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Author: Vincent Boucinha
Publisher: Omniscriptum
ISBN: 9786131533303
Category :
Languages : fr
Pages : 336
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Book Description
D'ici à l'horizon 2020, la contribution potentielle de l'aérodynamique à la réduction de la consommation, et par suite aux émissions polluantes, se situe entre 15 et 20%, aussi bien pour l'aéronautique que pour l'automobile. Pour y parvenir, le contrôle actif représente une solution en rupture par rapport à l'utilisation de dispositifs passifs classiques tels que les ailerons. Les travaux présentés dans ce livre font partie d'une nouvelle voie de recherche qui exploite les propriétés cinétiques des décharges plasmas pour modifier les performances aérodynamiques. Cette étude constitue la première application des actionneurs plasmas pour modifier l'écoulement autour d'une géométrie simplifiée de véhicule automobile. Les actionneurs utilisés reposent sur des décharges à barrière diélectrique surfacique avec un diélectrique souple. Ils sont d'abord étudiés dans l'air au repos puis leur efficacité est testée en soufflerie pour trois configurations aérodynamiques de complexité croissante. Des résultats significatifs tant sur le plan de la modification de la topologie de l'écoulement que de l'amélioration des efforts aérodynamiques sont obtenus pour des vitesses jusqu'à 35 m/s.
Author: Vincent Boucinha
Publisher: Omniscriptum
ISBN: 9786131533303
Category :
Languages : fr
Pages : 336
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Book Description
D'ici à l'horizon 2020, la contribution potentielle de l'aérodynamique à la réduction de la consommation, et par suite aux émissions polluantes, se situe entre 15 et 20%, aussi bien pour l'aéronautique que pour l'automobile. Pour y parvenir, le contrôle actif représente une solution en rupture par rapport à l'utilisation de dispositifs passifs classiques tels que les ailerons. Les travaux présentés dans ce livre font partie d'une nouvelle voie de recherche qui exploite les propriétés cinétiques des décharges plasmas pour modifier les performances aérodynamiques. Cette étude constitue la première application des actionneurs plasmas pour modifier l'écoulement autour d'une géométrie simplifiée de véhicule automobile. Les actionneurs utilisés reposent sur des décharges à barrière diélectrique surfacique avec un diélectrique souple. Ils sont d'abord étudiés dans l'air au repos puis leur efficacité est testée en soufflerie pour trois configurations aérodynamiques de complexité croissante. Des résultats significatifs tant sur le plan de la modification de la topologie de l'écoulement que de l'amélioration des efforts aérodynamiques sont obtenus pour des vitesses jusqu'à 35 m/s.
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 568
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Book Description
Author: B. K. VENKANNA
Publisher: PHI Learning Pvt. Ltd.
ISBN: 8120340310
Category : Heat
Languages : en
Pages : 506
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Book Description
"This comprehensive text on the basics of heat and mass transfer provides a well-balanced treatment of theory and mathematical and empirical methods used for solving a variety of engineering problems. The book helps students develop an intuitive and practical under-standing of the processes by emphasizing the underlying physical phenomena involved. Focusing on the requirement to clearly explain the essential fundamentals and impart the art of problem-solving, the text is written to meet the needs of undergraduate students in mechanical engineering, production engineering, industrial engineering, auto-mobile engineering, aeronautical engineering, chemical engineering, and biotechnology.
Author: Brereton Greenhous
Publisher: Canadian Government Publishing
ISBN:
Category : Biography & Autobiography
Languages : en
Pages : 422
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Book Description
Personal stories from the Great War of 1914-1918.
