MHD hypersonic flow control for aerospace applications

Petit, Jean-Pierre; Geffray, J.; David, Fabrice

doi:10.2514/6.2009-7348

Cited by 7 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Now from the paper [6] by Jean-Pierre Petit and Julien Geffray, 'MHD Hypersonic flow control for aerospace applications'. But what is MHD or magnetichydrodynamics, stands for magnetic fluid dynamics, is application of magnetic or electromagnetic fields round a disk-shaped hull of a craft, to ionize the air to create lift, much like a wing.…”

Section: Mhdmentioning

confidence: 99%

“…My experiment is to feed advanced waves into the capacitor on the possibility that the mass-shift of the capacitor might be shifted into the past. But here one applies this to MHD [6] craft or aerodynes. MHD is magnetohydrodynamics which means magnetic-fluiddynamics of surrounding the hull of a disk-shaped craft (aerodyne) in an electrical field, to create lift by the electromagnetic field ionizing the air to create lift, on the International Journal of Scientific Advances ISSN: 2708-7972 same principle as the way wings work.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Photographing the Past, Diffracting Advanced Energy, and Advanced Energy Applied to MHD

Maccini

2023

International Journal of Scientific Advances

View full text Add to dashboard Cite

I outline in this paper 4 experiments. The 1st experiment is exploiting the nature of advanced waves, which were first detected by Bajlo in 2017, that converge from infinity to a point on an antenna (absorber) with the possibility that the advanced waves may carry information from objects in the past (because the advanced waves are incoming waves from the past, which Bajlo regards as outgoing waves into the past). That if the waves carry information, one might be able to detect an image from the past. The 2nd experiment considers diffracting advanced waves or particles in a tunneling barrier. The 3rd experiment considers the combination of Takaaki Musha Honda’s experiment, of weight reduction by sending electrical AC/DC, pluses into a capacitor with my experiment of sending advanced waves into the capacitor on the possibility that the mass shift of the capacitor is shifted into the past, and applying this to the hull of MHD craft. The 4th experiment, or consideration, of Feynman’s disk paradox, of generating angular momentum from a static electrical field.

show abstract

Section: Mhdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photographing the Past, Diffracting Advanced Energy, and Advanced Energy Applied to MHD

Maccini

2023

International Journal of Scientific Advances

View full text Add to dashboard Cite

show abstract

“…The second-order entropy conditioned scheme developed in Dong et al [18,19] has been proven to be a highly accurate and robust procedure for solving the 3D Euler equations since it requires no adjustable parameters to satisfy the entropy condition. This scheme is used to solve Euler equations (1). The finite difference discretization of equation ( 1) is performed under a general curvilinear coordinate system , , ð Þ.…”

Section: Numerical Formulationmentioning

confidence: 99%

“…Research on magnetohydrodynamics (MHD) and its potential applications in the area of hypersonic technology has become increasingly popular in many countries. The computational and experimental studies indicate that the heat barrier resulting from shock waves in hypersonic flight, separation in the crossingshock boundary-layer interaction, and instabilitygrowth-rate modification, etc., can be controlled by MHD interactions [1][2][3][4]. In the early 1990s, Russia had proposed a new concept on combined propulsion system that consisted of a turbine and an MHD enhanced scramjet for hypersonic cruised aircraft, and established the AJAX program [5,6].…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional design and numerical simulation of magnetohydrodynamic controlled hypersonic inlets

Cao

2011

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

The purpose of this study is to perform numerical simulation for the design and optimization of three-dimensional magnetohydrodynamic (MHD) controlled hypersonic inlets. An airframe/propulsion integrated module was first established for a waverider-based hypersonic vehicle at design Mach number of 6. Using this generic configuration, an MHDbased technique for large-scale inlet flow control is studied at the off-designed Mach value of 8.5. The results indicate that the inlet mass flowrate can act as an optimization criterion. Using a proper value of mass flowrate, an MHD generator possessing reasonable design parameters can effectively restore the flow field shock structure, i.e. shock-on-lip condition and improves the flow field characteristics at the combustor entrance at higher Mach number than the design value. The results further reveal that the MHD effect on the flow with higher load factor helps to extract more electric power from the external MHD generator and also helps in improving the performance of the combustor entrance.

show abstract

“…How would these results change if the fluid is electrically conducting and is under the presence of a magnetic field? These questions are also of direct interest to several industrial magnetohydrodynamic (MHD) applications including MHD flow control schemes for hypersonic vehicles (Petit et al 2009), torpedo drag reduction with MHD boundary-layer control (Anderson & Wu 1971), MHD propulsion systems (Swallom et al 1991), etc. This work studies the minimum-drag shapes for a non-magnetic constantvolume solid body immersed in the uniform flow of an electrically conducting viscous incompressible fluid under the presence of a uniform magnetic field aligned with the undisturbed flow. It is particularly motivated by the fact that in this MHD problem, the drag for a non-magnetic sphere as a function of the Cowling number 1 S has a minimum at S = 1 and, remarkably, is non-smooth at S = 1 (see (Zabarankin 2011, fig.…”

Section: Introductionmentioning

confidence: 99%

Minimum-drag shapes in magnetohydrodynamics

Zabarankin

2011

Proc. R. Soc. A.

View full text Add to dashboard Cite

A necessary optimality condition for the minimum-drag shape for a non-magnetic solid body immersed in the uniform flow of an electrically conducting viscous incompressible fluid under the presence of a magnetic field is obtained. It is assumed that the flow and magnetic field are uniform and parallel at infinity, and that the body and fluid have the same magnetic permeability. The condition is derived based on the linearized magnetohydrodynamic (MHD) equations subject to a constraint on the body's volume, and generalizes the existing optimality conditions for the minimum-drag shapes for the body in the Stokes and Oseen flows of a non-conducting fluid. It is shown that for any Hartmann number M , Reynolds number Re and magnetic Reynolds number Re m , the minimum-drag shapes are fore-and-aft symmetric and have conic vertices with an angle of 2p/3. The minimum-drag shapes are represented in a function-series form, and the series coefficients are found iteratively with the derived optimality condition. At each iteration, the MHD problem is solved via the boundary integral equations obtained based on the Cauchy integral formula for generalized analytic functions. With respect to the equal-volume sphere, drag reduction as a function of the Cowling number S = M 2 /(Re m Re) is smallest at S = 1. Also, in the considered examples, the drag values for the minimum-drag shapes and equal-volume minimum-drag spheroids are sufficiently close.

show abstract

MHD hypersonic flow control for aerospace applications

Cited by 7 publications

References 12 publications

Photographing the Past, Diffracting Advanced Energy, and Advanced Energy Applied to MHD

Photographing the Past, Diffracting Advanced Energy, and Advanced Energy Applied to MHD

Three-dimensional design and numerical simulation of magnetohydrodynamic controlled hypersonic inlets

Minimum-drag shapes in magnetohydrodynamics

Contact Info

Product

Resources

About