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Books > Professional & Technical > Transport technology > Aerospace & aviation technology
Over the last decade, Computational Fluid Dynamics (CFD) has become a - ture technology for the development of new products in aeronautical industry. Aerodynamic design engineers have progressively taken advantage of the pos- bilities o?ered by the numericalsolutionof the Reynolds averagedNavier-Stokes (RANS) equations. Signi?cant improvements in physical modeling and solution algorithms as well as the enormous increase of computer power enable hi- ?delity numerical simulations in all stages of aircraft development. In Germany, the national CFD project MEGAFLOW furthered the dev- opment and availability of RANS solvers for the prediction of complex ?ow problemssigni?cantly. MEGAFLOWwasinitiated by the?rstaviationresearch programoftheFederalGovernmentin1995undertheleadershipoftheDLR(see Kroll, N. , Fassbender, J. K. (Eds). : MEGAFLOW - Numerical Flow Simulation for Aircraft Design; Notes on Numerical Fluid Mechanics and Multidisciplinary Design, Volume 89, Springer, 2005). A network from aircraft industry, DLR and several universities was created with the goal to focus and direct development activities for numerical ?ow simulation towards a common aerodynamic si- lation system providing both a block-structured (FLOWer-Code) and a hybrid (TAU-Code) parallel ? ow prediction capability. Today, both codes have reached a high level of maturity and reliability. They are routinely used at DLR and German aeronautic industry for a wide range of aerodynamic applications. For many universities the MEGAFLOW software represents a platform for the - provementofphysicalmodelsandfortheinvestigationofcomplex?owproblems. The network was established as an e?cient group of very closely co-operating partners with supplementing expertises and experience.
Corrosion control in the aerospace industry has always been
important, but is becoming more so with the ageing of the aircraft
fleet. Corrosion control in the aerospace industry provides a
comprehensive review of the subject with real-world perspectives
and approaches to corrosion control and prevention.
In this issue of Notes on Numerical Fluid Mechanics and Multidisciplinary Design (NNFM) the results of the collaborative research center SFB 401 Flow Modulation and Fluid-Structure Interaction at Airplane Wings at the Rheinisch-Westf. alische Technische Hochschule (RWTH) Aachen University are reported. The funding was provided by the Deutsche Forschungsgeme- schaft (DFG). The research was performed from 1997 through 2008 and on the average consisted of more than 14 subprojects per year. Approximately 110 scientists from universities of the Austria, Belgium, France, Great Britain, Italy, Japan, Netherlands, Russia, South Korea, S- den, Switzerland, United States, and international research organizations such as DLR, NASA, NLR, ONERA were invited. The distinct scientists from all over the world gave seminars on topics related to the research ?elds tackled in the collaborative research center SFB 401. Some of them stayed for just a few days, others were hosted for a longer time to intensify the joint research. Besidesthescienti?cvaluetheFlow Modulation and Fluid-StructureInt- action at Airplane Wings programpossessesapronouncededucationalmerit. This becomes evident by the fact that 35 doctoral theses, 80 diploma theses, and 117 study theses were stimulated by the research program of the SFB 401 and ?nished before 2010. The authors of this issue of NNFM acknowledge the valuable support fromall guestscientists and everybodyscienti?callyinvolvedin the SFB 401.
Theoretical Modelling of Aeroheating on Sharpened Noses under Rarefied Gas Effects and Nonequilibrium Real Gas Effects employs a theoretical modeling method to study hypersonic flows and aeroheating on sharpened noses under rarefied gas effects and nonequilibrium real gas effects that are beyond the scope of traditional fluid mechanics. It reveals the nonlinear and nonequilibrium features, discusses the corresponding flow and heat transfer mechanisms, and ultimately establishes an analytical engineering theory framework for hypersonic rarefied and chemical nonequilibrium flows. The original analytical findings presented are not only of great academic significance, but also hold considerable potential for applications in engineering practice. The study explores a viable new approach, beyond the heavily relied-upon numerical methods and empirical formulas, to the present research field, which could be regarded as a successful implementation of the idea and methodology of the engineering sciences.
The capacity and quality of the atmospheric flight performance of space flight vehicles is characterized by their aerodynamic data bases. A complete aerodynamic data base would encompass the coefficients of the static longitudinal and lateral motions and the related dynamic coefficients. In this book the aerodynamics of 27 vehicles are considered.
