Download or read book Evaluation of a Hydrogen Fuel Cell Powered Blended Wing Body Aircraft Concept for Reduced Noise and Emissions written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-20 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the analytical modeling and evaluation of an unconventional commercial transport aircraft concept designed to address aircraft noise and emission issues. A blended-wing-body configuration with advanced technology hydrogen fuel cell electric propulsion is considered. Predicted noise and emission characteristics are compared to a current technology conventional configuration designed for the same mission. The significant technology issues which have to be addressed to make this concept a viable alternative to current aircraft designs are discussed. This concept is one of the "Quiet Green Transport" aircraft concepts studied as part of NASA's Revolutionary Aerospace Systems Concepts (RASC) Program. The RASC Program was initiated to develop revolutionary concepts that address strategic objectives of the NASA Enterprises, such as reducing aircraft noise and emissions, and to identify advanced technology requirements for the concepts.Guynn, Mark D. and Freh, Joshua E. and Olson, Erik D.Glenn Research Center; Langley Research CenterMATHEMATICAL MODELS; EVALUATION; AIRCRAFT DESIGN; AIRCRAFT NOISE; NOISE REDUCTION; AEROSPACE SYSTEMS; BLENDED-WING-BODY CONFIGURATIONS; COMMERCIAL AIRCRAFT; ELECTRIC PROPULSION; FUEL CELLS; NOISE MEASUREMENT
Download or read book Evaluation of an Aircraft Concept With Over Wing Hydrogen Fueled Engines for Reduced Noise and Emissions written by Mark D. Guynn and published by . This book was released on 2002 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sustainable Aviation Technology and Operations written by Roberto Sabatini and published by John Wiley & Sons. This book was released on 2023-10-16 with total page 549 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Aviation Technology and Operations Comprehensively covers research and development initiatives to enhance the environmental sustainability of the??aviation sector Sustainable Aviation Technology and Operations provides a comprehensive and timely outlook of recent research advances in aeronautics and air transport, with emphasis on both long-term sustainable development goals and current achievements. This book discusses some of the most promising advances in aircraft technologies, air traffic management and systems engineering methodologies for sustainable aviation. The topics covered include: propulsion, aerodynamics, avionics, structures, materials, airspace management, biofuels and sustainable lifecycle management. The physical processes associated with various aircraft emissions — including air pollutants, noise and contrails — are presented to support the development of computational models for aircraft design, flight path optimization and environmental impact assessment. Relevant advances in systems engineering and lifecycle management processes are also covered, bridging some of the existing gaps between academic research and industry best practices. A collection of research case studies complements the book, highlighting opportunities for a timely uptake of the most promising technologies, towards a more efficient and environmentally sustainable aviation future. Key features: Contains important research and industry relevant contributions from world-class experts. Addresses recent advances in aviation sustainability including multidisciplinary design approaches and multi-objective operational optimisation methods. Includes a number of research case studies, addressing propulsion, aerostructures, alternative aviation fuels, avionics, air traffic management, and sustainable lifecycle management solutions. Sustainable Aviation Technology and Operations is an excellent book for aerospace engineers, aviation scientists, researchers and graduate students involved in the field.
