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The Speed of Sound and Mach Number Effects [PDF]

The Journal of the Royal Aeronautical Society, 1964
In a recent paper the suggestion is made that “it would be sensible when discussing the flow to use a Mach number based on the actual propagation velocity in the given circumstances.”This directs attention to the deeper question of whether or not a Mach number however defined is a rational parameter in terms of which to express effects of flow.In ...
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A Numerical Scheme for the Compressible Low-Mach Number Regime of Ideal Fluid Dynamics

Journal of Scientific Computing, 2016
Based on the Roe solver a new technique that allows to correctly represent low Mach number flows with a discretization of the compressible Euler equations was proposed in Miczek et al. (Astron Astrophys 576:A50, 2015).
W. Barsukow, P. Edelmann, C. Klingenberg, Fabian Miczek, F. Röpke   +4 more
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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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Electron Heating in Superhigh Mach Number Shocks [PDF]

Astrophysics and Space Science, 1988
Fluid and MHD models, as well as direct extrapolation of the Earth’s bow shock measurements in the high Mach number (HMN) range (3 ≤ M F ≤ 12) to the superhigh Mach number (SHMN) range (M F > 30–40) predict that the downstream electron pressure p e2 is only a negligible fraction of the Rankine-Hugoniot downstream pressure p 2, i.e., P e2/p 2 ≈ M F 2 ...
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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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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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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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Assessment of a ramjet engine for different Mach numbers

International Journal of Sustainable Aviation, 2017
The aim of this study is to determine optimum working of a generic ramjet engine. A thermodynamic analysis has been performed to evaluate three different ramjet flight conditions that have been obtained by using GasTurb. The results show that the entropy production in the diffusor (by the shocks) is of much importance as the combustor.
Ayaz, Süleyman Kagan, Altuntaş, Önder
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Low Mach Number Limit on Exterior Domains

Acta Mathematica Scientia, 2012
This paper is concerned with the low Mach number limit for the compressible Navier-Stokes equations in an exterior domain. We present here an approach based on Strichartz estimate defined on a non trapping exterior domain and we will be able to show the compactness and strong convergence of the velocity vector field.
DONATELLI, DONATELLA, MARCATI, PIERANGELO   +1 more
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Maximization of the critical mach number for lifting airfoils

Fluid Dynamics, 1993
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
D. A. Fokin, G. F. Avkhadiev, A. M. Elizarov   +2 more
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