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Prediction Of The Pressure Fluctuations Associated With Maneuvering Reentry Weapons
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Book Synopsis Prediction of the Pressure Fluctuations Associated with Maneuvering Reentry Weapons by : Anthony L. Laganelli
Download or read book Prediction of the Pressure Fluctuations Associated with Maneuvering Reentry Weapons written by Anthony L. Laganelli and published by . This book was released on 1984 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental program was conducted at the AEDC von Karman facility, Tunnels A and B, in which acoustic pressure fluctuation data were acquired on a 7 degree half-cone-angle model featuring a control surface. The objective was to define the aeroacoustic environment applicable to re-entry vibration response analysis for both ballistic and maneuvering vehicles. Wind tunnel measurements were obtained at Mach 4 and 8 for several values of freestream Reynolds number and model angle of attack. Stationary zones of laminar, transitional, and turbulent flow over the model were achieved. Acoustic data were reduced to rms fluctuating pressure, and power and cross-power spectral densities. Results were normalized using local boundary layer parameters for comparison with previous high speed measurements. The present study re-examined the aeroacoustic environment prediction capability relative to compressible flow conditions. Moreover, boundary layer characteristic lengths and velocities were reviewed in order to develop normalization procedures required for development of appropriate aeroacoustic scaling laws. It was determined that fluctuating pressure characteristics described by incompressible theory as well as empirical correlations could be modified to a compressible state through a transformation function. In this manner, compressible data were transformed to the incompressible plane where direct use of more tractable prediction techniques are available for engineering design analyses.
Book Synopsis Prediction of Pressure Fuctuations Associated with Maneuvering Re-entry Weapons by : Anthony L. Laganelli
Download or read book Prediction of Pressure Fuctuations Associated with Maneuvering Re-entry Weapons written by Anthony L. Laganelli and published by . This book was released on 1977 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental program was conducted at the AEDC vonKarman facility, Tunnels A and B, in which acoustic pressure fluctuation data were acquired on a 7 degree half-cone-angle model featuring a control surface. The objective was to define the aeroacoustic environment applicable to re-entry vibration response analysis for both ballistic and maneuvering vehicles. Wind tunnel measurements were obtained at Mach 4 and 8 for several values of freestream Reynolds number and model angle of attack. Stationary zones of laminar, transitional, and turbulent flow over the model were achieved. Acoustic data were reduced to rms fluctuating pressure, and power and cross-power spectral densities. Results were normalized using local boundary layer parameters for comparison with previous high speed measurements. The present study re-examined the aeroacoustic environment prediction capability relative to compressible flow conditions. Moreover, boundary layer characteristic lengths and velocities were reviewed in order to develop normalization procedures required for development of appropriate aeroacoustic scaling laws. It was determined that fluctuating pressure characteristics described by incompressible theory as well as empirical correlations could be modified to a compressible state through a transformation function. In this manner, compressible data were transformed to the incompressible plane where direct use of more tractable prediction techniques are available for engineering design analyses.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Notices of Changes in Classification, Distribution and Availability by :
Download or read book Notices of Changes in Classification, Distribution and Availability written by and published by . This book was released on 1983 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fluctuating Pressure Loads for Hypersonic Vehicle Structures by : Henry G. Lew
Download or read book Fluctuating Pressure Loads for Hypersonic Vehicle Structures written by Henry G. Lew and published by . This book was released on 1991 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation was conducted to determine the ability to predict acoustic loads on supersonic/hypersonic structures with attached and separated flows. These techniques, which are based on laws governing boundary layer flow and shock physics, provide scaling parameters to extrapolate ground test results to flight conditions and can be used for the design process. It was determined that efficient, thin aerodynamic control surfaces generally produce weak shock/ boundary layers interactions where the rms pressure levels are not significantly augmented over attached flow levels. The exception to these findings include: (1) corner flow (inlet and stabilizers); (2) bow shock interaction (inlet and stabilizer); and (3) shock on shock/boundary layer (cowl/inlet, bow shock/inlet, and bow/inlet/cowl). Other potential interactions that may cause problems have been identified as: (1) axial offset (non-common intersection of two planes); (2) shock interaction with laminar boundary layers; (3) angle of attack effects; and (4) viscous approach flow along ramp leading to the inlet. An experimental program is recommended to address these issues; in particular for M> 3 where acoustic data does not exist. These experiments should be conducted in a facility that allows for preliminary test runs to ensure desired results. The WRDC Mach 3 and Mach 12 facilities are recommended for a Phase II investigation. Results of the Phase I and II efforts will provide the ability to design structures subject to complex flow interactions such as the National AeroSpace Plane.
