Results 181 to 190 of about 2,387,085 (259)
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Adding Value at Hypersonic Speed
45th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2009In the test and evaluation (T&E) world, obtaining critical ground-test data requires that the effort be approached as a value-added task. By acquiring the ground-test data faster and cheaper, value is added to the overall flight system development program. At the Arnold Engineering Development Center (AEDC), a culture of maximizing the value of all T&E
Dusty Vaughn +2 more
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Sublimation of graphite at hypersonic speeds
AIAA Journal, 1965In this paper, a new theoretical model is presented for the sublimation of graphite at hypersonic flight speeds. The aerothermochemical interactions between dissociated air and graphite are treated by means of a nine-component model, including O, O2, N, N2, CO, CO2, C, C3, and CN.
Leon M. GlLBERT, SlNCLAIRE M. Scala
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Maneuvering Capabilities of Hypersonic Airframes
AIAA SCITECH 2023 Forum, 2023The objective of this paper is to document weight dependent trends in the maneuverability and agility of extremely high-speed aircraft. At high true airspeeds, the maneuverability and agility may be impacted by fundamental structural, aerodynamic and ...
Timothy T. Takahashi
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Disturbance and Phase Speed Measurements for Shock Tubes and Hypersonic Boundary-Layer Instability
, 2016Measurements and calculations of the phase speed of disturbances observed in a small shock tube are made, via cross-correlation of successive frames from focusing schlieren videography and double focused laser differential interferometry. The efficacy of
J. Jewell +4 more
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A Review of High-Speed Aircraft Stability and Control Challenges
AIAA AVIATION 2023 Forum, 2023This paper identifies key stability and control screening parameters needed to design general-purpose high-supersonic and hypersonic aircraft. A review of ground test, computation and flight test data of the rocket propelled Bell X-2, North American X-15,
Timothy T. Takahashi +2 more
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Phugoid oscillations at hypersonic speeds
AIAA Journal, 1965A theoretical analysis is made of the long-period (phugoid) oscillations of a lifting vehicle in hypersonic flight up to and including orbital speeds in any atmosphere. These oscillations correspond to a direct exchange between the kinetic energy and the potential energy along an oscillating flight path governed primarily by the trimmed steady-state ...
E. V. Laitone, Y. S. Chou
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Oscillation of Bow-shock Waves at Hypersonic Speeds [PDF]
43rd Fluid Dynamics Conference, 2013 Bow shock oscillation, which could have strong influences on the boundary layer transition especially in the stagnation region of re-entering capsule configurations, has been experimentally investigated with high speed shlieren imaging and fast response pressure and temperature fluctuation measurement in the stagnation region. Results indicate that the
Keisuke Fujii +3 more
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Experimental investigation of separated flow over a cavity at hypersonic speed.
, 1969Flow characteristics and wall heat transfer in separated flow region of annular cavity at free stream hypersonic speed and high gas ...
Mansop Hahn
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Plume effects at hypersonic speeds
1992A 7° semi-angle blunted cone has been tested at a Mach number of 8.2 in an intermittent hypersonic wind tunnel. The Reynolds number based on cone base-diameter was 2.8×105. The heat transfer rate distribution was measured along the cones surface and schlieren pictures were taken of the whole flow field.
J. L. Stollery +2 more
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Film cooling effectiveness on a large angle blunt cone flying at hypersonic speed
, 2005Effectiveness of film cooling technique to reduce convective heating rates for a large angle blunt cone flying at hypersonic Mach number and its effect on the aerodynamic characteristics is investigated experimentally by measuring surface heat-transfer ...
N. Sahoo +4 more
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