Last edited by Dozilkree
Saturday, July 18, 2020 | History

2 edition of Magnetic hypersonic flow near the stagnation point at low Reynolds number. found in the catalog.

Magnetic hypersonic flow near the stagnation point at low Reynolds number.

S. Y. Chen

Magnetic hypersonic flow near the stagnation point at low Reynolds number.

by S. Y. Chen

  • 283 Want to read
  • 35 Currently reading

Published by Rand Corporation in Santa Monica, Calif .
Written in English

    Subjects:
  • Magnetohydrodynamics.,
  • Aerodynamics, Hypersonic.,
  • Reynolds number.

  • Edition Notes

    Includes bibliography.

    SeriesRand papers -- P-4142
    The Physical Object
    Paginationvi, 25 p.
    Number of Pages25
    ID Numbers
    Open LibraryOL16522638M

    pressure and density increase at the stagnation point with magnetic field contrary to previous predictions. This indicates that when Hall Reynolds number magnetic Reynolds number interaction parameter Schmidt number time Figure 1 depicts the changes in the hypersonic flow around a blunt. Turbulent Boundary Layer Somewhere downstream of the tran- sition point, the flow will be fully turbulent. At higher Reynolds number conditions, low altitude flights ~ considerable part of the hypersonic vehicle may be turbulent. Depending on the trajectory chosen, this turbulent.

    A wide variety of significant new analytical and numerical results in critical areas are presented, including point vortex dynamics, superconductor vortices, cavity flows, vortex breakdown, shock/vortex interaction, wake flows, magneto-hydrodynamics, rotary wake flows, and hypersonic vortex phenomena. The book will be invaluable for those. A point in a fluid flow where the flow has come to rest (i.e. speed is equal to zero adjacent to some solid body immersed in the fluid flow) is of special significance. It is of such importance that it is given a special name—a stagnation point. The static pressure at the stagnation point is of special significance and is given its own name.

      The second mode instability wave also influences the pressure in a hypersonic wind tunnel, the test conditions of which were: temperature = K, total pressure = atm, free-stream unit Reynolds number = × 10 6 /m, free-stream Mach number = The Reynolds number was kept low in order to resolve all the scales in the flow without using a sub-grid scale turbulence model. Computations were performed with three different grid resolutions, the finest grid having million cells. Because liquid metals have low magnetic Reynolds number, the induced magnetic.


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Magnetic hypersonic flow near the stagnation point at low Reynolds number by S. Y. Chen Download PDF EPUB FB2

Get this from a library. Magnetic hypersonic flow near the stagnation point at low Reynolds number. [S Y Chen; Project Rand (United States. Air Force); Rand Corporation.]. Get this from a library. Magnetic hypersonic flow near the stagnation point at low Reynolds number. [S Y Chen; Rand Corporation.].

This investigation extends existing low-Reynolds-number hypersonic flow theory to include magnetic-field effects. It is found that a small magnetic field of the order of Gauss or less reduces both heat transfer and skin friction in high-altitude flight, but increases shock standoff distance.

An investigation of the effects of wall temperature and of a magnetic field on the flow field at the stagnation point of blunt-nosed bodies in low-Reynolds-number hypersonic flow, with the intent of determining the possibility of using small magnetic fields to Cited by: where a s is a constant that can be calculated numerically.

This constant depends on the Reynolds number and the geometry of the system. Numerical values of a s as a function of the Reynolds number were presented by Dabros and van de Ven (, ) and Adamczyk et al.

().In those calculations, the geometry of the stagnation point was characterized by L/R; L and R are described. 25, (); 28, ()] for the stagnation point flow over an axisymmetric blunt body with an imposed dipole magnetic field. Numerical computations, which obviated many of the simplifications inherent in the Bush theory, were carried out employing the low magnetic Reynolds number.