Book Synopsis A Collection of Technical Papers: Structural dynamics II by :
Download or read book A Collection of Technical Papers: Structural dynamics II written by and published by . This book was released on 1991 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fluctuating Pressure Loads Under High Speed Boundary Layers by :
Download or read book Fluctuating Pressure Loads Under High Speed Boundary Layers written by and published by . This book was released on 1987 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis DGLR/AIAA 14th Aeroacoustics Conference by : Hanno Heller
Download or read book DGLR/AIAA 14th Aeroacoustics Conference written by Hanno Heller and published by . This book was released on 1992 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of an Aeroacoustic Methodology to Evaluate Heatshield Material Performance by : A. L. Laganelli
Download or read book Development of an Aeroacoustic Methodology to Evaluate Heatshield Material Performance written by A. L. Laganelli and published by . This book was released on 1982 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental program was conducted in the AFWAL Mach 6 and AEDC shock Tube facilities in which acoustic fluctuating pressure data were acquired on flat plate TWCP specimens featuring smooth and rough surfaces. The TWCP specimens were instrumented with five Gulton microphones. The microphones placed in the model consisted of flush, ported, and backface (blind hole) locations. Several l/d ported orifices were examined as well as depths from the boundary layer surface for the backface gages. The AEDC tests were structured to examine optimum ported orifices prior to the AFWAL Mach 6 tests. The TWCP specimens were exposed to turbulent boundary layer conditions at tunnel stagnation pressures of 700, 1400, and 2100 psi with a total temperature of 1100 deg. R, respectively. A correlation was developed for the ported hole sensors that can be related to the flush mounted sensors. Characterizing the backface (blind hole) gages with surface mounted sensors will require further data interpretation due to vibration. In general, rough walls augmented the acoustic energy levels as expected. A biased rough pattern (20 deg, angled to flow) indicated that acoustic measurements could be used as a diagnostic technique to determine the surface characteristics of TWCP ablation patterns.
Book Synopsis AIAA 12th Aeroacoustics Conference by :
Download or read book AIAA 12th Aeroacoustics Conference written by and published by . This book was released on 1989 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AIAA 84-0101 - AIAA 84-0150 written by and published by . This book was released on 1984 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :American Society of Mechanical Engineers. Multiphase Flow Committee Publisher : ISBN 13 : Total Pages :194 pages Book Rating :4.:/5 (318 download)
Book Synopsis Laminar Turbulent Boundary Layers by : American Society of Mechanical Engineers. Multiphase Flow Committee
Download or read book Laminar Turbulent Boundary Layers written by American Society of Mechanical Engineers. Multiphase Flow Committee and published by . This book was released on 1984 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 92-3986 - 92-4014 written by and published by . This book was released on 1992 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Earl Arthur Thornton Publisher :AIAA (American Institute of Aeronautics & Astronautics) ISBN 13 : Total Pages :576 pages Book Rating :4.3/5 (91 download)
Book Synopsis Thermal Structures and Materials for High-speed Flight by : Earl Arthur Thornton
Download or read book Thermal Structures and Materials for High-speed Flight written by Earl Arthur Thornton and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 1992 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text presents recent research and development in aerothermodynamics, advanced light metals and composites, thermal structures, materials performance and failure criteria, and intelligent processing of materials, as they relate to high-speed flight. Researchers and designers of aerospace vehicles for high-speed flight, as well as materials scientists, should find this text valuable.
Download or read book Proceedings written by and published by . This book was released on 1990 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis The Future of the U.S. Intercontinental Ballistic Missile Force by : Lauren Caston
Download or read book The Future of the U.S. Intercontinental Ballistic Missile Force written by Lauren Caston and published by Rand Corporation. This book was released on 2014-02-04 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: The authors assess alternatives for a next-generation intercontinental ballistic missile (ICBM) across a broad set of potential characteristics and situations. They use the current Minuteman III as a baseline to develop a framework to characterize alternative classes of ICBMs, assess the survivability and effectiveness of possible alternatives, and weigh those alternatives against their cost.