Only a few of them did really fly. Therefore the aerodynamic data
bases are often not complete, in particular when the projects or
programs were more or less abruptly stopped, often due to political
decisions. Configurational design studies or the development of
demonstrators Flight mechanics needs the aerodynamic coefficients as function of a lot of variables. The allocation of the aerodynamic coefficients for a particular flight operation at a specific trajectory point is conducted by an aerodynamic model. The establishment of such models is described in this book. This book is written for graduate and doctoral students to give
them insight into the aerodynamics of the various flight
configurations. Further for design and development engineers in
industry and at research institutes (including universities)
searching for an appropriate vehicle shape, as well as for
non-specialists, who may be interested in
This book is both a repertory guide to the Convention on International Civil Aviation (Chicago Convention) as well as a legal analysis of the provisions of the treaty. It traces action taken by the ICAO Assembly and the Council in the implementation of the Convention from the first ICAO Assembly in 1947 until 2012. Above all, the book offers a commentary on the functional and moral fabric of the Chicago Convention, which is not only a multilateral legal instrument that sets out basic principles of air navigation and air transport, but also serves as a moral compass that brings the people of the world together. The teleological nature of the Chicago Convention is reflected from the outset from its Preamble which sets the tone and philosophy of the Convention that aviation builds friendship and understanding among all people, to its technical provisions that range from rules of the air to landing at airports and customs and immigration procedures. The book effectively demonstrates the Aristotelian principle that rules make people good by forming habits in them. Standardization, or in other words, compliance, is the driver of the Convention that keeps aviation safe, regular, efficient and economical. To that end, this book traces and details the sustained relevance of the Chicago Convention and the efforts of ICAO and the international aviation community towards keeping air transport on track and ready for its future exponential growth, both in letter and in spirit. "
This straightforward text, primer and reference introduces the
theoretical, testing and control aspects of structural dynamics and
vibration, as practised in industry today.
The integrated and advanced science research topic
Man-Machine-Environment system engineering (MMESE) was first
established in China by Professor Shengzhao Long in 1981, with
direct support from one of the greatest modern Chinese scientists,
Xuesen Qian. In a letter to Shengzhao Long from October 22nd, 1993,
Xuesen Qian wrote: You have created a very important modern science
and technology in China
The aim of this book is to provide an advanced introduction to inertial data processing (determination of attitude, velocity and position) along with design architectures and algorithms used to aid the inertial navigation system (INS). The emphasis is on the high-end sensors and systems used in aerospace applications (known as 'navigation grade' or 'nav grade'). The subject of inertial navigation systems and how to aid them (reduce their inherent error drift) is complex and multi-disciplinary. Mathematics and physics along with electrical, mechanical and software engineering all are involved. This book has been written to serve as an introduction for students and those new to the field. Specialized topics such as rotation matrices, quaternions and relevant stochastic processes are covered in the book. The reader is expected to have a basic understanding of vectors, matrices and matrix multiplication as well as freshman-level differential and integral calculus. The basics of inertial position/velocity/attitude updating are first presented with respect to a conceptually simple inertially-fixed reference frame before the impact of the spheroidal rotating earth is covered. Similarly, the key concepts of the Kalman filter are first presented in the context of a scalar filter. Important aspects of the prediction error covariance and Kalman gain equations are thus covered in an intuitive sense before the full matrix formulations are described. By the end of the book, a thorough treatment of modern aided-INS architectures is provided.
In this book, original and comprehensive studies discuss shielding effectiveness as related to conductivity, and the relationship of material chemistry to conductivity and corrosion are demonstrated. It is explained how to optimize shielding effectiveness for aircraft and other vehicles. Electrically conductive corrosion prevention materials capable of maintaining EMI/EMP protection of aircraft and weapon systems are identified.
This is the amazing story of Hanna Reitsch, one of the most celebrated women of the Third Reich. As a decorated test pilot for the Luftwaffe and a protege of Hitler, Reitsch was one of a handful of women who achieved personal success by breaking from the traditionally defined role of wife and mother in Nazi Germany. Reitsch's skills and accomplishments ultimately earned her an Iron Cross and celebrity status. A witness to the last days of the Third Reich, Reitsch visited Hitler's Berlin bunker where she received orders to deliver letters designed to rally the Luftwaffe. She left on this futile mission only minutes before Hitler's marriage to Eva Braun. This is the amazing story of Hanna Reitsch, a woman who excelled in an environment that for most was extremely repressive—Germany before and during World War II. She achieved personal success when she escaped the culturally defined role of wife and mother in Nazi Germany to live her passion for flying. Reitsch began her career flying gliders, setting both distance and endurance records in the 1930s. As the war approached she became a test pilot for new and dangerous aircraft for the Luftwaffe. The aircraft she flew included a large number of gliders and military aircraft, including Focke-Achgelis FW 61 Hubschrauber (the first practical helicopter), the jet-powered piloted version of the V-1 buzz bomb, and the rocket-powered Messerschmitt 163. Her achievements as a test pilot made her a celebrity in Nazi Germany and earned her an Iron Cross and the friendship of Hitler. As a friend of the Fuehrer, she became an eyewitness to the fall of the Third Reich. In the final days of World War II, she flew with her friend and lover, Luftwaffe General Robert Ritter von Greim—to join Hitler in his bunker. Minutes before Hitler was to marry Eva Braun, Reitsch and von Greim—on Hitler's orders—flew from Berlin to Rechlin in a desperate attempt to rally the Luftwaffe and save the Reich. After the war, Reitsch was interviewed as a potential witness for the Nuremberg War Crimes Trials. Her interviewer stated that [Hanna's] account of the flight into Berlin to report to Hitler and of her stay in the Fuehrer's bunker is probably as accurate a one as will be obtained of those last days. It has remained so for half a century. This book also recounts a vivid and remarkable encounter in a cemetery in Kitzbuehel, Austria, in June of 1945, between Leni Riefenstahl, the filmmaker, perhaps the only other woman to be so successful in the Third Reich, and Hanna Reitsch. During this chance encounter, Hanna shows the letters of Josef and Magda Goebbels to Riefenstahl and the reader shares their shocking contents. Hanna Reitsch found in the Nazi establishment opportunities and rewards for her achievements. Consorting with the devil paid well; yet, in the end, she was called on to pay back more than she had received. Her story shows how hard it is for a woman to excel in a repressive society, and how that success can lead to defeat and misery.
