Results 291 to 300 of about 420,077 (309)

The Influence of Reynolds Number at High Mach Numbers

The Journal of the Royal Aeronautical Society, 1944
The experiments were carried out in the high speed wind tunnel at Guidonia on three brass spheres of 40, 60 and 80 mm. diameter, supported on rear spindles and on two steel cylinders of 15 and 30 mm. diameter respectively, which passed through the air jet.Both the total drag and pressure difference between the front stagnation point and a variable ...
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Plasma flow at a high Mach-number

Physics of Plasmas, 2013
Unlike the case of static magnetohydrodynamic (MHD) equilibria, where an expansion in large aspect ratio of toroidal devices is common, cases of MHD equilibria with flow are rarely treated this way, and when this is done the expansion tends to be only partial.
Bing Yu, Eliezer Hameiri
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Critical Mach numbers in classical magnetohydrodynamics

Journal of Geophysical Research: Space Physics, 1987
We use stationary point analysis to compute generalized critical Mach numbers for finite amplitude fast and slow shocks in classical MHD fluids. We pay particular attention to the case where the resistive and thermal conduction dissipation scale lengths are comparable and much larger than the viscous scale lengths.
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Hypersonic Flow at a Mach Number of 10

Journal of Applied Physics, 1951
Tests designed to produce supersonic streams at ten and sixteen times the local speed of sound are described. In contrast to the usual wind tunnel apparatus, a conical nozzle is used for the expansion section, and the supply pressure is varied throughout a wide range.
T. R. Small, F. K. Hill, I. D. V. Faro
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The Constant-Mach-number MHD generator

Journal of Fluid Mechanics, 1963
It is shown that the optimum design of duct in a magnetohydrodynamic generator is close to the one in which the flow Mach number remains constant. This constant-Mach-number generator is analysed in some detail and it is shown that the optimum Mach number can be defined to within a few percent. For a γ of 1·25, this optimum is near 0·85.
J. K. Wright, D. T. Swift-Hook
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On vortex sound at low Mach number

Journal of Fluid Mechanics, 1978
A transformation is described which relates the sound generated by low Mach number flow to the flow vorticity. For compact flow fields the apparent sound source is of quadrupole type and linear in the vorticity and therefore also linear in the flow velocity.
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Oscillating Airfoils at High Mach Number

Journal of the Aeronautical Sciences, 1953
A simple formula is given for the pressure distribution on an oscillating airfoil in two-dimensional flow at high Mach Number. The formula is expected to be reasonably accurate if the pressure on the surface remains within the range 0.2 to 3.5 times the mainstream pressure.
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Sound of fluids at low Mach numbers

European Journal of Mechanics - B/Fluids, 2013
Abstract The sound of fluid at low Mach number is a special research area that poses diverse applications not only in aerodynamics but also in bio-medical or biological fluids. The related Mach numbers are in the order of O ( 1 0 − 2 ) or even less and therefore the compressibility effects are substantially low but still play an ...
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Aeroelastic Instability at High Mach Number

Journal of the Aerospace Sciences, 1958
A brief discussion of the limitations of the piston theory is given. Using Lighthill's approach, the aerodynamic forces on oscillating airfoils are derived in a slightly different form to conform to the NACA practice and the familiar nondimensional flutter coefficients are tabulated for general double and single wedge and parabolic biconvex profiles ...
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Delocalization Mach Number in Aeroacoustics

Journal of the Korean Physical Society, 2007
Sang Han Park, Y. H. Yu, Jae-Woo Lee, Yung-Hwan Byun   +3 more
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