Results 181 to 190 of about 1,519 (231)
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Technology Development for High Speed/Hypersonic Applications
AIAA/CIRA 13th International Space Planes and Hypersonics Systems and Technologies Conference, 2005The United States Air Force (USAF) and National Aeronautics and Space Administration (NASA) have jointly sponsored a study of technology development requirements for high speed/hypersonic airbreathing systems in preparation for initiating a National Aerospace Initiative (NAI) program.
Paul Hagseth +3 more
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Aerodynamic analysis of a high-speed aircraft from hypersonic down to subsonic speeds
Materials Research Proceedings, 2023Abstract. Unmanned flying-test bed aircraft are fundamental to experimentally prove and validate next generation high-speed technologies, such as aeroshape design, thermal protection material and strategy; flight mechanics and guidance-navigation and control. During the test, the aircraft will encounter realistic flight conditions to assess accuracy of
G. Pezzella, A. Viviani
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Pitch-damping coefficients at hypersonic speeds.
AIAA Journal, 1968Equation (A6) may be recognized as the Mathieu equation; two of the zones of parametric resonance determined by this equation are shown in Fig. 6 (zones A and B in the figure). Such zones define regions where the solutions of Eq. (A6) exhibit an exponential growth of the form e^. The iso-ju lines shown in the figure connect points of equal growth rate,
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A transonic experiment at hypersonic speed
AIAA Journal, 1964Cylindrically blunted wedges were tested in a hotshot tunnel at various angles of attack at a Maeh number of about twenty. The geometry was so arranged that the sonic point occurred either on the nose or much further downstream on the corner terminating the body, depending on angle of attack.
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High Speed and Hypersonic Science and Technology
41st AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2005Throughout modern history, aviation and, most recently, space have been pivotal to this nation’s ability to defend freedom and democracy. Over the years our foundational science and technology efforts have focused upon building strong aeronautics and space capability independently.
Michael Richman +2 more
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Boundary layer transition on swept cylinders at hypersonic speeds
Fluid Dynamics Conference, 1995We present boundary-layer transition data on swept cylinders in hypersonic flow that were obtained in the hypersonic Ludwieg-tube wind tunnel of DLR. Experiments were conducted at M∞ = 5.0 and 6.9 for three swept cylinders with and without end plates and sweep angles of 30, 45, and 60 deg, respectively.
Akira Murakami +2 more
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Control effectiveness of a jet-slender body combination at hypersonic speeds
14th Applied Aerodynamics Conference, 1996The effects of jet control on the aerodynamic characteristics, performance, and stability of a 5-deg semiangle slender cone missile configuration are studied. Tests were made in the Cranfield University College of Aeronautics hypersonic gun tunnel using both sharp and blunted cones.
Kontis, Konstantinos, Stollery, JL
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Oscillation of Bow-shock Waves at Hypersonic Speeds
43rd Fluid Dynamics Conference, 2013Bow 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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Toward High Speed: Supersonic and Hypersonic Flight
1991Just like that of trains and automobiles, the speed of aircraft has increased with time. Indeed, aircraft have raced ahead to make the most substantial progress in the shortest time. This is shown in Figure 10.1, where an exponential increase of cruising speed with time up to about 1960 is apparent.
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High-speed sequential deposition of photoactive layers for organic solar cell manufacturing
Nature Energy, 2022Christoph J Brabec
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