Feasibility Study of Magnetohydrodynamics Acceleration of Unseeded and Seeded Airflows

Adamovich, Igor V.; Rich, John Martin; Nelson, Gordon L.

doi:10.2514/2.410

Cited by 43 publications

(2 citation statements)

References 25 publications

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“…2, with the results of Fig. 10, the effective Joule heating factor is 0:11 0:02, which is in good agreement with the results of the Boltzmann equation solution [53], 0:09 in nitrogen at the reduced electric field of E=N 6 10 16 V cm 2 and 0:10 in air at E=N 5 10 16 V cm 2 . At these conditions, the effective MHD loading parameter (the ratio of the effective Joule heating and the Lorentz force work),…”

Section: A Experimentalsupporting

confidence: 88%

Repetitively Pulsed Nonequilibrium Plasmas for Magnetohydrodynamic Flow Control and Plasma-Assisted Combustion

Adamovich

Lempert

Nishihara

et al. 2008

Journal of Propulsion and Power

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This paper demonstrates significant potential of the use of high-voltage, nanosecond pulse duration, high pulse repetition rate discharges for aerospace applications. The present results demonstrate key advantages of these discharges: 1) stability at high pressures, high flow Mach numbers, and high-energy loadings by the sustainer discharge, 2) high-energy fractions going to ionization and molecular dissociation, and 3) targeted energy addition capability provided by independent control of the reduced electric field of the direct current sustainer discharge. These unique capabilities make possible the generation of stable, volume-filling, low-temperature plasmas and their use for high-speed flow control, nonthermal flow ignition, and gasdynamic lasers. In particular, the crossed pulsersustainer discharge was used for magnetohydrodynamic flow control in cold M 3 flows, providing first evidence of cold supersonic flow deceleration by Lorentz force. The pulsed discharge (without sustainer) was used to produce plasma chemical fuel oxidation, ignition, and flameholding in premixed hydrocarbon-air flows, in a wide range of equivalence ratios and flow velocities and at low plasma temperatures, 150-300 C. Finally, the pulser-sustainer discharge was used to generate singlet oxygen in an electric discharge excited oxygen-iodine laser. Laser gain and output power are measured in the M 3 supersonic cavity.

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Section: A Experimentalsupporting

confidence: 88%

Repetitively Pulsed Nonequilibrium Plasmas for Magnetohydrodynamic Flow Control and Plasma-Assisted Combustion

Adamovich

Lempert

Nishihara

et al. 2008

Journal of Propulsion and Power

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“…Such plasma forms in natural processes in astrophysics and upon strong explosions in the atmosphere. It is also widely utilized in various applications: plasma processing [1,2], plasma etching [3,4], plasma thruster [5], magnetohydrodynamic acceleration [6], electro-gasdynamic lasers [7] and others.…”

Section: Introductionmentioning

confidence: 99%

Kinetics of plasmachemical processes in the expanding flow of nitrogen plasma

Kadochnikov¹,

Loukhovitski²,

Starik³

2013

Phys. Scr.

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The extended state-to-state kinetic model, taking into account the possibility of the formation of non-Boltzmann distribution over the vibrational levels for different electronic states (X1Σ+g, A3Σ+u, B3Πg, a'1Σ−u and C3Πu) of N2 molecules in strongly nonequilibrium conditions, has been built. The numerical analysis of the processes in the expanding supersonic flow of primary equilibrium nitrogen plasma has demonstrated that disruption of thermodynamic equilibrium in a supersonic flow results in the formation of plateau type vibrational distribution both in the ground X1Σ+g and in the excited electronic states. It has been shown that the neglect of the disruption of thermodynamic equilibrium between vibronic states of N2 molecules and translational degrees of freedom can lead to significant errors in the populations of vibrational levels even in the ground state of the N2 molecule, as well as in the concentrations of charged species and in the electron and translational temperatures. The principal processes responsible for the formation of non-Boltzmann distribution over vibrational levels, both in the ground and in the excited electronic states of the N2 molecule, are carefully investigated. It is revealed that in the expanding supersonic flow of nitrogen plasma the population inversion at the (B3Πg,V ) → (A3Σ+u,V +n) transition with V >24 and n = 1, 2 can form.

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The attenuation of shock waves in a nonequilibrium gas

Zavershinskii

Kogan

2000

High Temp

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Feasibility Study of Magnetohydrodynamics Acceleration of Unseeded and Seeded Airflows

Cited by 43 publications

References 25 publications

Repetitively Pulsed Nonequilibrium Plasmas for Magnetohydrodynamic Flow Control and Plasma-Assisted Combustion

Repetitively Pulsed Nonequilibrium Plasmas for Magnetohydrodynamic Flow Control and Plasma-Assisted Combustion

Kinetics of plasmachemical processes in the expanding flow of nitrogen plasma

The attenuation of shock waves in a nonequilibrium gas

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