This book concentrates on the subject of health monitoring technology of Liquid Rocket Engine (LRE), including its failure analysis, fault diagnosis and fault prediction. Since no similar issue has been published, the failure pattern and mechanism analysis of the LRE from the system stage are of particular interest to the readers. Furthermore, application cases used to validate the efficacy of the fault diagnosis and prediction methods of the LRE are different from the others. The readers can learn the system stage modeling, analyzing and testing methods of the LRE system as well as corresponding fault diagnosis and prediction methods. This book will benefit researchers and students who are pursuing aerospace technology, fault detection, diagnostics and corresponding applications.
This book focuses on developing strategies for ultra-lean combustion of natural gas and hydrogen, and contributes to the research on extending the lean flammability limit of hydrogen and air using a hot supersonic jet. The author addresses experimental methods, data analysis techniques, and results throughout each chapter and: Explains the fundamental mechanisms behind turbulent hot jet ignition using non-dimensional analysis Explores ignition characteristics by impinging hot jet and multiple jets in relation to better controllability and lean combustion Explores how different instability modes interact with the acoustic modes of the combustion chamber. This book provides a potential answer to some of the issues that arise from lean engine operation, such as poor ignition, engine misfire, cycle-to-cycle variability, combustion instability, reduction in efficiency, and an increase in unburned hydrocarbon emissions. This thesis was submitted to and approved by Purdue University.
"This book looks at the space industry from a business perspective, with a focus on international competition. The space industry traces its origins to the middle of last century as a government/military domain and the author now looks at the ongoing evolution of space exploration and travel, and projects the future of the industry"--
This book is intended as a system engineer's compendium, explaining the dependencies and technical interactions between the onboard computer hardware, the onboard software and the spacecraft operations from ground. After a brief introduction on the subsequent development in all three fields over the spacecraft engineering phases each of the main topis is treated in depth in a separate part. The features of today's onboard computers are explained at hand of their historic evolution over the decades from the early days of spaceflight up to today. Latest system-on-chip processor architectures are treated as well as all onboard computer major components. After the onboard computer hardware the corresponding software is treated in a separate part. Both the software static architecture as well as the dynamic architecture are covered, and development technologies as well as software verification approaches are included. Following these two parts on the onboard architecture, the last part covers the concepts of spacecraft operations from ground. This includes the nominal operations concepts, the redundancy concept and the topic of failure detection, isolation and recovery. The baseline examples in the book are taken from the domain of satellites and deep space probes. The principles and many cited standards on spacecraft commanding, hardware and software however also apply to other space applications like launchers. The book is equally applicable for students as well for system engineers in space industry.
"Advanced Control of Turbofan Engines" describes the operational performance requirements of turbofan (commercial) engines from a controls systems perspective, covering industry-standard methods and research-edge advances. This book allows the reader to design controllers and produce realistic simulations using public-domain software like CMAPSS: Commercial Modular Aero-Propulsion System Simulation, whose versions are released to the public by NASA. The scope of the book is centered on the design of thrust controllers for both steady flight and transient maneuvers. Classical control theory is not dwelled on, but instead an introduction to general undergraduate control techniques is provided."Advanced Control of Turbofan Engines" is ideal for graduate students doing research in aircraft engine control and non-aerospace oriented control engineers who need an introduction to the field."
This book focuses on the theory and design of special space orbits. Offering a systematic and detailed introduction to the hovering orbit, spiral cruising orbit, multi-target rendezvous orbit, initiative approaching orbit, responsive orbit and earth pole-sitter orbit, it also discusses the concept, theory, design methods and application of special space orbits, particularly the design and control method based on kinematics and astrodynamics. In addition the book presents the latest research and its application in space missions. It is intended for researchers, engineers and postgraduates, especially those working in the fields of orbit design and control, as well as space-mission planning and research.
This book focuses on the nonlinear behaviour of thin-wall shells
(single- and multilayered with delamination areas) under various
uniform and non-uniform loadings.
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