Download or read book Evaluation of an Aircraft Concept with Over Wing Hydrogen Fueled Engines for Reduced Noise and Emissions written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-09-15 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the analytical modeling and evaluation of an unconventional commercial transport aircraft concept designed to address aircraft noise and emission issues. A strut-braced wing configuration with overwing, ultra-high bypass ratio, hydrogen fueled turbofan engines is considered. Estimated noise and emission characteristics are compared to a conventional configuration designed for the same mission and significant benefits are identified. The design challenges and technology issues which would have to be addressed to make the concept a viable alternative to current aircraft designs are discussed. This concept is one of the "Quiet Green Transport" aircraft concepts studied as part of NASA's Revolutionary Aerospace Systems Concepts (RASC) Program. The RASC Program seeks to develop revolutionary concepts that address strategic objectives of the NASA Enterprises, such as reducing aircraft noise and emissions, and to identify enabling advanced technology requirements for the concepts.Guynn, Mark D. and Olson, Erik D.Langley Research CenterAIRCRAFT DESIGN; AIRCRAFT NOISE; HYDROGEN ENGINES; WINGS; EXHAUST EMISSION; NOISE REDUCTION; MATHEMATICAL MODELS; NOISE MEASUREMENT; BYPASS RATIO; THRUST-WEIGHT RATIO; AIRCRAFT PERFORMANCE; TURBOFAN ENGINES
Download or read book An Analytical Performance Assessment of a Fuel Cell Powered Small Electric Airplane written by and published by . This book was released on 2003 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Securing the Future of U S Air Transportation written by National Research Council and published by National Academies Press. This book was released on 2003-12-18 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: As recently as the summer of 2001, many travelers were dreading air transportation because of extensive delays associated with undercapacity of the system. That all changed on 9/11, and demand for air transportation has not yet returned to peak levels. Most U.S. airlines continue to struggle for survival, and some have filed for bankruptcy. The situation makes it difficult to argue that strong action is urgently needed to avert a crisis of undercapacity in the air transportation system. This report assesses the visions and goals for U.S. civil aviation and technology goals for the year 2050.
Download or read book An Analytical Performance Assessment of a Fuel Cell Powered Small Electric Airplane written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-06-20 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rapidly emerging fuel cell power technologies may be used to launch a new revolution of electric propulsion systems for light aircraft. Future small electric airplanes using fuel cell technologies hold the promise of high reliability, low maintenance, low noise, and with exception of water vapor zero emissions. This paper describes an analytical feasibility and performance assessment conducted by NASA's Glenn Research Center of a fuel cell-powered, propeller-driven, small electric airplane based on a model of the MCR 01 two-place kitplane. Berton, Jeffrey J. and Freeh, Joshua E. and Wickenheiser, Timothy J. Glenn Research Center NASA/TM-2003-212393, NAS1.15.212393, E-13972
Download or read book Methodology for Sizing and Optimising a Blended Wing Body with Distributed Electric Ducted Fans written by Alessandro Sgueglia and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increase of air traffic in the last decades and its projections pose akey challenge towards the carbon neutral growth objective. To cope with this societal goal,there is a need for disruptive air transport aircraft concepts featuring new technologies withlow environmental impact. Such future air vehicle relies on the various interactions betweensystems, disciplines and components. This Ph.D. research thus focuses on the developmentof a methodology dedicated to the exploration and performance evaluation of unconventionalconfigurations using innovative propulsion concepts. The use case to be considered is the optimisationat conceptual level of a Blended Wing-Body with distributed electric propulsion, apromising concept which combines high aerodynamic performances and benefits from electricpropulsion.The optimisation process based on FAST, the ISAE-SUPAERO / ONERA aircraft sizingtool, has been implemented within OpenMDAO, the NASA open-source multidisciplinaryanalysis and optimisation framework. With the idea of a progressive enhancement of themultidisciplinary design analysis and a better capture of the different effects, the two pioneeringelements have been studied separately. First, the classical process has been revisedto take into account the new hybrid powerplant. Second, a methodology has been revisedto consider a radically new airframe design. Last, a design process featuring both innovativeaspects has been developed to investigate a Blended Wing Body concept with distributedelectric propulsion.Concerning the design process, results show that the use of gradients in the optimisationprocedure speeds up the process against a gradient-free method up to 70%. This is an importantgain in time that facilitates designer's tasks. For the disruptive concept performances,results have been compared to the ones obtained for a conventional A320 type aircraft basedon the same top level requirements and technological horizon. Overall, the hybrid electricpropulsion concept is interesting as it allows zero emissions for Landing/Take-Off operations,improving the environmental footprint of the aircraft: fuel can be saved for missions below acertain range. This limitation is associated to the presence of batteries: indeed they introduceindeed a relevant penalty in weight that cannot be countered by benefits of electrification forlonger range. Additional simulations indicate that a Blended Wing-Body concept based on aturbo-electric only architecture is constantly performing better than the baseline within thelimits of the assumptions.
