Download or read book Development and Optimization of a Tridyne Pressurization System for Pressure Fed Launch Vehicles written by and published by . This book was released on 2006 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the recent years, Microcosm has been pursuing the development of a Tridyne-based pressurization system and its implementation in the Scorpius family of launch vehicles to obtain substantial gain in payload to orbit. This technology program was initiated with an IR & D program and matured with contracts from the National Reconnaissance Office (NRO), and the Air Force Research Laboratory (AFRL). The Tridyne pressurization system functions by mixing small amounts of hydrogen and oxygen with the pressurant gas (typically helium). When the mixture is passed through a catalyst bed, the hydrogen and oxygen react to produce heat. The result is hot pressurant gas, with a small amount of water vapor remaining from the combustion process. The implementation scheme developed for the Scorpius family of launch vehicles involves returning some of the heat to the Tridyne mixture in the pressurant tank by means of an internal heat exchanger. This offsets the expansion cooling such that the temperature of the pressurant actually rises as the pressurant is used. The remaining energy is used to elevate the temperature of the gas delivered to the propellant tanks to near the maximum allowable operating temperature of the downstream components (typically about 200 to 250 deg F) such as the regulator and the composite over-wrapped propellant tanks. The result of heating the helium in this way was shown to reduce the mass and volume of required helium and the associated tankage by nearly 50%, resulting in substantial payload gain.
Download or read book Lightweight Advanced Post Boost Vehicle Propulsion Feed System Development written by ROCKWELL INTERNATIONAL CANOGA PARK CA ROCKETDYNE DIV. and published by . This book was released on 1981 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: An advanced development contract was conducted in support of the Air Force Ballistic Missile program to demonstrate a lightweight liquid-bipropellant feed system for application in an advanced post-boost propulsion system. The feed system is composed of composite-wrapped aluminum propellant storage tanks and a catalytically reacted warm-gas pressurization subsystem. Tank capability was demonstrated in workhorse expulsion characterization tests (expulsion efficiency of 98.1 to 99.3 percent) and fabrication and expulsion of a flight weight propulsion storage assembly (PSA). The latter was accomplished with a representative pressurization subsystem consisting of a composite-wrapped aluminum pressurant tank with Tridyne pressurant (helium, oxygen, and hydrogen), an electronically controlled pressure regulator, a catalytic reactor, and valves. The reactor supplied warm-gas pressurant to the PSAs at up to 1158 F. The delivered propellant pressure was controlled to 300 + or - 4 psia during pulsed propellant flow by continuous modulation of the pressurant flow. The feed system was sized to deliver 1400 pounds of N2O4 and MMH with each PSA weighing 59 pounds, and the PS weighing 41 pounds. The resultant weight savings was 27 to 35 percent when compared to more conventional systems. (Author).
Download or read book Vehicle Propulsion Systems written by L. Guzzella and published by Springer Science & Business Media. This book was released on 2005 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Automobiles are responsible for a substantial part of the world's consumption of primary energy, mostly fossil liquid hydrocarbons. The reduction of the fuel consumption of these vehicles has become a top priority. Many ideas to reach that objective have been presented. In most cases these systems are more complex than the traditional approaches. For such complex systems a heuristic design approach fails. The only way to deal with this situation is to employ model-based methods. This text provides an introduction to the mathematical modeling and subsequent optimization of vehicle propulsion systems and their supervisory control algorithms.
Download or read book Proceedings of the 12th Reinventing Space Conference written by Scott Hatton and published by Springer. This book was released on 2016-12-25 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the 2014 Reinventing Space conference present a number of questions in the context of a constantly innovating space industry, from addressing the future of global cooperation, investigating the impact of cuts in US government spending on the private space sector, and probing the overall future of the commercial launch sector. Space tourism and new technology promise the revival of interest in space development (the Apollo Era was the first period of intense space activity and growth). The need to create dramatically lower cost, responsive and reliable launch systems and spacecraft has never been more vital. Advances in technology are allowing smaller and cheaper satellites to be orbited - from cubesats to nanosatellites to femtosatellites. Thanks to more efficient new launch possibilities, low cost access to space is becoming ever more achievable. Commercial companies and countries are targeting the industry with new funding. Organised by the British Interplanetary Society, the presentations at this conference thoroughly address these challenges and opportunities.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1970 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Review of United States Air Force and Department of Defense Aerospace Propulsion Needs written by National Research Council and published by National Academies Press. This book was released on 2007-01-14 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Rocket and air-breathing propulsion systems are the foundation on which planning for future aerospace systems rests. A Review of United States Air Force and Department of Defense Aerospace Propulsion Needs assesses the existing technical base in these areas and examines the future Air Force capabilities the base will be expected to support. This report also defines gaps and recommends where future warfighter capabilities not yet fully defined could be met by current science and technology development plans.
