Ecoulement Autour Dune Helice Marine Probleme Inverse Et Probleme Direct

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ECOULEMENT AUTOUR D'UNE HELICE MARINE, PROBLEME INVERSE ET PROBLEME DIRECT

Author : NOUREDDINE.. SETTOU
Publisher :
ISBN 13 :
Total Pages : 135 pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis ECOULEMENT AUTOUR D'UNE HELICE MARINE, PROBLEME INVERSE ET PROBLEME DIRECT by : NOUREDDINE.. SETTOU

Download or read book ECOULEMENT AUTOUR D'UNE HELICE MARINE, PROBLEME INVERSE ET PROBLEME DIRECT written by NOUREDDINE.. SETTOU and published by . This book was released on 1993 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: IL EST BIEN CONNU QUE LE CALCUL DES PERFORMANCES ET LE CALCUL DE PROJET D'UNE HELICE NECESSITE LA PRISE EN COMPTE DE LA CONTRACTION ET DE L'ETIREMENT NON HOMOGENE DU PAS DU SILLAGE TOURBILLONNAIRE HELICOIDAL. POUR UNE HELICE DESTINEE A FONCTIONNER DANS LE SILLAGE D'UN CORPS AXISYMETRIQUE CE SILLAGE EST SCHEMATISE PAR UNE REPARTITION DES TOURBILLONS TORIQUES, SOUS L'ACTION DE L'HELICE ET DU MOYEU, LA CONTRACTION DE CES TOURBILLONS TORIQUES A AUSSI UNE INFLUENCE DONT IL FAUT EN TENIR COMPTE DANS LE CALCUL. L'ETUDE QUE NOUS MENONS EST EFFECTUEE EN DEUX ETAPES. EN PREMIERE ETAPE, ON ETALE LES TOURBILLONS LIES ET LIBRES QUE LES PALES DE L'HELICE DOIVENT ENGENDRER D'UNE MANIERE HOMOGENE SUIVANT LE SENS AZIMUTAL, L'ECOULEMENT DEVENANT AXISYMETRIQUE PEUT ETRE TRAITE DANS LE PLAN MERIDIEN. CE CALCUL PERMET DE DETERMINER LA CONTRACTION ET L'ETIREMENT DU SILLAGE DES TOURBILLONS LIBRES TOUT EN PRENANT EN COMPTE LES TOURBILLONS TORIQUES SCHEMATISANT LE SILLAGE DU CORPS AXISYMETRIQUE QUI PRECEDE L'HELICE. IL DETERMINE EN PREMIERE APPROXIMATION LA REPARTITION DE PRESSION SUR LES PALES, ET LA GEOMETRIE DES PALES S'IL S'AGIT DU PROBLEME INVERSE. DANS CETTE ETAPE, LE CHAMP EST CARACTERISE PAR LA FONCTION DE COURANT DONT LA DETERMINATION EST LIEE A LA REPARTITION DE LA COMPOSANTE AZIMUTALE DU ROTATIONNEL. CETTE REPARTITION EST REGIE PAR L'EQUATION DU MOUVEMENT. EN SECONDE ETAPE, ON REVIENT AU NOMBRE DE PALES FINI. ON DECOMPOSE L'ECOULEMENT EN DEUX PARTIES: LA PREMIERE REPRESENTE L'ECOULEMENT ROTATIONNEL PROVENANT DU SILLAGE D'AMONT SOUMIS A L'INFLUENCE DE L'HELICE ET DE SON MOYEU, ELLE EST DEDUITE D'UN CALCUL AXISYMETRIQUE; LA SECONDE PARTIE IRROTATIONNELLE REPRESENTE LE CHAMP INDUIT PAR L'ENSEMBLE DES TOURBILLONS LIES ET LIBRES QUI SCHEMATISENT LES PALES ET LE SILLAGE TOURBILLONNAIRE. LE POSITIONNEMENT DE CES TOURBILLONS LIBRES EST OBTENU GRACE AU RESULTAT DU CALCUL DE LA 1ERE ETAPE. CE CHAMP 3D EST TRAITE MOYENNANT LA METHODE DE SINGULARITES EN IMPOSANT LA CONDITION DE GLISSEMENT SUR LES PALES POUR LE PROBLEME DIRECT ET LA CONDITION SUR LA CIRCULATION ET LA CONSERVATION DU FLUX TRAVERSANT LES FACETTES ASSOCIEES SUR LES DEUX FACES DE LA PALE POUR LE PROBLEME INVERSE, TOUT EN PRENANT EN COMPTE DES EFFETS INDUITS PAR LA PARTIE ROTATIONNELLE CONSTITUANT L'ECOULEMENT BIEN ENTENDU. CE CALCUL PERMET DE DETERMINER LA REPARTITION DEFINITIVE DE LA PRESSION SUR LES PALES ET LA GEOMETRIE FINALE DES PALES POUR LE PROBLEME INVERSE