Download or read book Hydrogen Aircraft Technology written by G.Daniel Brewer and published by Routledge. This book was released on 2017-11-22 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid hydrogen is shown to be the ideal fuel for civil transport aircraft, as well as for many types of military aircraft. Hydrogen Aircraft Technology discusses the potential of hydrogen for subsonic, supersonic, and hypersonic applications. Designs with sample configurations of aircraft for all three speed categories are presented, in addition to performance comparisons to equivalent designs for aircraft using conventional kerosine-type fuel and configurations for aircraft using liquid methane fuel. Other topics discussed include conceptual designs of the principal elements of fuel containment systems required for cryogenic fuels, operational elements (e.g., pumps, valves, pressure regulators, heat exchangers, lines and fittings), modifications for turbine engines to maximize the benefit of hydrogen, safety aspects compared to kerosine and methane fueled designs, equipment and facility designs for servicing hydrogen-fueled aircraft, production methods for liquid hydrogen, and the environmental advantages for using liquid hydrogen. The book also presents a plan for conducting the necessary development of technology and introducing hydrogen fuel into the worldwide civil air transport industry. Hydrogen Aircraft Technology will provide fascinating reading for anyone interested in aircraft and hydrogen fuel designs.
Download or read book Commercial Aircraft Propulsion and Energy Systems Research written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-08-09 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary human activities that release carbon dioxide (CO2) into the atmosphere are the combustion of fossil fuels (coal, natural gas, and oil) to generate electricity, the provision of energy for transportation, and as a consequence of some industrial processes. Although aviation CO2 emissions only make up approximately 2.0 to 2.5 percent of total global annual CO2 emissions, research to reduce CO2 emissions is urgent because (1) such reductions may be legislated even as commercial air travel grows, (2) because it takes new technology a long time to propagate into and through the aviation fleet, and (3) because of the ongoing impact of global CO2 emissions. Commercial Aircraft Propulsion and Energy Systems Research develops a national research agenda for reducing CO2 emissions from commercial aviation. This report focuses on propulsion and energy technologies for reducing carbon emissions from large, commercial aircraftâ€" single-aisle and twin-aisle aircraft that carry 100 or more passengersâ€"because such aircraft account for more than 90 percent of global emissions from commercial aircraft. Moreover, while smaller aircraft also emit CO2, they make only a minor contribution to global emissions, and many technologies that reduce CO2 emissions for large aircraft also apply to smaller aircraft. As commercial aviation continues to grow in terms of revenue-passenger miles and cargo ton miles, CO2 emissions are expected to increase. To reduce the contribution of aviation to climate change, it is essential to improve the effectiveness of ongoing efforts to reduce emissions and initiate research into new approaches.
Download or read book Considerations for Hydrogen Fuel Cells in Airborne Applications written by AE-7F Hydrogen and Fuel Cells and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The scope of this joint EUROCAE/SAE report is to compile the considerations relating to airborne application of hydrogen fuel cells. This document provides a comprehensive analysis of the use of hydrogen as a fuel by describing its existing applications and the experience gained by exploiting fuel cells in sectors other than aviation. The use of hydrogen fuel cells in aircraft can help in meeting aviation environmental targets (including noise pollution) and can be vital to achieving efficient electrically propelled air vehicles. The experience gained with mature fuel cells in terrestrial applications and the handling of other gases in aviation, as presented herein, will help in alleviating safety concerns and in demystifying the usage of hydrogen in aviation. Hydrogen is the most abundant chemical element. One of the most valuable uses of hydrogen is in the hydrogen fuel cell. A fuel cell is used to combine hydrogen and oxygen to produce electricity and water. This use of hydrogen is becoming increasingly important, given the imperative to store and use energy without producing any greenhouse gasses.Fuel cells are being used in every sector of mobility (trains, cars, buses, ships, submarines, forklifts, even bicycles, etc.) except in civil aviation. Yet, fuel cells can be used to replace secondary power systems such as auxiliary power units and main engine-driven generators. Successful demonstrations of operating fuel cells in commercial airplanes and general aviation have already been performed.The hydrogen fuel cell is a key technology for reaching the goals for climate change prevention and for energy security in several commercial sectors, including transport, industry, and power generation/distribution. In addition, connecting different hydrogen-using sectors with transmission and distribution networks will increase the operational flexibility of the future low carbon energy economy.This SAE Aerospace Information Report will provide the needed comprehensive reference, background information, and potential benefits, aiming to promote the use of hydrogen-powered fuel cell systems in airborne applications.
