Download or read book Studies of Low Density Supersonic Jets written by N. Abuaf and published by . This book was released on 1966 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of axial and radial velocity distributions in axisymmetric free jets of pure gases and binary gas mixtures are reported. Results are compared with extensions of the kinetic theory approach developed by Hamel and Willis and by Edwards and Cheng. The use of binary gas mixtures to produce molecular beams in the 1-10 ev range is described. Measurements of diffusive separation of mixtures in free jets are reported and compared with the theoretical predictions of Zigan and Sherman for nearly continuum flow. (Author).
Download or read book U S Supersonic Commercial Aircraft written by National Research Council and published by National Academies Press. This book was released on 1997-08-25 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Aeronautics and Space Administration (NASA) is currently developing advanced technologies to form the foundation for the next breakthrough in civil aviation: an economically viable, environmentally acceptable supersonic transport. NASA's High Speed Research Program works in conjunction with industry to identify and address critical technological challenges to initiating commercial development of a practical supersonic transport. The key technical areas investigated are engine emissions, fuel efficiency, service life, and weight; community noise; aircraft range and payload; and weight and service life of airframe structures. Areas of particular interest include the ability of technologies under development to meet program goals related to noise, emissions, service life, weight, range, and payload. This book examines aircraft design requirements, assesses the program's planning and progress, and recommends changes that will help the program achieve its overall objectives.
Download or read book The Supersonic Transport written by Langley Research Center and published by . This book was released on 1960 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sonic Booms Resulting from Extremely Low altitude Supersonic Flight Measurements and Observations on Houses Livestock and People written by Charles W. Nixon and published by . This book was released on 1968 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Hypersonics written by BALLMAN and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: These three volumes entitled Advances in Hypersonics contain the Proceedings of the Second and Third Joint US/Europe Short Course in Hypersonics which took place in Colorado Springs and Aachen. The Second Course was organized at the US Air Force Academy, USA in January 1989 and the Third Course at Aachen, Germany in October 1990. The main idea of these Courses was to present to chemists, com puter scientists, engineers, experimentalists, mathematicians, and physicists state of the art lectures in scientific and technical dis ciplines including mathematical modeling, computational methods, and experimental measurements necessary to define the aerothermo dynamic environments for space vehicles such as the US Orbiter or the European Hermes flying at hypersonic speeds. The subjects can be grouped into the following areas: Phys ical environments, configuration requirements, propulsion systems (including airbreathing systems), experimental methods for external and internal flow, theoretical and numerical methods. Since hyper sonic flight requires highly integrated systems, the Short Courses not only aimed to give in-depth analysis of hypersonic research and technology but also tried to broaden the view of attendees to give them the ability to understand the complex problem of hypersonic flight. Most of the participants in the Short Courses prepared a docu ment based on their presentation for reproduction in the three vol umes. Some authors spent considerable time and energy going well beyond their oral presentation to provide a quality assessment of the state of the art in their area of expertise as of 1989 and 1991.
Download or read book Commercial Supersonic Technology written by National Research Council and published by National Academies Press. This book was released on 2002-02-16 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: High-speed flight is a major technological challenge for both commercial and business aviation. As a first step in revitalizing efforts by the National Aeronautics and Space Administration (NASA) to achieve the technology objective of high-speed air travel, NASA requested the National Research Council (NRC) to conduct a study that would identify approaches for achieving breakthroughs in research and technology for commercial supersonic aircraft. Commercial Supersonic Technology documents the results of that effort. This report describes technical areas where ongoing work should be continued and new focused research initiated to enable operational deployment of an environmentally acceptable, economically viable commercial aircraft capable of sustained supersonic flight, including flight over land, at speeds up to approximately Mach 2 in the next 25 years or less.
Download or read book Development of a Low Density Jet Flow Apparatus written by Nicholas Edward Smith and published by . This book was released on 2010 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: An apparatus was designed and constructed to study supersonic fluid flow in a low temperature and low pressure environment similar to the same conditions associated with near space. The apparatus allows the visualization of supersonic flows through an annular nozzle using a shadowgraph system. The flow system that creates supersonic flows is capable of producing pulsating jets at virtually any frequency. This thesis includes details of design of a near space jet flow apparatus that is capable of producing low temperature and low pressure environment for studying annular jets. The annular jets are produced from a nozzle that may be later incorporated on near space vehicle. After testing, it was discovered that the apparatus was capable of producing low temperatures and low pressures, but the results were inconsistent with a near space environment. The nozzle being studied has a blocking ratio of 0, 0.5 and 0.75. For each blocking ratio, the flow is choked, producing a constant mass flow rate. The theoretical and actual thrust were calculated using propulsion equations. The experimental results were compared to the theoretical, isentropic results. The jet length was also measured as a reference for vehicle design limitations. It was found that the maximum experimental thrust coefficients for a nozzle with blocking ratios of zero, 0.5 and 0.75 were calculated to be 0.430, 0.439, and 0.537 respectively. All maximum thrust coefficients occur at an ambient pressure of 0.5 kPa.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Reference Publication written by and published by . This book was released on 1977 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supersonic Combustion Studies at Low Density Conditions written by James E. Drewry and published by . This book was released on 1969 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of supersonic combustion as related to propulsive systems for high Mach number, high altitude flight is described. A method of laboratory simulation is employed which is considered to be suitable for fundamental studies of diffusional-controlled supersonic combustion under conditions approaching those of actual flight. A numerical analysis of the mixing and combustion processes for an axisymmetric hydrogen-air ducted flow system was carried out, using a computer code based upon boundary layer concepts and including the effects of finite-rate chemistry. A limited parametric study of the combustor flow field was made for a Mach number range of 1.5 to 2.5 for the injected air stream. Hydrogen injection is central and parallel to the air stream and is assumed to occur sonically. A matched pressure condition between the fuel and air streams is assumed to exist at the combustor inlet. Inlet static pressures in the range of 0.1 to 0.2 atmospheres were considered. Results of the parametric study indicated the inlet conditions required to achieve auto-ignition within a reasonable combustor length. Based on the numerical data obtained, a mixing and combustion chamber was designed and fabricated for the performance of experimental tests under conditions closely matching those of the numerical study. Experimental data from a number of laboratory tests in which supersonic combustion was obtained are presented and discussed. (Author).
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1957 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt: NSA is a comprehensive collection of international nuclear science and technology literature for the period 1948 through 1976, pre-dating the prestigious INIS database, which began in 1970. NSA existed as a printed product (Volumes 1-33) initially, created by DOE's predecessor, the U.S. Atomic Energy Commission (AEC). NSA includes citations to scientific and technical reports from the AEC, the U.S. Energy Research and Development Administration and its contractors, plus other agencies and international organizations, universities, and industrial and research organizations. References to books, conference proceedings, papers, patents, dissertations, engineering drawings, and journal articles from worldwide sources are also included. Abstracts and full text are provided if available.
Download or read book Los Alamos Science written by and published by . This book was released on 1983 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Essential Guide to Supersonic Passenger Aircraft written by National Ae Space Administration (Nasa) and published by . This book was released on 2019-07-05 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book reproduces important NASA, FAA, and other government documents, reports, and studies about the history and current state of supersonic passenger aircraft and SST travel. Updated through June 2019 with the latest information, there is extensive technical coverage of the ongoing NASA Low Boom Flight Demonstrator X-59 QueSST (LBFD) Project, a new X-plane that will test its quiet supersonic technologies by flying over communities in the United States. X-59 is designed so that when flying supersonic, people on the ground will hear nothing more than a quiet sonic thump - if anything at all.Contents: NASA Low Boom Flight Demonstrator X-59 QueSST (LBFD) Project * Part One: Overview * Part Two: Budget Presentation * Part Three: X-59 Life Support and Crew Escape System Design Challenges * Part 4: Zoom without the Boom * Part 5: Human Response to Sonic Booms * Part 6: Supersonic Passenger Flights / 2018 Research Report * Part 7: FAA Fact Sheet - Supersonic Flight * Part 8: What Happened to the American SST?Four decades have passed since the first trans-oceanic supersonic passenger flight took off from London Heathrow Airport in 1976. Subsequently, more than 2.5 million passengers flew supersonically until British Airways and Air France took the Concorde out of service in 2003. Although no supersonic passenger aircraft have flown since then, aviation enthusiasts, aircraft and parts manufacturers, airlines, and some Members of Congress have expressed interest in restarting supersonic air travel. Several U.S. startup companies are now developing supersonic commercial and business jets. The major issues affecting the introduction of supersonic aircraft appear to remain the same as in the Concorde era-how to translate technological advances into commercial ventures that are economically viable and acceptable to regulators and the public. Gaining international consensus and approvals to fly supersonically over other countries besides the United States may be a critical element in determining the market viability of future civil supersonic aircraft designs. International agreements would also need to address permissible conditions for supersonic flight operations over water and over polar regions that have opened up to civil aircraft operations over the past decade and offer shorter flights between the United States and Asia. Companies currently developing SSTs have stated that they envision flight ranges of about 4,000 to 6,000 nautical miles. These ranges would comfortably allow for flights between much of the east coast of the United States and key European destinations like London and Paris, with typical time savings of around two hours. However, several trans-Pacific routes, routes from western U.S. cities to Europe, and flights from the United States to Africa or the Middle East would require refueling stops. Developers envision that, even with hour-long service stops to take on fuel, the time savings could be substantial, typically cutting about one-third off of total travel time.The revival of interest in supersonic aircraft is the result of technological advances in materials, airframe and engine designs, and aircraft manufacturing that would be able to give the aircraft longer range through improved fuel efficiency and substantial weight savings with advanced composites and aerodynamics. Denver-based Boom Technology has announced plans to test a supersonic 2-seat demonstrator by the end of 2019, and aims to deliver its first supersonic aircraft to an airline as early as 2025. In November 2016, Virgin Group, an airline operator, took purchase options for 10 of Boom's proposed Mach 2.2 aircraft. Japan Airlines (JAL) invested $10 million in Boom and took purchase options on 20 planes in December 2017.
Download or read book Bibliography of Mass Spectroscopy Literature for 1970 written by and published by . This book was released on 1972 with total page 900 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Independent Offices Appropriation Bill for 1949 written by United States. Congress. House. Appropriations and published by . This book was released on 1948 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Air Force Research Resum s written by and published by . This book was released on with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeroacoustics of Flight Vehicles written by Harvey H. Hubbard and published by . This book was released on 1991 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