PROBLEME INVERSE ET DIRECT D'UNE HELICE MARINE CARENEE PAR UNE METHODE COUPLEE S2 AXI-SYMETRIQUE 3D-SINGULARITES

Author : VINCENT.. LIU
Publisher :
ISBN 13 :
Total Pages : 179 pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis PROBLEME INVERSE ET DIRECT D'UNE HELICE MARINE CARENEE PAR UNE METHODE COUPLEE S2 AXI-SYMETRIQUE 3D-SINGULARITES by : VINCENT.. LIU

Download or read book PROBLEME INVERSE ET DIRECT D'UNE HELICE MARINE CARENEE PAR UNE METHODE COUPLEE S2 AXI-SYMETRIQUE 3D-SINGULARITES written by VINCENT.. LIU and published by . This book was released on 1999 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: UN PROCESSUS D'OPTIMISATION POUR L'HELICE MARINE CARENEE DOIT ETRE CAPABLE DE PRENDRE EN COMPTE LES ECHAPPEMENTS TOURBILLONNAIRES LACHES PAR LES AUBES DU ROTOR ET DU STATOR AINSI QUE CELLES DE LA CARENE. LE PROBLEME INVERSE, AVEC L'HYPOTHESE DE FLUIDE PARFAIT, EST BASE SUR LA THEORIE TOURBILLONNAIRE. CETTE APPROCHE PERMET D'INTRODUIRE LE MOMENT CINETIQUE AINSI QUE LA LOI D'EPAISSEUR DES AUBES COMME DONNEES INITIALES AFIN DE RESPECTER RESPECTIVEMENT LES ECHANGES ENERGETIQUES ENTRE LE FLUIDE ET LA MACHINE ET LES CONTRAINTES DE STRUCTURE. UNE FONCTION DE CHARGE PRENANT EN COMPTE LA VARIATION DU SAUT DU MOMENT CINETIQUE SUIVANT L'ENVERGURE PERMET DE SATISFAIRE LA CONDITION DE KUTTA-JOUKOWSKY. L'OPTIMISATION DE LA GEOMETRIE DES AUBES DU ROTOR ET DU STATOR AINSI QUE L'ADAPTATION DE LA CARENE EST MENEE PAR UNE METHODE COUPLEE S2-S1 (AXI-SYMETRIQUE+AUBE A AUBE) ET 3D-SINGULARITES. LE MEMOIRE PRESENTE EGALEMENT LES PERFORMANCES DU SYSTEME PROPULSIF EN REGIME HORS NOMINAL.

Modélisation de l'écoulement autour d'une hélice marine par la méthode du potentiel

Author : Thierry Maître
Publisher :
ISBN 13 :
Total Pages : 181 pages
Book Rating : 4.:/5 (49 download)

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Book Synopsis Modélisation de l'écoulement autour d'une hélice marine par la méthode du potentiel by : Thierry Maître

Download or read book Modélisation de l'écoulement autour d'une hélice marine par la méthode du potentiel written by Thierry Maître and published by . This book was released on 1988 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: PRESENTATION D'UNE METHODE DE CALCUL NON LINEAIRE D'ECOULEMENTS A POTENTIEL AUTOUR D'OBSTACLES PORTANTS. LA THEORIE UTILISEE, PARTICULIEREMENT BIEN ADAPTEE AU CAS DES STRUCTURES DE FAIBLE EPAISSEUR, EST APPLIQUEE AU CALCUL D'UNE HELICE MARINE SUBCAVITANTE