Download or read book Leo on the Cheap written by John R. London and published by . This book was released on 2002-02-01 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Colonel London has developed an extensive and well-documented amount of information on the original causes of high launch costs, the specifics of current costs, and the reasons that these costs continue to be perpetuated. He offers recommendations that buck the popular trend of advanced technology solutions, and he describes how a significant reduction in launch costs would have a broad positive impact on a variety of space systems and activities. His research is thorough and his command of the subject is impressive.
Download or read book After LM written by John F. Connolly and published by . This book was released on 2020 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Aerodynamics of Heavy Vehicles III written by Andreas Dillmann and published by Springer. This book was released on 2015-08-19 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains papers presented at the International conference “The Aerodynamics of Heavy Vehicles III: Trucks, Buses and Trains” held in Potsdam, Germany, September 12-17, 2010 by Engineering Conferences International (ECI). Leading scientists and engineers from industry, universities and research laboratories, including truck and high-speed train manufacturers and operators were brought together to discuss computer simulation and experimental techniques to be applied for the design of more efficient trucks, buses and high-speed trains in the future. This conference was the third in the series after Monterey-Pacific Groove in 2002 and Lake Tahoe in 2007.The presentations address different aspects of train aerodynamics (cross wind effects, underbody flow, tunnel aerodynamics and aeroacoustics, experimental techniques), truck aerodynamics (drag reduction, flow control, experimental and computational techniques) as well as computational fluid dynamics and bluff body, wake and jet flows.
Download or read book Stages to Saturn written by Roger E. Bilstein and published by DIANE Publishing. This book was released on 1999-08 with total page 537 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ames Research Center written by and published by . This book was released on 1968 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the National Aerospace Initiative written by National Research Council and published by National Academies Press. This book was released on 2004-06-16 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Aerospace Initiative (NAI) was conceived as a joint effort between the Department of Defense (DOD) and the National Aeronautics and Space Administration (NASA) to sustain the aerospace leadership of the United States through the acceleration of selected aerospace technologies: hypersonic flight, access to space, and space technologies. The Air Force became concerned about the NAI's possible consequences on Air Force programs and budget if NAI program decisions differed from Air Force priorities. To examine this issue, it asked the NRC for an independent review of the NAI. This report presents the results of that assessment. It focuses on three questions asked by the Air Force: is NAI technically feasible in the time frame laid out; is it financially feasible over that period; and is it operationally relevant.
Download or read book Electric Propulsion Development written by Ernst Stuhlinger and published by Elsevier. This book was released on 1963-01-01 with total page 763 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in Astronautics and Aeronautics, Volume 9: Electric Propulsion Development covers the proceedings of the Second Electric Propulsion Conference of the American Rocker Society, held in Berkeley, California on March 14-16, 1962. The conference focuses on the existing problems in electric propulsion and their possible solutions. This book is organized into four sections encompassing 35 chapters. The first section deals with the thermodynamics of arcs; the problems of heat and momentum transfer; the chemical processes within arcs; the arc system materials; and the arc jet design problems. The second section considers the problems of ion systems, the various ion sources, and the neutralization of ion beams. This section also looks into the basic ionization processes, the production and charging of heavy particles, the corrosive properties of cesium, and the ion-optical designs. The third section describes various plasma systems, including helical transmission lines, pulsed pinch accelerators, coaxial systems, and j x B accelerators. The theoretical analyses of these systems are briefly examined. The fourth section includes papers on flight testing of electric propulsion models, on vertical rocket probes, and on satellites, This section also discusses some advanced concepts in electric propulsion, such as air scooping during ascent through the atmosphere, systems design and optimization, and planetary and interplanetary missions. This book is of great value to physicists, space engineers and designers, as well as researchers in the fields of astronautics and aeronautics.
Download or read book Naval Weapons Center China Lake California written by and published by . This book was released on 1984 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Complexity of Computation written by Society for Industrial and Applied Mathematics and published by American Mathematical Soc.. This book was released on 1974 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Web version of an exhibition originally held at the National Portrait Gallery, Sept. 26, 1997-Jan. 4, 1998. This site provides information on the collection of portraits by the American photographer Mathew Brady (1823?-1896) in the Gallery's collection as well as biographical and professional information on Brady.
Download or read book Viking 75 Spacecraft Design and Test Summary Orbiter design written by Neil A. Holmberg and published by . This book was released on 1980 with total page 550 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biotechnology for Pulp and Paper Processing written by Pratima Bajpai and published by Springer. This book was released on 2018-02-14 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides the most up-to-date information available on various biotechnological processes useful in the pulp and paper industry. The first edition was published in 2011, covering a specific biotechnological process or technique, discussing the advantages, limitations, and prospects of the most important and popular processes used in the industry. Many new developments have taken place in the last five years, warranting a second edition on this topic. The new edition contains about 35% new material covering topics in Laccase application in fibreboard; biotechnology in forestry; pectinases in papermaking; stickies control with pectinase; products from hemicelluloses; value added products from biorefinery lignin; use of enzymes in mechanical pulping.
