Scramjet with MHD control under "Ajax" concept - Physical limitations

Brichkin, D.; Kuranov, Alexander; Sheikin, E.

doi:10.2514/6.2001-381

Cited by 9 publications

(1 citation statement)

References 2 publications

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“…The concept of on-board power extraction from a scramjet flow path has been investigated relative to both energy bypass applications and auxiliary power generation [96][97][98][99][100][101][102][103][104][105][106][107][108]. Energy bypass applications involve extraction of significant flow energy upstream of the combustion process using an MHD power extraction system with re-introduction of the power into the propulsive stream downstream of the combustor using an MHD flow acceleration system.…”

Section: Inlet Shock Controlmentioning

confidence: 99%

Plasmas in high speed aerodynamics

Bletzinger¹,

Ganguly²,

Wie³

et al. 2005

J. Phys. D: Appl. Phys.

292

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A review is presented of the studies in the former Soviet Union and in the USA of the mutual interactions of plasmas and high speed flows and shocks. There are reports from as early as the 1980s of large changes in the standoff distance ahead of a blunt body in ballistic tunnels, significantly reduced drag and modifications of travelling shocks in bounded weakly ionized gases. Energy addition to the flow results in an increase in the local sound speed that leads to expected modifications of the flow and changes to the pressure distribution around a vehicle due to the decrease in local Mach number. The critical question was, did a plasma provide a significant energy multiplier for the system? There have been a large number of experimental studies on the influence of a weakly ionized plasma on relatively low Mach number shocks and inherently also on the influence of the shock on the plasma. This literature is reviewed and illustrated with representative examples. The convergence through more controlled experiments and improved modelling to a physics understanding of the effects being essentially due to heating is outlined. It is demonstrated that the heating in many cases is global; however, tailored experiments with positive columns, dielectric barrier discharges and focused microwave plasmas can produce very localized heating. The latter appears more attractive for energy efficiency in flow control. Tailored localized ionization and thermal effects are also of interest for high speed inlet shock control and for producing reliable ignition for short residence time combustors, and work in these areas is also reviewed.

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Section: Inlet Shock Controlmentioning

confidence: 99%

Plasmas in high speed aerodynamics

Bletzinger¹,

Ganguly²,

Wie³

et al. 2005

J. Phys. D: Appl. Phys.

292

View full text Add to dashboard Cite

show abstract

Magnetohydrodynamic Simulations of Hypersonic Flow over a Cylinder Using Axial‐ and Transverse‐Oriented Magnetic Dipoles

Guarendi

Chandy

2013

The Scientific World Journal

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Numerical simulations of magnetohydrodynamic (MHD) hypersonic flow over a cylinder are presented for axial- and transverse-oriented dipoles with different strengths. ANSYS CFX is used to carry out calculations for steady, laminar flows at a Mach number of 6.1, with a model for electrical conductivity as a function of temperature and pressure. The low magnetic Reynolds number (≪1) calculated based on the velocity and length scales in this problem justifies the quasistatic approximation, which assumes negligible effect of velocity on magnetic fields. Therefore, the governing equations employed in the simulations are the compressible Navier-Stokes and the energy equations with MHD-related source terms such as Lorentz force and Joule dissipation. The results demonstrate the ability of the magnetic field to affect the flowfield around the cylinder, which results in an increase in shock stand-off distance and reduction in overall temperature. Also, it is observed that there is a noticeable decrease in drag with the addition of the magnetic field.

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Atmospheric Cruise Flight Challenges for Hypersonic Vehicles Under the Ajax Concept

Kuranov¹,

Korabelnikov²

2008

Journal of Propulsion and Power

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Scramjet with MHD control under "Ajax" concept - Physical limitations

Cited by 9 publications

References 2 publications

Plasmas in high speed aerodynamics

Plasmas in high speed aerodynamics

Magnetohydrodynamic Simulations of Hypersonic Flow over a Cylinder Using Axial‐ and Transverse‐Oriented Magnetic Dipoles

Atmospheric Cruise Flight Challenges for Hypersonic Vehicles Under the Ajax Concept

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