Simulation d'un écoulement instationnaire cavitant autour d'une hélice marine

Author : Margarita DuFresne
Publisher : Independently Published
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.8/5 (78 download)

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Book Synopsis Simulation d'un écoulement instationnaire cavitant autour d'une hélice marine by : Margarita DuFresne

Download or read book Simulation d'un écoulement instationnaire cavitant autour d'une hélice marine written by Margarita DuFresne and published by Independently Published. This book was released on 2023-12-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'auteur de cette oeuvre, Margarita DUFRESNE, Docteur en Sciences Mécaniques pour les Ingénieurs de l'Université Technologique de Compiègne et Professeur associée de plusieurs Universités à l'échelle mondiale a de nombreuses années d'expérience en Dynamique des Fluides, numérique et expérimentale, au sein des unités de recherche et innovation des industries Aérospatiale, Automobile et Maritime. Son livre représente la mise en oeuvre d'un code de calcul non linéaire d'un écoulement instationnaire cavitant autour d'une hélice marine, utilisant la méthode du potentiel et de la singularité. Ce logiciel a été développé de manière universelle en permettant de calculer une hélice multipale avec nombre des pales quelconque. Les résultats du calcul ont été validés par les données expérimentales de l'IRCN (Institut de Recherche de la Construction Navale).

The Telephone, the Microphone and the Phonograph

Author : comte Th Du Moncel
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.A/5 ( download)

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Book Synopsis The Telephone, the Microphone and the Phonograph by : comte Th Du Moncel

Download or read book The Telephone, the Microphone and the Phonograph written by comte Th Du Moncel and published by . This book was released on 1879 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Theory of Propellers

Author : Theodore Theodorsen
Publisher :
ISBN 13 :
Total Pages : 184 pages
Book Rating : 4.3/5 (126 download)

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Book Synopsis The Theory of Propellers by : Theodore Theodorsen

Download or read book The Theory of Propellers written by Theodore Theodorsen and published by . This book was released on 1944 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: A technical method is given for calculating the axial interference velocity of a propeller. The method involves the use of certain weight functions P, Q, and F. Numerical values for the weight functions are given for two-blade, three-blade, and six-blade propellers.

History of Nonlinear Oscillations Theory in France (1880-1940)

Author : Jean-Marc Ginoux
Publisher : Springer
ISBN 13 : 3319552392
Total Pages : 402 pages
Book Rating : 4.3/5 (195 download)

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Book Synopsis History of Nonlinear Oscillations Theory in France (1880-1940) by : Jean-Marc Ginoux

Download or read book History of Nonlinear Oscillations Theory in France (1880-1940) written by Jean-Marc Ginoux and published by Springer. This book was released on 2017-04-18 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reveals the French scientific contribution to the mathematical theory of nonlinear oscillations and its development. The work offers a critical examination of sources with a focus on the twentieth century, especially the period between the wars. Readers will see that, contrary to what is often written, France's role has been significant. Important contributions were made through both the work of French scholars from within diverse disciplines (mathematicians, physicists, engineers), and through the geographical crossroads that France provided to scientific communication at the time. This study includes an examination of the period before the First World War which is vital to understanding the work of the later period. By examining literature sources such as periodicals on the topic of electricity from that era, the author has unearthed a very important text by Henri Poincaré, dating from 1908. In this work Poincaré applied the concept of limit cycle (which he had introduced in 1882 through his own works) to study the stability of the oscillations of a device for radio engineering. The “discovery” of this text means that the classical perspective of the historiography of this mathematical theory must be modified. Credit was hitherto attributed to the Russian mathematician Andronov, from correspondence dating to 1929. In the newly discovered Poincaré text there appears to be a strong interaction between science and technology or, more precisely, between mathematical analysis and radio engineering. This feature is one of the main components of the process of developing the theory of nonlinear oscillations. Indeed it is a feature of many of the texts referred to in these chapters, as they trace the significant developments to which France contributed. Scholars in the fields of the history of mathematics and the history of science, and anyone with an interest in the philosophical underpinnings of science will find this a particularly engaging account of scientific discovery and scholarly communication from an era full of exciting developments.

