SCIENTIFIC AND TECHNICAL AEROSPACE REPORTS
A Biweekly Publication of the National Aeronautics and Space Administration
VOLUME 44, ISSUE 3 - February 10, 2006
02 AERODYNAMICS
Includes aerodynamics of flight vehicles, test bodies, airframe components and combinations, wings, and control surfaces.
Also includes aerodynamics of rotors, stators, fans, and other elements of turbomachinery.
For related information see also 34 Fluid Mechanics and Thermodynamics.
20060004889 Naval Postgraduate School, Monterey, CA USA
Aerodynamic Flow Control using a Variable Droop Leading Edge Airfoil
Chandrasekhara, M. S.; Tung, C.; Martin, P. B.; Oct. 1, 2004; 18 pp.; In English; Original contains color illustrationsReport No.(s): AD-A440840; No Copyright; Avail.: CASI: A03, Hardcopy
No abstract available.
Aerodynamic Characteristics; Aerodynamics; Airfoils; Fluid Flow; Leading Edges
20060005296 Purdue Univ., West Lafayette, IN USA
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Characteristics of the Contraction of the Boeing/AFOSR Mach-6 Quiet Tunnel
Borg, Matthew P.; Dec. 1, 2005; 105 pp.; In English; Original contains color illustrationsContract(s)/Grant(s): F49620-03-1-0030Report No.(s): AD-A441151; No Copyright; Avail.: CASI: A06, Hardcopy
The Boeing/AFOSR Mach-6 Quiet Tunnel continues to be developed to simulate the low noise of the free-flightenvironment. An investigation of the flow entering the contraction of this facility was necessary to determine whetherdisturbances in the driver tube are of sufficient amplitude to propagate downstream into the test section of the tunnel.Significant free convection was found in the nominally stagnant pre-run air of the contraction and leads to significantstratification of the air in the driver tube during the run. Two calibration methods were tested and used to compute mass-flowfluctuations in the contraction at a variety of locations and pressures. For regions near the center of the contraction, mass-flowfluctuations of 1.4% were marginally higher than Beckwith’s allowable criterion of 1% for settling-chamber noise. This maynot preclude quiet flow to the design conditions, since an aluminum surrogate nozzle recently provided quiet flow to 94 psia,2/3 of the design performance. DTIC
Aerodynamic Noise; Contraction; Free Flow; Hypersonic Speed; Hypersonics; Turbulence; Turbulent Flow; Wind TunnelModels; Wind Tunnel Tests; Wind Tunnels
20060005502 Air Force History Support Office, Bolling AFB, Washington, DC USA
The Hypersonic Revolution. Case Studies in the History of Hypersonic Technology. Volume III: The Quest for theOrbital Jet: The National Aero-Space Plane Program (1983-1995)
Schwelkart, Larry; Jan. 1, 1998; 474 pp.; In EnglishReport No.(s): AD-A441126; No Copyright; Avail.: CASI: A20, Hardcopy
Groucho Marx once said that 80% of success was just showing up. In a program with such lofty goals assending ajet aircraft into orbit, one might hope to define success in more demanding terms. Yet in many ways, the NationalAerospace Plane (NASP) program, which originated in the early 1980s with the intention of designing and fabricating ajetaircraft that could fly fast enough to attain orbital velocity, is considered a success by many of the participants.1 They contendthat by ‘showing up,’ NASP survived long enough to produce what many deem critical technologies for hypersonic flight (thatis, speeds above Mach 5, or roughly 3600 miles per hour), and it reinvigorated an interest in aerospace that was somewhatdormant (and certainly underfiinded) at the National Aeronautics and Space Administration (NASA). DTIC
Histories; Hypersonic Flight; Hypersonics; National Aerospace Plane Program; Technologies
20060005504 Air Force History Support Office, Bolling AFB, Washington, DC USA
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The Hypersonic Revolution: Case Studies in the History of Hypersonic Technology. Volume I: From Max Valier to Project PRIME (1924-1967)
Hallion, Richard P.; Jan. 1, 1998; 853 pp.; In English Report No.(s): AD-A441127; No Copyright; Avail.: CASI: A99, Hardcopy
The history of hypersonics teaches that faith in, and unquestioning acceptance of, a hypersonic future is akin to belief in the Second Coming: one knows and trusts that it will occur, but one can’t be certain when. That hypersonics is yet again in a period of renewal echoes a familiar theme in the history of hypersonic research and development. As programs have waxed and waned, the field has progressed through various cycles of growing interest and rising optimism followed by cancellation, pessimism, and slow rebuilding of interest. For example, at the time the first two volumes of The Hypersonic Revolution: Case Studies in the History of Hypersonic Technology were published, it appeared that the field was, at last, on the verge of achieving what had been its most long-sought goal: developing hardware--a genuine transatmospheric vehicle, the X-3O, that could take off from the earth under its own power (using air breathing propulsion) fly through the atmosphere into space, and then return through the atmosphere to land, and possible complementary European and Asian vehicles as well. DTIC
Histories; Hypersonic Flight; Hypersonics; Technologies
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