first time aviation enthusiasts - both specialists and popular readers alike - possess an authoritative history of aerodynamic theory. Not only is this study authoritative, it is also highly readable and linked to the actual (and more familiar) story of how the airplane evolved. The book touches on all the major theorists and their contributions and, most important, the historical context in which they worked to move the science of aerodynamics forward.' Von Hardesty, Smithsonian Institution From the reviews: 'Something of the unexpected quality of this book can be inferred from its full title A History of Aerodynamics and Its Impact on Flying Machines. Pilots tend to suppose that the science of aerodynamics began empirically, somewhere around the time of Lilienthal and the Wrights, and that aerodynamics and manned flight are roughly coeval. It is therefore surprising to come upon a photograph of the Wright Flyer as late as page 242 of the 478-page volume.' Peter Garrison, Flying 'This book successfully straddles the boundary that separates a text book from a history book. It is of equal interest to both the aerodynamicist and the layman. The textual balance achieved by the author has resulted in a book that is enjoyable and educational.' Earl See, American Aviation Historical Society Newsletter