Marine Propellers and Propulsion

Author : John Carlton
Publisher : Butterworth-Heinemann
ISBN 13 : 0080971237
Total Pages : 539 pages
Book Rating : 4.0/5 (89 download)

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Book Synopsis Marine Propellers and Propulsion by : John Carlton

Download or read book Marine Propellers and Propulsion written by John Carlton and published by Butterworth-Heinemann. This book was released on 2012-10-30 with total page 539 pages. Available in PDF, EPUB and Kindle. Book excerpt: The early development of the screw propeller. Propeller geometry. The propeller environment. The ship wake field, propeller performance characteristics.

The Structure of Atmospheric Turbulence

Author : John Leask Lumley
Publisher :
ISBN 13 :
Total Pages : 264 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The Structure of Atmospheric Turbulence by : John Leask Lumley

Download or read book The Structure of Atmospheric Turbulence written by John Leask Lumley and published by . This book was released on 1964 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Advances in Uranium Ore Processing and Recovery from Non-conventional Resources

Author : International Atomic Energy Agency
Publisher : Agency
ISBN 13 :
Total Pages : 344 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Advances in Uranium Ore Processing and Recovery from Non-conventional Resources by : International Atomic Energy Agency

Download or read book Advances in Uranium Ore Processing and Recovery from Non-conventional Resources written by International Atomic Energy Agency and published by Agency. This book was released on 1985 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Experimental Performance and Steering Characteristics of Cycloidal Propellers

Author : N. L. Ficken
Publisher :
ISBN 13 :
Total Pages : 88 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Experimental Performance and Steering Characteristics of Cycloidal Propellers by : N. L. Ficken

Download or read book Experimental Performance and Steering Characteristics of Cycloidal Propellers written by N. L. Ficken and published by . This book was released on 1969 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents performance and steering characteristics of cycloidal propellers obtained from model tests for a series of cycloidal motions with various pitch ratios. Most of the results presented are for a six-bladed cycloidal propeller. Some performance characteristic curves obtained for a propeller with two and three blades are also included for comparison. (Author).

Scientific and Technical Aerospace Reports

Author :
Publisher :
ISBN 13 :
Total Pages : 296 pages
Book Rating : 4.:/5 (3 download)

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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 1991 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:

An Introduction to Differential Manifolds

Author : Jacques Lafontaine
Publisher : Springer
ISBN 13 : 3319207350
Total Pages : 408 pages
Book Rating : 4.3/5 (192 download)

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Book Synopsis An Introduction to Differential Manifolds by : Jacques Lafontaine

Download or read book An Introduction to Differential Manifolds written by Jacques Lafontaine and published by Springer. This book was released on 2015-07-29 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an introduction to differential manifolds. It gives solid preliminaries for more advanced topics: Riemannian manifolds, differential topology, Lie theory. It presupposes little background: the reader is only expected to master basic differential calculus, and a little point-set topology. The book covers the main topics of differential geometry: manifolds, tangent space, vector fields, differential forms, Lie groups, and a few more sophisticated topics such as de Rham cohomology, degree theory and the Gauss-Bonnet theorem for surfaces. Its ambition is to give solid foundations. In particular, the introduction of “abstract” notions such as manifolds or differential forms is motivated via questions and examples from mathematics or theoretical physics. More than 150 exercises, some of them easy and classical, some others more sophisticated, will help the beginner as well as the more expert reader. Solutions are provided for most of them. The book should be of interest to various readers: undergraduate and graduate students for a first contact to differential manifolds, mathematicians from other fields and physicists who wish to acquire some feeling about this beautiful theory. The original French text Introduction aux variétés différentielles has been a best-seller in its category in France for many years. Jacques Lafontaine was successively assistant Professor at Paris Diderot University and Professor at the University of Montpellier, where he is presently emeritus. His main research interests are Riemannian and pseudo-Riemannian geometry, including some aspects of mathematical relativity. Besides his personal research articles, he was involved in several textbooks and research monographs.

