Results 251 to 260 of about 67,962 (296)
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Science, 2012
Chemistry In qualitative terms, chemists have become adept at predicting how reaction probabilities depend on the relative dispositions of two colliding reagents. For instance, if a reactive site is bounded by a large fragment and a small one, the collision partner is more likely to make it past the small one.
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Chemistry In qualitative terms, chemists have become adept at predicting how reaction probabilities depend on the relative dispositions of two colliding reagents. For instance, if a reactive site is bounded by a large fragment and a small one, the collision partner is more likely to make it past the small one.
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Missile Loads at High Angles of Attack
Journal of Spacecraft and Rockets, 1991study, side forces were presented for various conditions over a range of angles of attack up to 90 deg. Presented here is a comparison of the experimental data with Missile DATCOM predictions for the normal forces.
Richard M. Howard, Archibald S. Dunn
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The hemisphere-cylinder at an angle of attack
28th Aerospace Sciences Meeting, 1990The investigation of the flow over a cylinder with a hemispherical nose at an angle of attack is presented. Experiments were conducted in a 6 ft x 6 ft low-turbulence tunnel. The focus of this research is the separated region as well as the evaluation and testing of a new diagnostic tool, a fiber-optic laser-Doppler probe.
D. TELIONIS, G. JONES
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On the Stability of Supercavity with Angle of Attack
Proceedings of the 8th International Symposium on Cavitation, 2012SUMMARY Research on the supercavity stability is not only the focus question as a physical phenomenon in the field of the supercavity flows, is but also the basis of studying the control of the supercavitating flows and their vehicles. Angle of attack (AOA) is one of the most important control variables that can maintain and control the supercavity ...
Wang Zou +4 more
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High angle of attack hypersonic aerodynamics
5th Applied Aerodynamics Conference, 1987A new aerodynamics force model is presented which is based on modified Newtonian theory and empirical correlations. The algebraic model was developed for complete vehicles from take off to orbital speeds and for large angles of attack. Predictions are compared to results for a wind tunnel model at a Mach number of 20, and the full scale Shuttle Orbiter
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Effect of Angle of Attack on Hypersonic
AIAA Journal, 1997An experimental investigation of the effects of angle of attack on hypersonic boundary-layer stability on a ared-cone model was conducted in the low-disturbance Mach-6 Nozzle-Test-Chamber Facility at NASA Langley Research Center. Hot-wire anemometry diagnostics were applied to identify the boundary-layer instability mechanisms that lead to transition.
Glen P. Doggett +2 more
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Aircraft Engineering and Aerospace Technology, 1960
THE main criterion for controlling the flight path of an aircraft should, of course, be the angle of attack. However, it is only recently that instruments have become available which could provide pilots with continuous angle of attack information. The demand for an instrument which could provide this information accurately has now been met by the ...
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THE main criterion for controlling the flight path of an aircraft should, of course, be the angle of attack. However, it is only recently that instruments have become available which could provide pilots with continuous angle of attack information. The demand for an instrument which could provide this information accurately has now been met by the ...
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An optical angle of attack sensor
International Congress on Instrumentation in Aerospace Simulation Facilitie, 1990A major source of transonic and supersonic wind-tunnel test data uncertainty are angle-of-attack-measurement errors caused by unknown sting and balance deflections under load. Since dynamic loads in pressurized or cryogenic wind tunnels generally exceed those in conventional low-speed atmospheric wind tunnels, the need to account for these distortions ...
T.K. McDevitt, F.K. Owen
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Angle-of-attack control of spinning missiles
Mechanics and Control of Flight Conference, 1974The application of controlled wind-fixed pitch and yaw moments to control the coning angle of a spinning missile is described. The open-loop response to applied pitch and yaw moments is derived, and the closed-loop behavior of an angle-of-attack control system is analyzed.
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Prediction of Separation Angles Induced by Sharp Fins with Attack Angle
AIAA Journal, 2001Introduction G LANCING shock-wave/turbulent-boundarylayer interaction, in which an oblique shock wave glances across a boundary layer along an adjacent wall (Fig. 1), constitutes one of the most important phenomena of three-dimensional interference.
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