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Preliminary Considerations In Ducted Fan Propulsion System Design
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Book Synopsis Preliminary Considerations in Ducted Fan Propulsion System Design by : Kent McKean Cooper
Download or read book Preliminary Considerations in Ducted Fan Propulsion System Design written by Kent McKean Cooper and published by . This book was released on 1968 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ducted Fan Design: Volume 1 - Propulsion Physics and Design of Fans and Long-Chord Ducts by : Marc de Piolenc
Download or read book Ducted Fan Design: Volume 1 - Propulsion Physics and Design of Fans and Long-Chord Ducts written by Marc de Piolenc and published by Lulu.com. This book was released on with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Preliminary Design of Ducted Fan for VTOL UAV by : Boon Chieh Lee
Download or read book The Preliminary Design of Ducted Fan for VTOL UAV written by Boon Chieh Lee and published by . This book was released on 2007 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States by :
Download or read book Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1968 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Master's Theses and Doctoral Dissertations in the Pure and Applied Sciences by :
Download or read book Master's Theses and Doctoral Dissertations in the Pure and Applied Sciences written by and published by . This book was released on 1969 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :National Academies of Sciences, Engineering, and Medicine Publisher :National Academies Press ISBN 13 :0309440998 Total Pages :123 pages Book Rating :4.3/5 (94 download)
Book Synopsis Commercial Aircraft Propulsion and Energy Systems Research by : National Academies of Sciences, Engineering, and Medicine
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.
Book Synopsis Design of a ducted fan propulsion unit for a radio controlled craft by : Doug L. Cook
Download or read book Design of a ducted fan propulsion unit for a radio controlled craft written by Doug L. Cook and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of a 32 Inch Diameter Levitated Ducted Fan Conceptual Design by : Dennis J. Eichenberg
Download or read book Development of a 32 Inch Diameter Levitated Ducted Fan Conceptual Design written by Dennis J. Eichenberg and published by BiblioGov. This book was released on 2013-07 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA John H. Glenn Research Center has developed a revolutionary 32 in. diameter Levitated Ducted Fan (LDF) conceptual design. The objective of this work is to develop a viable non-contact propulsion system utilizing Halbach arrays for all-electric flight, and many other applications. This concept will help to reduce harmful emissions, reduce the Nation s dependence on fossil fuels, and mitigate many of the concerns and limitations encountered in conventional aircraft propulsors. The physical layout consists of a ducted fan drum rotor with blades attached at the outer diameter and supported by a stress tuner ring at the inner diameter. The rotor is contained within a stator. This concept exploits the unique physical dimensions and large available surface area to optimize a custom, integrated, electromagnetic system that provides both the levitation and propulsion functions. The rotor is driven by modulated electromagnetic fields between the rotor and the stator. When set in motion, the time varying magnetic fields interact with passive coils in the stator assembly to produce repulsive forces between the stator and the rotor providing magnetic suspension. LDF can provide significant improvements in aviation efficiency, reliability, and safety, and has potential application in ultra-efficient motors, computers, and space power systems.
Book Synopsis Aircraft Design Projects by : Lloyd R. Jenkinson
Download or read book Aircraft Design Projects written by Lloyd R. Jenkinson and published by Elsevier. This book was released on 2003-04-28 with total page 393 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written with students of aerospace or aeronautical engineering firmly in mind, this is a practical and wide-ranging book that draws together the various theoretical elements of aircraft design - structures, aerodynamics, propulsion, control and others - and guides the reader in applying them in practice. Based on a range of detailed real-life aircraft design projects, including military training, commercial and concept aircraft, the experienced UK and US based authors present engineering students with an essential toolkit and reference to support their own project work.All aircraft projects are unique and it is impossible to provide a template for the work involved in the design process. However, with the knowledge of the steps in the initial design process and of previous experience from similar projects, students will be freer to concentrate on the innovative and analytical aspects of their course project. The authors bring a unique combination of perspectives and experience to this text. It reflects both British and American academic practices in teaching aircraft design. Lloyd Jenkinson has taught aircraft design at both Loughborough and Southampton universities in the UK and Jim Marchman has taught both aircraft and spacecraft design at Virginia Tech in the US. * Demonstrates how basic aircraft design processes can be successfully applied in reality* Case studies allow both student and instructor to examine particular design challenges * Covers commercial and successful student design projects, and includes over 200 high quality illustrations
Book Synopsis Assessment of the Actuator Line Method Applied to Ducted Fan Geometries by : Marc-Antoine Breault
Download or read book Assessment of the Actuator Line Method Applied to Ducted Fan Geometries written by Marc-Antoine Breault and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The emerging market of urban air mobility alongside the increasing number of hybrid-electric or purely electric propulsion systems has renewed the interest of the aeronautical sector for ducted fans. Ducted propulsion systems are particularly well suited for these use cases, as they often result in power savings during flight missions where hovering and low flight speed are prominent. Other advantages of ducted fans include lower and more directional sound emissions and inherently increased safety. When designing these systems, the aerodynamicist can choose between rapid but low-fidelity tools such as numerical methods based on the momentum theory, or more accurate but also more time-consuming tools such as wall-resolved CFD. In between these two extremes, there are also medium-fidelity tools available if a more detailed solution is needed but resorting to wall-resolved CFD is still cost-prohibitive. Although medium-fidelity methods are well developed and continue to make progress for conventional unducted rotors, their application to their ducted counterpart is years behind the state of the art for open rotors. Inspired by one of these medium-fidelity methods called the Actuator Line Method (ALM), which is widely adopted by the scientific community and extensively used for open rotor simulations, the aim of this work is to extend the ALM to ducted geometries. This research project is conducted in collaboration with the industrial partner Bell Textron Canada® which provided the studied ducted fan geometry as well as experimental data used to validate the ALM code. Since the flow inside a ducted propulsion system is quite complex and involves a strong interaction between the duct and the rotor, simpler validation cases are also used to validate specific attributes of the ALM code. The ALM results indicate that the technique is suitable for simulating ducted propulsion systems. It is particularly interesting for rapid computation of performance curves and for evaluating the effect of macroscopic changes such as the number of blades, rotational speed or rotor diameter. Shortcomings in the predictive capabilities are also reported concerning more local effects, such as the behaviour of the blade loading at the tip of the blade. Nevertheless, the ALM developed in this work still allows the design space to be explored rapidly and at a reduced computational cost when compared with wall-resolved CFD. This work presents the theory behind the ALM code, the underlying physical models as well as a detailed comparison of the ALM results with wind tunnel and wall-resolved CFD data. Numerous improvements to the code are also proposed for future research on the subject.