In general the heliospheric magnetic field is rather weak and should not have significant effects apart from the region near the stagnation point where it may grow substantially. Nevertheless its topology is interesting and this in turn may have an effect on the entry and escape of low energy cosmic rays and other energetic particles.

Re m is the magnetic Reynolds number. Analysis of MHD flow near the critical point of. 13,14 The knowledge of the physics of the MHD-hypersonic flow interaction and the capability to. During hypersonic flow around a blunt-nosed body, the gas which passes through the bow shock is heated to high temperatures, where dissociation, ionization, and inverse phenomena (recombination) take place in the gas.

If an ionized gas moves in a magnetic field, the ponderomotive force which is set up changes the nature of its motion close to the stagnation point, decreasing the frictional. Hypersonic flow past a plane magnetic dipole with parallel orientation of the magnetic moment and free-stream velocity vectors for moderate magnetic Reynolds numbers Fluid Dynamics, Vol.

41, No. 3 Numerical Simulation of control of plasma flow with magnetic field for thermal protection in Earth reentry flight. The calculations were performed at the oncoming Mach number M-infinity = 4, constant jet stagnation pressure, and jet stagnation temperatures of, and K.

Magnetohydrodynamic-hypersonic viscous and inviscid flow near the stagnation point of a blunt body Technical Report Smith, M C ; Wu, C S Magnetic hypersonic flow near the stagnation point at low Reynolds number. You can write a book review and share your experiences. Other readers will always be interested in your opinion of the books you've read.

Whether you've loved the book or not, if you give your honest and detailed thoughts then people will find new books that are right for them. They then applied a Tesla magnetic field to the tube (this is about the strength of the magnetic field used in a typical MRI scanner), with the field aligned with the direction of blood flow, for one minute and found that the viscosity decreased by %.

This effect lasted for about 2 hours. Momentum and Heat Transfer in MHD Stagnation-Point Flow Over a Shrinking Sheet J. Appl. Mech (March, ) MHD Mixed Convection Boundary Layer Flow Toward a Stagnation Point on a Vertical Surface With Induced Magnetic Field.

the effect of magnetic parameter M, Reynolds number R e, Magnetic Reynolds number Rσ, Frequency parameter M1 on the velocity field and effect of frequency parameter M1 on mass flux is very prominent.

In order to analyze the flow field insensibly, figure (2) exhibits the velocity profile for different values of Reynolds number at M1= In this paper, the low Reynolds number flow of a single-phase in a strong magnetic field numerical study is presented for a wide range of Prandtl number values.

The flows of low Reynolds number values occur widely in industrial applications. Fluids such as tars, oils, or honeys are taken into account. Many of these substances are paramagnetics.

An analysis of the effects of a magnetic field on the flow past an infinite plate by the presence free-convection and mass transfer is considered when the magnetic Reynolds number of the flow is not small.

The influence of magnetic parameterM on the velocity and the skin-friction is discussed with the help of graphs, when the plate is being cooled by the free convection currents.

Because of the relatively low conductivity of liquid metals, the electrical currents generated by the fluid flow in a magnetic field are small enough for the magnetic field they generate to be neglected, i.e. the magnetic Reynolds number is much smaller than one. This means a large simplicification in analysis and numerical computation.

The thought behind magnetic field therapy is that certain problems happen because your magnetic fields are out of balance.

If you put a magnetic field near your body, it's believed things will go. Stagnation point heat flux in hypersonic high enthalpy flow Shock Waves, Vol. 2, No. 1 A comparative study of the Navier Stokes solvers with .demonstrated by moving a compass near the magnet.

The compass needle will line up along the direction of the magnetic field produced by the magnet, as depicted in Figure Figure Magnetic field produced by a bar magnet Notice that the bar magnet consists of two poles, which are designated as the north (N) and the south (S).Data are presented for the beat transfer coefficient at the stagnation point, and for its gradient in the stagnation point region.

The magnetic field strength required to accomplish an appreciable on of aerodynamic heating in hypersonic night is discussed for the .