Results 231 to 240 of about 82,587 (286)

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, Shoichi Tsuda, Noriaki Hirabayashi, Tadao Koyama   +3 more
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Phugoid oscillations at hypersonic speeds

AIAA Journal, 1965
A 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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Plume effects at hypersonic speeds

1992
A 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, N. P. B. Sperinck, P. Atcliffe   +2 more
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A transonic experiment at hypersonic speed

AIAA Journal, 1964
Cylindrically 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, 2005
Throughout 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.
Ronald Sega, Michael Richman, James Kenyon   +2 more
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Incipient separation on flared bodies at hypersonic speeds

The Aeronautical Journal, 1999
AbstractThe aerodynamic effectiveness of a cylinder-flare body at zero incidence under laminar and turbulent boundary-layer conditions has been studied experimentally. Two nose geometries, namely a 10° half-angle sharp cone and a hemisphere, were used.
Kontis, Konstantinos, Stollery, JL
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Technology Development for High Speed/Hypersonic Applications

AIAA/CIRA 13th International Space Planes and Hypersonics Systems and Technologies Conference, 2005
The 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.
Brian Zuchowski, Paul Hagseth, Sean Gillen, William Benner   +3 more
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Control effectiveness of a jet-slender body combination at hypersonic speeds

14th Applied Aerodynamics Conference, 1996
The effects of jet control on the aerodynamic characteristics, performance, and stability of a 5-deg semiangle slender conemissilecone guration arestudied. Tests were made in theCrane eld University College of Aeronautics hypersonicgun tunnelusingboth sharp and blunted cones. Thestudywasconducted at a Mach number of 8.2and a Reynolds number of 392 700,
Kontis, Konstantinos, Stollery, JL
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Simulation of an orbiter separation maneuver at hypersonic speed [PDF]

10th AIAA/NAL-NASDA-ISAS International Space Planes and Hypersonic Systems and Technologies Conference, 2001
The separation maneuver of an idealized twostage hypersonic vehicle is aerodynamical ly investigated. This paper gives a contribution to the calculation of unsteady flowfields arising from a realistic separation maneuver. The aerodynamic calculations are based on a finite-volume-method for solutions of the two-dimensional unsteady Eulerand Navier ...
Thomas Cvrlje, Boris Laschka
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ON THE OPTIMUM TRANSVERSAL CONTOUR OF A BODY AT HYPERSONIC SPEEDS [PDF]

, 1963
Abstract : In a previous paper (AD-296 177), the transversal contour of a slender body of a given length and base area was determined in such a way that the total drag (sum of the pressure drag and the friction drag) is a minimum. Directions were employed, and the analysis was confined to a body whose cross section is either a regular polygon or is ...
Angelo Miele, Gary R. Saaris
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