Magnetohydrodynamic Control on Hypersonic Aircraft Under "Ajax" Concept

Kuranov, Alexander; Sheikin, E.

doi:10.2514/2.3951

Cited by 52 publications

(17 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This result, however, does not yet demonstrate feasibility of large-scale MHD deceleration of supersonic flows, discussed in Ref. [6]. This would require analysis of other critical technical issues, such as sustaining magnetic field and low energy cost external ionization over large volumes of the flow, as well as boundary layer separation in a decelerating flow.…”

Section: -mentioning

confidence: 86%

“…Considerable effort has been made to demonstrate cold supersonic flow acceleration or deceleration by Lorentz force, with the main application being MHD flow control in hypersonic inlets [6]. Recent results demonstrate Lorentz force acceleration of a constricted discharge filament sustained near the test section wall in a cold M=3 air flow, up to velocities of 1.9 km/sec [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

MHD Flow Control and Power Generation in Low-Temperature Supersonic Flows

Nishihara

Rich

Lempert

et al. 2006

37th AIAA Plasmadynamics and Lasers Conference

View full text Add to dashboard Cite

The public reporting burden for this collecbon of information is esbmated to average 1 hour per response. including the time for reviewing instructions, searching existing data sources. galhenng and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden. Approved for public release; distribution unlimited. SUPPLEMENTARY NOTES ABSTRACTReport developed under STTR contract for topic AF05-TO1 6. Results of cold MHD flow deceleration and MHD power-generation experiments conducted at The Ohio State University are presented. MHD effect on the flow is detected from flow static-pressure measurements. The observed static-pressure change is due to the MHD interaction and not Joule heating of the flow in the crossed discharge. Comparison of experimental results with modeling calculations shows that the retarding Lorentz force increases the static-pressure rise produced by Joule heating of the flow, while the accelerating Lorentz force reduces the pressure rise. The experiments show that at the present conditions, the electric current in the MHD power-generation regime is very low, on the order of 1 mA. This is entirely due to the bottleneck effect of the discharge cathode layer at conditions where the MHD open voltage is significantly lower than the cathode-voltage fall. Modeling calculations demonstrate that (1) at the flow conductivities currently achieved in low-temperature MHD flows (a -0.1 mho/m), low open voltages reduce the MHD currents by more than two orders of magnitude, and (2) this effect cannot be circumvented by seeding the flow at feasible levels (-0.1%) or using electrodes with a high secondary-emission coefficient. SUBJECT TERMS STTR

show abstract

Section: -mentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

MHD Flow Control and Power Generation in Low-Temperature Supersonic Flows

Nishihara

Rich

Lempert

et al. 2006

37th AIAA Plasmadynamics and Lasers Conference

View full text Add to dashboard Cite

show abstract

“…In the last years, new applications of MHD generators to hypersonic aircrafts have been considered (see for example the papers of Petit and Geffray [2] and Sheikin and Kuranov [3]). The generated electricity can be used to power electromagnetic devices on board or to the so-called MHD bypass (i.e.…”

Section: Introductionmentioning

confidence: 99%

A simplified mathematical theory of MHD power generators

Carabineanu

2015

Analele Universitatii "Ovidius" Constanta - Seria Matematica

View full text Add to dashboard Cite

We present a simplified version of the Faraday magnetohydrodynamics (MHD) generators theory. The effect of the Loretz force against the fluid flow is neglected, whence it follows the uniform flow of the plasma. We use Lazȃr Dragoş's analytic solution for the electric potential and perform some numerical calculations in order to obtain the useful output power of a generator connected to an external resistive circuit.

show abstract

“…If the enthalpy extraction was not sufficient to avoid the need for a scramjet engine, the MHD power generator could still lower inlet temperatures to tolerable levels. As well the addition of a bypass system to further accelerate the exhaust gases could increase the specific thrust of the engine during off-design conditions and flow control [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Combined Magnetohydrodynamic and Geometric Optimization of a Hypersonic Inlet

Subbarao

Goss

2009

International Journal of Aerospace Engineering

View full text Add to dashboard Cite

This paper considers the numerical optimization of a double ramp scramjet inlet using magnetohydrodynamic (MHD) effects together with inlet ramp angle changes. The parameter being optimized is the mass capture at the throat of the inlet, such that spillage effects for less than design Mach numbers are reduced. The control parameters for the optimization include the MHD effects in conjunction with ramp angle changes. To enhance the MHD effects different ionization scenarios depending upon the alignment of the magnetic field are considered. The flow solution is based on the Advection Upstream Splitting Method (AUSM) that accounts for the MHD source terms as well. A numerical Broyden-Flecher-Goldfarb-Shanno-(BFGS-) based procedure is utilized to optimize the inlet mass capture. Numerical validation results compared to published results in the literature as well as the outcome of the optimization procedure are summarized to illustrate the efficacy of the approach.

show abstract

Magnetohydrodynamic Control on Hypersonic Aircraft Under "Ajax" Concept

Cited by 52 publications

References 4 publications

MHD Flow Control and Power Generation in Low-Temperature Supersonic Flows

MHD Flow Control and Power Generation in Low-Temperature Supersonic Flows

A simplified mathematical theory of MHD power generators

Combined Magnetohydrodynamic and Geometric Optimization of a Hypersonic Inlet

Contact Info

Product

Resources

About