Technical Abstract Bulletin

Author :
Publisher :
ISBN 13 :
Total Pages : 440 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Technical Abstract Bulletin by :

Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1965 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Aeronomy

Author : P. M. Banks
Publisher : Elsevier
ISBN 13 : 1483260666
Total Pages : 445 pages
Book Rating : 4.4/5 (832 download)

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Book Synopsis Aeronomy by : P. M. Banks

Download or read book Aeronomy written by P. M. Banks and published by Elsevier. This book was released on 2013-09-24 with total page 445 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aeronomy, Part A is an attempt to make a comprehensive exposition of the processes in aeronomy, the study of composition, movement, and thermal balance of the upper regions of the planetary atmosphere. The text covers topics such as atmospheric regions and atmospheric density, the temperature and molecular mass of the atmosphere; the permanent constituents and the molecular and isotonic composition of the homosphere; and the transition from the homosphere to the heterosphere. Also covered are topics such as the temperature gradient and energies in the thermosphere, conditions at 200km and above 250km, solar radiation and ionization, and aeronomic reactions. The book is recommended for scientists, especially natural physicists, who would like to know more about the field of aeronomy and its advances.

Minimum competence in scientific English

Author : Sue Blattes
Publisher : L'Editeur : EDP Sciences
ISBN 13 : 9782868835888
Total Pages : 264 pages
Book Rating : 4.8/5 (358 download)

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Book Synopsis Minimum competence in scientific English by : Sue Blattes

Download or read book Minimum competence in scientific English written by Sue Blattes and published by L'Editeur : EDP Sciences. This book was released on 2003 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cet ouvrage, devenu célèbre sous son sigle MCSE, a déjà été utilisé par plus de 50 000 étudiants, chercheurs, professionnels. L'objectif est de lire et écrire des textes en anglais scientifique avec facilité et pertinence. L'ouvrage est conçu pour que l'apprenant devienne un véritable utilisateur de l'anglais. La méthode originale repose sur l'analyse des fonctions et structures nécessaires : measurement, frequency, comparison, modification, link words, time, cause and consequence, hypothesis, modality, purpose and process, impersonal forms, compound nouns and adjectives. Dans chaque unit, des tests d'auto-évaluation permettent de se situer et de construire son parcours de formation, d'abord en définissant ses objectifs à l'aide des key points et du lexis, puis, de façon plus personnalisée, en puisant dans les examples in context, checkpoints (back to basics, word web), web search, FAQs... MCSE est l'outil de base d'une méthode qui comprend aussi d'autres outils dans la même collection (Listening Comprehension for Scientiflc English et Speaking Skills in Scientitic English). L'ouvrage est destiné à tout apprenant de niveau baccalauréat qui désire acquérir une réelle compétence dans l'écriture et la lecture de textes en anglais scientifique.

Routledge International Handbook of Ignorance Studies

Author : Matthias Gross
Publisher : Routledge
ISBN 13 : 1317964675
Total Pages : 427 pages
Book Rating : 4.3/5 (179 download)

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Book Synopsis Routledge International Handbook of Ignorance Studies by : Matthias Gross

Download or read book Routledge International Handbook of Ignorance Studies written by Matthias Gross and published by Routledge. This book was released on 2015-05-15 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: Once treated as the absence of knowledge, ignorance today has become a highly influential topic in its own right, commanding growing attention across the natural and social sciences where a wide range of scholars have begun to explore the social life and political issues involved in the distribution and strategic use of not knowing. The field is growing fast and this handbook reflects this interdisciplinary field of study by drawing contributions from economics, sociology, history, philosophy, cultural studies, anthropology, feminist studies, and related fields in order to serve as a seminal guide to the political, legal and social uses of ignorance in social and political life. Chapter 33 of this book is freely available as a downloadable Open Access PDF under a Creative Commons Attribution-Non Commercial-No Derivatives 4.0 license available here: https://tandfbis.s3-us-west-2.amazonaws.com/rt-files/docs/Open+Access+Chapters/9780415718967_oachapter33.pdf