Author :National Aeronautics and Space Administration (NASA) Publisher :Createspace Independent Publishing Platform ISBN 13 :9781720477495 Total Pages :40 pages Book Rating :4.4/5 (774 download)
Book Synopsis Development of a 32 Inch Diameter Levitated Ducted Fan Conceptual Design by : National Aeronautics and Space Administration (NASA)
Download or read book Development of a 32 Inch Diameter Levitated Ducted Fan Conceptual Design written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-05-30 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA John H. Glenn Research Center has developed a revolutionary 32 in. diameter Levitated Ducted Fan (LDF) conceptual design. The objective of this work is to develop a viable non-contact propulsion system utilizing Halbach arrays for all-electric flight, and many other applications. This concept will help to reduce harmful emissions, reduce the Nation s dependence on fossil fuels, and mitigate many of the concerns and limitations encountered in conventional aircraft propulsors. The physical layout consists of a ducted fan drum rotor with blades attached at the outer diameter and supported by a stress tuner ring at the inner diameter. The rotor is contained within a stator. This concept exploits the unique physical dimensions and large available surface area to optimize a custom, integrated, electromagnetic system that provides both the levitation and propulsion functions. The rotor is driven by modulated electromagnetic fields between the rotor and the stator. When set in motion, the time varying magnetic fields interact with passive coils in the stator assembly to produce repulsive forces between the stator and the rotor providing magnetic suspension. LDF can provide significant improvements in aviation efficiency, reliability, and safety, and has potential application in ultra-efficient motors, computers, and space power systems.Eichenberg, Dennis J. and Gallo, Christopher a. and Solano, Paul A. and Thompson, William K. and Vrnak, Daniel R.Glenn Research CenterDUCTED FANS; SPACECRAFT POWER SUPPLIES; MAGNETIC FIELDS; RELIABILITY; FOSSIL FUELS; FLIGHT SAFETY; ELECTROMAGNETIC FIELDS; SYSTEMS INTEGRATION; STATORS; ROTORS
Book Synopsis Preliminary Investigation of a Ducted Fan in Lifting Forward Flight by : Norman D. Ham
Download or read book Preliminary Investigation of a Ducted Fan in Lifting Forward Flight written by Norman D. Ham and published by . This book was released on 1958 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design Definition Study of NASA/Navy Lift/cruise Fan V/STOL Aircraft by : R.L. Cavage
Download or read book Design Definition Study of NASA/Navy Lift/cruise Fan V/STOL Aircraft written by R.L. Cavage and published by . This book was released on 1975 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Ducted Fan for Aircraft Propulsion by : Frank Murphy Melsheimer
Download or read book Development of Ducted Fan for Aircraft Propulsion written by Frank Murphy Melsheimer and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Institute of Aeronautics and Astronautics. Technical Information Service Publisher : ISBN 13 : Total Pages :184 pages Book Rating :4.3/5 (91 download)
Book Synopsis The Finding Guide to AIAA Meeting Papers by : American Institute of Aeronautics and Astronautics. Technical Information Service
Download or read book The Finding Guide to AIAA Meeting Papers written by American Institute of Aeronautics and Astronautics. Technical Information Service and published by . This book was released on 1996 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis WIG Craft and Ekranoplan by : Liang Yun
Download or read book WIG Craft and Ekranoplan written by Liang Yun and published by Springer Science & Business Media. This book was released on 2009-12-03 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last half-century, high-speed water transportation has developed rapidly. Novel high-performance marine vehicles, such as the air cushion vehicle (ACV), surface effect ship (SES), high-speed monohull craft (MHC), catamaran (CAT), hydrofoil craft (HYC), wave-piercing craft (WPC) and small water area twin hull craft (SWATH) have all developed as concepts, achieving varying degrees of commercial and military success. Prototype ACV and SES have achieved speeds of 100 knots in at calm con- tions; however, the normal cruising speed for commercial operations has remained around 35–50 knots. This is partly due to increased drag in an average coastal s- way where such craft operate services and partly due to limitations of the propulsion systems for such craft. Water jets and water propellers face limitations due to c- itation at high speed, for example. SWATH are designed for reduced motions in a seaway, but the hull form is not a low drag form suitable for high-speed operation. So that seems to lead to a problem – maintain water contact and either water propulsion systems run out of power or craft motions and speed loss are a problem in higher seastates. The only way to higher speed would appear to be to disconnect completely from the water surface. You, the reader, might respond with a question about racing hydroplanes, which manage speeds of above 200 kph. Yes, true, but the power-to-weight ratio is extremely high on such racing machines and not economic if translated into a useful commercial vessel.
Book Synopsis Ducted Fan and Radiator Design by : M. G. Paish
Download or read book Ducted Fan and Radiator Design written by M. G. Paish and published by . This book was released on 1967 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: