Download or read book Development of Ambient Hypersonic Ground Testing written by E. C. Knox and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advanced Hypersonic Test Facilities written by Frank K. Lu and published by AIAA. This book was released on 2002 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ground Testing Facilities Requirements for Hypersonic Propulsion Development written by V. K. Smith and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 20th AIAA Advanced Measurement and Ground Testing Technology Conference written by and published by . This book was released on 1998 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Hypersonic Ground Test Facility written by Neil Bosmajian and published by . This book was released on 2000 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hypersonic Ground Test Capabilities for T and E Testing Above Mach 8 a Case where S and T Meets T and E written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Simulation of hypersonic flight in ground test and evaluation (T and E) facilities is a challenging and formidable task, especially to fully duplicate the flight environment above approximately Mach 8 for most all hypersonic flight systems that have been developed, conceived, or envisioned. Basically, and for many years, the enabling technology to build such a ground test wind tunnel facility has been severely limited in the area of high-temperature, high-strength materials and thermal protection approaches. To circumvent the problems, various approaches have been used, including partial simulation and use of similarity laws and reduced test time. These approaches often are not satisfactory, i.e. operability and durability testing for air-breathing propulsion development and thermal protection development of many flight systems. Thus, there is a strong need for science and technology (S and T) community involvement in technology development to address these problems. This paper discusses a specific case where this need exists and where significant S and T involvement has made and continues to make significant contributions. The case discussed will be an Air Force research program currently underway to develop enabling technologies for a Mach 8-15 hypersonic true temperature wind tunnel with relatively long run time. The research is based on a concept proposed by princeton University using radiant or beamed energy into the supersonic nozzle flow.
Download or read book Flight Testing of Airbreathing Hypersonic Vehicles written by John W. Hicks and published by . This book was released on 1993 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Enhancing U S Competitiveness written by United States. Congress. House. Committee on Science, Space, and Technology. Subcommittee on Technology, Environment, and Aviation and published by . This book was released on 1994 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1991 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book STAR written by and published by . This book was released on 1965 with total page 2216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Description and Flow Characterization of Hypersonic Facilities written by and published by . This book was released on 1994 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypersonic test facilities will continue to play a major role in the development of hypersonic vehicles. In the past, ground test facilities were often used to perform configuration parametric studies and/or to develop large databases. Future testing will emphasize understanding of fluid physics and validation of codes. Computational fluid dynamics (CFD) has made great progress in the past two decades, but the marriage of CFD and ground testing is clearly a reality today, and will become even more important in the future. One of the challenges for the experimentalist is to develop and utilize facilities that simulate hypersonic flight, and to provide the required data precision to validate CFD codes. This provides a brief review of facility fundamental considerations and simulation issues. It is clear that no one facility will meet the wide variety of test objectives; therefore, the test facilities span a range of size, run time, complexity, and operating cost. Representative facilities are described, as well as their test capabilities, flow quality, and deficiencies. Computational fluid dynamics (CFD), Ground testing, High-Enthalpy facilities, Aerodynamic testing, Aerothermal testing.
Download or read book Experimental Studies on Hypersonic Stagnation Point Chemical Environment written by and published by . This book was released on 2006 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Development of space transportation is a very challenging task. Hypersonic flight should be investigated in details to allow designing spacecraft according to the severe environment of their flight conditions. Typically during planetary re-entry, a strong bow shock takes place ahead of the vehicle detached from its nose. Across the shock a large amount of kinetic energy is converted into thermal energy. It results into a plasma flow which impinges on the vehicle wall. To sustain this important heat transfer the spacecraft must be equipped with suitable Thermal Protection System (TPS). Its role is essential, but its design is difficult due to the complexity of the heat-transfer phenomena. From this situation it could be understood that ground testing appear as a strong requirement for TPS design. However the development of high enthalpy facilities for hypersonic testing is a challenge in itself. When the investigations concern high temperature effects, and their consequences on TPS material, specific ground facilities have to be used allowing long time range and chemical reacting flows. Classically plasma wind tunnel are used: Arc-jet facilities in which supersonic testing in different configuration is available at very high power and very large scale, or Plasmatron facility offering usually a better chemical environment with subsonic testing. This lectures focus on this last type of facility and attends to present the use of such plasma wind tunnel to study the chemical environment of a re-entry flight as well as the catalytic properties of TPS material. It will deal with the methodology adapted for the Plasmatron testing, some aspects of the facility design, the development of the specific measurement techniques and the data processing in connection with appropriate CFD tools. It will finally concentrate on the application of this ground testing methodology to the determination of TPS properties in real flight conditions.
Download or read book Hypersonic Flight Testing written by and published by . This book was released on 1994 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: The challenges of hypersonic system development require a combination of integrated ground testing, flight testing, and computational/simulation approaches. This report addresses the role of flight testing in the triad of development approach and is sub-divided into three parts: Propulsion, Aerothermal and Extrapolation of ground test data to flight. The reasons for propulsion flight test are illustrated by specific mini-case studies. The second part reviews some of the fundamental issues of flight testing and provides an overview of the aerothermal techniques. Specific examples include heat-transfer gage measurements and some of the common problems that have been encountered. The third part of this report discusses the initial flights of the Space Shuttle which uncovered a number of differences between preflight aerodynamic predictions and actual flight data. Most notable among these discrepancies was for longitudinal trim during high-speed re-entry. To investigate these differences, several computer codes were applied to a modified Space Shuttle Orbiter to determine aerodynamic parameters over a wide range of conditions. Computations were carried out for wind tunnel conditions and flight conditions to assess Mach number, real gas, and viscous effects on the reentry aerodynamics of the orbiter. flight-testing, Aerothermal techniques, Hypersonic vehicles, Computational Fluid Dynamics (CFD) simulations, High-speed re-entry.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Review and Evaluation of the Air Force Hypersonic Technology Program written by National Research Council and published by National Academies Press. This book was released on 1998-09-05 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was undertaken in response to a request by the U.S. Air Force that the National Research Council (NRC) examine whether the technologies that underlie the concept of a hypersonic, air-launched, air-breathing, hydrocarbon-fueled missile with speeds up to Mach 81 can be demonstrated in time to be initially operational by 2015. To conduct the study, the NRC appointed the Committee on Review and Evaluation of the Air Force Hypersonic Technology Program, under the auspices of the Air Force Science and Technology Board.
Download or read book Development of Test Facilities for Studies in Hypersonic Range written by Henry Halle and published by . This book was released on 1961 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hypersonic missiles re-entering the atmosphere are subjected to severe aerodynamic heating. In order to closely simulate these severe thermal conditions for testing laboratory models, a program was undertaken which consisted of the design, construction, and testing of (1) an airstabilized ac arc, and (2) a vacuum and cooling system to evacuate the high-temperature plasma generated by the arc. Stable and reliable operation was achieved with the ac powered arc, but it was relatively inefficient in utilizing the available power. The vacuum and cooling system to receive, cool, and exhaust to the atmosphere the plasma generated by a 1.5-megawatt airstabilized dc arc makes testing possible with a low-density plasma and subatmospheric stagnation pressure and permits the heat flux to be adjusted independently of the enthalpy difference. (Author).
Download or read book A Survey of Existing Hypersonic Ground Test Facilities North America written by C. E. Wittliff and published by . This book was released on 1987 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the past several years there has been a significant increase in the number of programs involving hypersonic vehicles, resulting in a resurgance of interest in experimental testing in hypersonic wind tunnels. Unfortunately, there are far fewer such facilities operating now than there were 10 or 15 years ago. The primary purpose of this paper is to survey the current status of hypersonic wind tunnels in North America and to describe their performance characteristics. As a part of this survey a comparison is drawn to the number and type of hypersonic wind tunnels that were active in the 1960's and 1970's relative to the current situation. Emphasis is placed on hypersonic aerodynamic and aerothermal testing and related areas. In surveying the hypersonic wind tunnels that are active in North America, all but one are located in the USA. There is a gun tunnel in Canada that will be reactivated this year.
