The potentialities of MHD control for improving scramjet performance

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

doi:10.2514/6.1999-4969

Cited by 26 publications

(13 citation statements)

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“…At off-design Mach numbers, energy addition to or extraction from the flow, using plasmas and various magnetohydrodynamic devices, can be considered as an alternative to a variable geometry inlet [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. An important advantage of plasma-based methods of inlet and isolator control is their flexibility, controllability, and fast response.…”

Section: Scramjet Inlet Control By Plasma-induced Heating: the Reversmentioning

confidence: 99%

“…Weakly ionized plasmas together with electric and magnetic fields can offer interesting opportunities for flight performance enhancement by using energetic effects (energy addition and extraction and volumetric body forces) in place of traditional variable-geometry aerodynamic methods [2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Weakly ionized plasmas together with electric and magnetic fields can offer interesting opportunities for flight performance enhancement by using energetic effects (energy addition and extraction and volumetric body forces) in place of traditional variable-geometry aerodynamic methods [2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Weakly Ionized Plasmas in Hypersonics: Fundamental Kinetics and Flight Applications

Macheret

2005

AIP Conference Proceedings

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Articles you may be interested inEffect of dielectric barrier discharge plasma actuators on non-equilibrium hypersonic flows A high-order numerical method to study hypersonic boundary-layer instability including high-temperature gas effects Phys. Fluids 23, 084108 (2011); 10.1063/1.3614526Modeling of the plasma generated in a rarefied hypersonic shock layer A kinetic-theory approach for computing chemical-reaction rates in upper-atmosphere hypersonic flows Abstract. The paper reviews some of the recent studies of applications of weakly ionized plasmas to supersonic/hypersonic flight. Plasmas can be used simply as means of delivering energy (heating) to the flow, and also for electromagnetic flow control and magnetohydrodynamic (MHD) power generation. Plasma and MHD control can be especially effective in transient off-design flight regimes. In cold air flow, nonequilibrium plasmas must be created, and the ionization power budget determines design, performance envelope, and the very practicality of plasma/MHD devices. The minimum power budget is provided by electron beams and repetitive high-voltage nanosecond pulses, and the paper describes theoretical and computational modeling of plasmas created by the beams and repetitive pulses. The models include coupled equations for non-local and unsteady electron energy distribution function (modeled in forwardback approximation), plasma kinetics, and electric field. Recent experimental studies at Princeton University have successfully demonstrated stable diffuse plasmas sustained by repetitive nanosecond pulses in supersonic air flow, and for the first time have demonstrated the existence of MHD effects in such plasmas. Cold-air hypersonic MHD devices are shown to permit optimization of scramjet inlets at Mach numbers higher than the design value, while operating in self-powered regime. Plasma energy addition upstream of the inlet throat can increase the thrust by capturing more air (Virtual Cowl), or it can reduce the flow Mach number and thus eliminate the need for an isolator duct. In the latter two cases, the power that needs to be supplied to the plasma would be generated by an MHD generator downstream of the combustor, thus forming the "reverse energy bypass" scheme. MHD power generation on board reentry vehicles is also discussed.

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Section: Scramjet Inlet Control By Plasma-induced Heating: the Reversmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Weakly Ionized Plasmas in Hypersonics: Fundamental Kinetics and Flight Applications

Macheret

2005

AIP Conference Proceedings

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“…It is possible that these goals will be achieved only by developing airbreathing RLVs. Because of the higher performance and lower mass fraction, 4 airbreathing RLVs offer the promise of greater robustness and safety than rocket-powered RLVs. Therefore, they should afford lower operating costs.…”

Section: Space Accessmentioning

confidence: 99%

“…Improvement in any portion of the process can benefit the military commander. There are certainly opportunities to improve the C 4 ISR system as a significant portion of the process. These improvements are a top priority in the Air Force today, and we can expect major advances in the next 10 to 20 years.…”

Section: Surface Attackmentioning

confidence: 99%

“…As an example of hypersonic missile applications against a TCT, Figure 25 presents a future notional timeline for the deployment of a theater ballistic missile (TBM). Also shown is the AHM reaction time and time of flight, assuming a circa 2020 C 4 ISR system that can search and identify the TBM in a few minutes as it moves out of hiding. The AHM requirement is to engage the TBM before it launches.…”

Section: Surface Attackmentioning

confidence: 99%

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Why and Whither Hypersonics Research in the US Air Force

Fuchs¹,

Chaput²,

Frost³

et al. 2000

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This report summarizes the deliberations and conclusions of the 2000 Air Force Scientific Advisory Board (SAB) study on Why and Whither Hypersonics Research in the US Air Force. In this study the committee describes the operational requirements of a hypersonic system and presents a research program for air breathing hypersonics to meet the operational requirements. We define a program resulting in an operational air breathing hypersonic space launch system in about 2025. This program includes several exit ramps and potential options. The exit ramps would lead to either an operational rocket-based reusable launch system or continuation of the expendable course the Air Force is currently on. A Red Team Panel was part of the study team and provides alternatives to the air breathing hypersonic systems to meet the operational requirements. The study results represent an outstanding collaboration between the scientific and operational communities and among government, industry, and academia. The Study committee wishes to thank the many individuals who contributed to the deliberations and the report, as listed in Appendix A. In addition to Scientific Advisory Board members, many ad hoc members devoted their time. The team would also like to thank all the organizations that gave presentations to our panel and hosted us as listed in Appendix D. The Air Force Academy provided outstanding technical writers-Capt Susan Hastings, Capt David Jablonski, and Capt Matthew Murdoughwho provided fantastic support in preparing this report. Lt Col Dan Heale from the Air Force Research Laboratory served as an outstanding executive officer for the Investment Panel as well as provided a liaison role with Air Force Materiel Command. The Study committee would like to recognize the SAB Secretariat and support staff, in particular Maj Doug Amon, and the ANSER team, especially Ms Kristin Lynch, who provided invaluable administrative and logistical assistance in pulling together the myriad of inputs into this final report. Their efforts are greatly appreciated. Finally, this report reflects the collective judgment of the SAB and hence is not to be viewed as the official position of the United States Air Force.

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