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Equatorial bubbles updrafting at supersonic speeds
Journal of Geophysical Research: Space Physics, 1992We present plasma and electric field observations from two satellite encounters with equatorial plasma bubbles updrafting at velocities of ∼2 km/s. These large, upward velocities are consistent with an adaptation of Chandrasekhar's model for the motion of plasma blobs supported against gravity by a magnetic field; that is, Vz ≈ −g.
Thomas L. Aggson +7 more
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Airscrews at Supersonic Forward Speeds
Aeronautical Quarterly, 1951SummaryThe flow past an airscrew rotating with uniform angular velocity in a uniform supersonic stream is considered from the point of view of axes fixed in the airscrew, the motion relative to these axes being steady. A linearised equation and boundary conditions are found for the potential of the disturbance flow caused by airscrews which produce ...
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Supersonic cracks break classical speed limit
Physics World, 2023Tensile cracks in brittle elastic materials can spread faster than the speed of sound – and faster than the laws of classical fracture mechanics say is possible, according to a team from Israel.
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High Supersonic Speed Wind Tunnel
Aircraft Engineering and Aerospace Technology, 1961ON Friday, March 24, 1961, the Minister of Aviation, Mr Peter Thorneyeroft, officially opened a new high supersonic speed wind tunnel at the Royal Aircraft Establishment, Bedford. This tunnel provides the final stage in the present plans for expansion of the wind tunnel facilities at Bedford, being capable of providing speeds from Mach 2.5 up to Mach 5
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Skin-friction measurement at supersonic speeds
AIAA Journal, 1970Skin friction measurement in supersonic flows by thin film heated element method, describing thermal boundary layer ...
F. K. OWEN, B. J. BELLHOUSE
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1952
Abstract : The mechanism of the doublet at supersonic speeds is described using elementary physical reasoning insofar as is possible. The cause of the infinities introduced into the equations by the differentiation process across the Mach cone is discussed.
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Abstract : The mechanism of the doublet at supersonic speeds is described using elementary physical reasoning insofar as is possible. The cause of the infinities introduced into the equations by the differentiation process across the Mach cone is discussed.
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Vortex Development on Slender Missiles at Supersonic Speeds
Journal of Spacecraft and Rockets, 1979A theoretical and experimental effort has been made to develop a vortex-prediction capability on circular and noncircular missiles at supersonic speeds. Predicted vortex patterns are computed by two linear-theory computer codes. One calculates the strengths and initial locations of the vortices, and the other calculates their trajectories.
J. ALLEN, M. DILLENIUS
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Panel flutter at low supersonic speeds
Journal of Fluids and Structures, 2012Abstract Flutter of panels can be of two possible types: single mode or coupled mode flutter. Coupled mode flutter has been thoroughly studied using piston theory, which represents air pressure acting on the plate at high Mach numbers. Single mode flutter cannot be studied using piston theory and requires potential flow theory or more complex ...
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What price supersonic speed? A design anatomy of supersonic transportation Part 1
The Aeronautical Journal, 2008AbstractThe first generation of supersonic commercial transportation has seen three serious attempts to arrive at an economically and environmentally viable aircraft. The US B2707-200/300 design was cancelled early before a prototype could emerge; the Russian Tu-144 design succeeded to become the first supersonic transport but spanned only a few years ...
B. Chudoba +3 more
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Properties of riblets at supersonic speed
Applied Scientific Research, 1989The properties of a riblet surface at a Mach number of 1.25 are described. Direct measurement has been made of the surface shear stress on a riblet surface attached to a skin-friction balance mounted beneath the turbulent boundary layer growing along a wall of the RAE 2 ft×1 1/2 ft variable density transonic wind tunnel.
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