Simulation Driven Aerodynamic Design Using Variable Fidelity Models

Autor: Leifur Leifsson
Publisher: World Scientific
ISBN: 1783266309
File Size: 72,51 MB
Format: PDF, ePub
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Computer simulations is a fundamental tool of the design process in many engineering disciplines including aerospace engineering. However, although high-fidelity numerical models are accurate, they can be computationally expensive with evaluation time for a single design as long as hours, days or even weeks. Simulation-driven design using conventional optimization techniques may be therefore prohibitive. This book explores the alternative: performing computationally efficient design using surrogate-based optimization, where the high-fidelity model is replaced by its computationally cheap but still reasonably accurate representation: a surrogate. The emphasis is on physics-based surrogates. Application-wise, the focus is on aerodynamics and the methods and techniques described in the book are demonstrated using aerodynamic shape optimization cases. Applications in other engineering fields are also demonstrated. State-of-the-art techniques and a depth of coverage never published before make this a unique and essential book for all researchers working in aerospace and other engineering areas and dealing with optimization, computationally expensive design problems, and simulation-driven design. Contents:Motivation and Problem Formulation:IntroductionAerodynamic Shape OptimizationOptimization Techniques:Simulation-Driven Design: Direct MethodsSurrogate-Based OptimizationSBO with Approximation-Based SurrogatesSBO with Physics-Based SurrogatesAerodynamics Modeling:Geometry ParameterizationHigh-Fidelity Aerodynamic ModelsLow-Fidelity Aerodynamics ModelsApplications:Transonic Airfoil Shape DesignTransonic Wing Shape DesignSubsonic Shape DesignSelected Applications of Surrogate-Based Optimization in Other AreasSurrogate-Based Optimization with MATLABConclusion:Practical Aspects of Variable-Fidelity Design Readership: Graduate students and researchers in the field of engineering, in particular, aerospace engineering. Key Features:Gathers a number of relevant techniques that were never compiled in one publication before, and certain state-of-the-art techniques have never been published in book formCompact and self-contained introduction to the area of surrogate-based optimization and variable-fidelity optimizationAt present, this is the only book available on the market that offers coverage of variable-fidelity optimization methodsKeywords:Aerodynamic Shape Optimization;Computational Fluid Dynamics (CFD);Surrogate Modeling;Surrogate-based Optimization;Variable-fidelity Simulations;Simulation-driven Design

Lubrication Fundamentals Second Edition

Autor: Don M. Pirro
Publisher: CRC Press
ISBN: 9781420029239
File Size: 12,58 MB
Format: PDF, ePub
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Building on the cornerstone of the first edition, Lubrication Fundamentals Second Edition outlines the emergence of higher performance-specialty application oils and greases and emphasizes the need for lubrication and careful lubricant selection. Thoroughly updated and rewritten since the previous edition reached its 10th printing, the book discusses product basics, machine elements that require lubrication, methods of application, lubricant storage and handling, and lubricant conservation. Keeping the characteristics that made the first edition a classic reference, this second edition provides current information in the format readers have come to trust. About the authors . . . D. M. PIRRO is the Equipment Builder and OEM Manager, ExxonMobil Corporation, Fairfax, Virginia. The author or contributing editor of several scholarly articles on synthetic lubes, environmental awareness applications, grease technology, lubricant interchangeability, and oil analysis, Mr. Pirro is a Certified Lubrication Specialist and a member of the Society of Tribologists and Lubrication Engineers and the Association of Manufacturing Technology. He received the B.S. degree (1978) in mechanical engineering and the B.A. degree (1978) in business administration from Rutgers University, New Brunswick, New Jersey. A. A. WESSOL is a part-time Lubrication Consultant for the ExxonMobil Corporation in Manassas, Virginia. Mr. Wessol retired from the Mobil Corporation after 24 years in various advanced technical positions. The author or coauthor of numerous professional papers on the environmental aspects of lubrication, plant engineering, hydraulics, and pneumatics, he received the B.S. degree (1972) in mathematics, physics, and chemistry from the University of Pittsburgh, Pennsylvania.

Mill S On Liberty

Autor: Geoffrey Scarre
Publisher: Bloomsbury Publishing
ISBN: 1441165703
File Size: 40,55 MB
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Continuum's Reader's Guides are clear, concise and accessible introductions to classic works of philosophy. Each book explores the major themes, historical and philosophical context and key passages of a major philosophical text, guiding the reader toward a thorough understanding of often demanding material. Ideal for undergraduate students, the guides provide an essential resource for anyone who needs to get to grips with a philosophical text. First published in 1859, John Stuart Mill's On Liberty has exerted an enormous influence on philosophical and political thought ever since. Mill, also famous for his writings on utilitarianism, argues that individual liberty is of paramount importance and that any infringements of it must be kept to an absolute minimum. Mill himself described his brief but brilliant book as asserting 'one very simple principle . . . that the sole end for which mankind are warranted, individually or collectively, in interfering in the liberty of any of their number, is self-protection.' Of course, drawing out the implications of this principle have proved to be anything but simple, and the various interpretations of Mill's doctrine have spawned countless debates and mountains of secondary literature. Numerous moral and political theorists have drawn on Mill's work, including Berlin, Rawls and Raz, and his ideas remain as relevant as ever today.

John Stuart Mill

Autor: R. J. Halliday
Publisher: Psychology Press
ISBN: 0415326869
File Size: 37,71 MB
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First published in 1976, this volume offers a significant new interpretation of Mill's political thought, Mill's ambivalent attitude to democracy is carefully examined. The implications for modern democracy of Mill's views on consensus and leadership, bureaucracy and participation, equality and liberty emerge from a deep understanding of Mill's place in 19th century ideas.

From Cotton Mill To Business Empire

Autor: Elisabeth Köll
Publisher: Harvard Univ Asia Center
ISBN: 9780674013940
File Size: 78,39 MB
Format: PDF
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The concepts, definitions, and interpretations of property rights, corporate structures, and business practices in contemporary China have historical, institutional, and cultural roots. In tracing the development under founder Zhang Jian (1853-1926) and his successors of the Dasheng Cotton Mill in Nantong, the author documents the growth of regional enterprises as local business empires from the 1890s until the foundation of the People's Republic in 1949.