Author: Amir S. Gohardani
Publisher: Nova Science Publishers
ISBN: 9781629485881
Category : Airplanes
Languages : en
Pages : 0
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Book Description
Distributed propulsion technology is one of the revolutionary candidates for future aircraft propulsion. In this book, which serves as the very first reference book on distributed propulsion technology, the potential role of distributed propulsion technology in future aviation is investigated. Following a historical journey that revisits distributed propulsion technology in unmanned air vehicles, commercial aircrafts, and military aircrafts, features of this specific technology are highlighted in synergy with an electric aircraft concept and a first-of-its-kind comparison between commercial and military aircrafts employing distributed propulsion arrangements. In light of propulsionairframe integration and complementary technologies, such as boundary layer ingestion, thrust vectoring and circulation control, transpired opportunities and challenges are addressed in addition to a number of identified research directions proposed for future aircrafts. Moreover, a diverse set of distributed propulsion arrangements are considered. These include: small engines, gas-driven multi-fan architectures, turboelectric systems featuring superconductive and non-superconducting electrical machine technology, and electromagnetic fans. This book features contributions by the National Aeronautics and Space Administration (NASA) and the United States Air Force (USAF), and includes the first proposed official definition for distributed propulsion technology in subsonic fixed wing aircrafts.
Author: Jean Michel Martin
Publisher: John Wiley & Sons
ISBN: 0470987707
Category : Science
Languages : en
Pages : 246
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Book Description
The technology involved in lubrication by nanoparticles is a rapidly developing scientific area and one that has been watched with interest for the past ten years. Nanolubrication offers a solution to many problems associated with traditional lubricants that contain sulphur and phosphorus; and though for some time the production of nanoparticles was restricted by the technologies available, today synthesis methods have been improved to such a level that it is possible to produce large quantities relatively cheaply and efficiently. Nanolubricants develops a new concept of lubrication, based on these nanoparticles, and along with the authors’ own research it synthesises the information available on the topic of nanolubrication from existing literature and presents it in a concise form. Describes the many advantages and potential applications of nanotechnology in the tribological field. Offers a full review of the state-of-the-art as well as much original research that is yet unpublished. Includes sections on boundary lubrication by colloïdal systems, nanolubricants made of metal dichalcogenides, carbon-based nanolubricants, overbased detergent salts, nanolubricants made of metals and boron-based solid nanolubricants and lubrication additives. Authored by highly regarded experts in the field with contributions from leading international academics. Nanolubricants will appeal to postgraduate students, academics and researchers in mechanical engineering, chemical engineering and materials science. It should also be of interest to practising engineers with petroleum companies and mechanical manufacturers.
Author:
Publisher:
ISBN:
Category : Energy conservation
Languages : en
Pages : 128
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Book Description
Author: IEEE Staff
Publisher:
ISBN: 9781479904617
Category :
Languages : en
Pages :
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Book Description
Author:
Publisher:
ISBN:
Category : Aircraft gas-turbines
Languages : en
Pages : 486
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Book Description
The symposium dealt with design approaches for military aircraft propulsion systems to provide enhanced operational flexibility, longer range, better fuel efficiency and improved affordability. All classes of gas turbines were addressed in nine sessions as follows: Engine Design and Analysis (Part 1) (5 papers); Mechanical Systems (6 papers); Controls (4 papers); Combustors/Augmentors (4 papers); Compressor Systems (Part I) (5 papers); Compressor Systems (Part II) (3 papers); Turbines (Part I) (5 papers); Turbines (Part II) (4 papers); Engine Design and Analysis (Part II) (4 papers) These proceedings also include a Technical Evaluation Report and a Keynote address published in French and English.
Author: Ronald K Jurgen
Publisher: SAE International
ISBN: 0768057191
Category : Technology & Engineering
Languages : en
Pages : 147
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Book Description
With production and planning for new electric vehicles gaining momentum worldwide, this book – the third in a series of five volumes on this subject – provides engineers and researchers with perspectives on the most current and innovative developments regarding electric and hybrid-electric vehicle technology, design considerations, and components. This book features 13 SAE technical papers, published from 2008 through 2010, that provide an overview of research on electric vehicle engines and powertrains. Topics include: Hybrid-electric vehicle transmissions and propulsion systems The development of a new 1.8-liter engine for hybrid vehicles Vehicle system control software validation The impact of hybrid-electric powertrains on chassis systems and vehicle dynamics High-torque density motors, and interior permanent magnet synchronous motors