Download or read book Fuel Cell Systems written by L.J.M.J. Blomen and published by Springer Science & Business Media. This book was released on 1994-01-31 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: In light of recent alarming environmental trends combined with increasing commercial viability of fuel cells, the time is propitious for a book focusing on the systematic aspects of cell plant technology. This multidisciplinary text covers the main types of fuel cells, R&D issues, plant design and construction, and economic factors to provide industrial and academic researchers working in electrical systems design, electrochemistry, and engineering with a unique and comprehensive resource.
Download or read book Hydrogen and Fuel Cell written by Johannes Töpler and published by Springer. This book was released on 2015-12-20 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces readers to hydrogen as an essential energy carrier for use with renewable sources of primary energy. It provides an overview of the state of the art, while also highlighting the developmental and market potential of hydrogen in the context of energy technologies; mobile, stationary and portable applications; uninterruptible power supplies and in the chemical industry. Written by experienced practitioners, the book addresses the needs of engineers, chemists and business managers, as well as graduate students and researchers.
Download or read book Hydrogen and Fuel Cells written by Bent Sørensen and published by Academic Press. This book was released on 2011-11-14 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: A hydrogen economy, in which this one gas provides the source of all energy needs, is often touted as the long-term solution to the environmental and security problems associated with fossil fuels. However, before hydrogen can be used as fuel on a global scale we must establish cost effective means of producing, storing, and distributing the gas, develop cost efficient technologies for converting hydrogen to electricity (e.g. fuel cells), and creating the infrastructure to support all this. Sorensen is the only text available that provides up to date coverage of all these issues at a level appropriate for the technical reader. The book not only describes the "how" and "where" aspects of hydrogen fuels cells usage, but also the obstacles and benefits of its use, as well as the social implications (both economically and environmental). Written by a world-renowned researcher in energy systems, this thoroughly illustrated and cross-referenced book is an excellent reference for researchers, professionals and students in the field of renewable energy. Updated sections on PEM fuel cells, Molten carbonate cells, Solid Oxide cells and Biofuel cells Updated material to reflect the growing commercial acceptance of stationary and portable fuel cell systems, while also recognizing the ongoing research in automotive fuel cell systems A new example of a regional system based on renewable energy sources reflects the growing international attention to uses of renewable energy as part of the energy grid Examples of life cycle analysis of environmental and social impacts
Download or read book Ultra Efficient Engine Technology Systems Integration and Environmental Assessment written by and published by . This book was released on 2002 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrogen Powered Hybrid Wing Body Freighter Systems Analysis and Conceptual Design Using the ACS Tool written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book How Mechanics Shaped the Modern World written by David Allen and published by Springer Science & Business Media. This book was released on 2013-09-24 with total page 425 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book presents a nontechnical view of the history of mechanics, from the Big Bang to present day. The impact of mechanics on the evolution of a variety of subjects is vividly illustrated, including astronomy, geology, astrophysics, anthropology, archeology, ancient history, Renaissance art, music, meteorology, modern structural engineering, mathematics, medicine, warfare, and sports. While enormous in scope, the subject matter is covered (with ample photographic support) at a level designed to capture the interest of both the learned and the curious. The book concludes with a creative and thoughtful examination of the current state of mechanics and possibilities for the future of mechanics.
