Numerical analysis of magnetohydrodynamic accelerator performance with diagonal electrode connection

Anwari, Makbul; Sakamoto, Nobuomi; Hardianto, Triwahju; Kondo, Junichi; Harada, Nobuhiro

doi:10.1016/j.enconman.2005.10.008

Cited by 15 publications

(9 citation statements)

References 7 publications

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“…The fluid dynamic equations for heavy particles are given by the conservation equation for mass, momentum and energy including MHD effects as follows [6], [10], [13]:…”

Section: A the Equation Of Mhdmentioning

confidence: 99%

“…Faraday, Hall, and diagonal type. The previous work about MHD accelerator performance with different electrode connections has been conducted [4][5][6][7][8][9][10]. From the studies, we knew that the Faraday type configuration has the best acceleration efficiency and the diagonal type configuration could also has the same acceleration efficiency as a Faraday type.…”

Section: Introductionmentioning

confidence: 99%

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Numerical analysis of MHD accelerator using nonequilibrium air plasma for space propulsion

Anwari

Qazi

Sukarsan

2010

2010 the 2nd International Conference on Computer and Automation Engineering (ICCAE)

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Numerical analyses of Magnetohydrodynamic (MHD) accelerator using nonequilibrium air plasma are outlined in this paper. Composition of simulated air plasma consists of seven species, N 2 , N, O 2 , O, NO, NO + and e -. The Magnetohydrodynamic Augmented Propulsion Experiment (MAPX) channel designed by NASA is used in this simulation. The MacCormack scheme is used to solve the set of differential equations of MHD approximations. Characteristics of nonequilibrium air plasma as a working gas are shown. Numerical results show the fundamental characteristic and propulsion performance of MHD accelerator using diagonal electrode connection with constant diagonal angle setting 55 o .

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“…The fluid dynamic equations for heavy particles are given by the conservation equation for mass, momentum and energy including MHD effects as follows [6], [10], [13]:…”

Section: A the Equation Of Mhdmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical analysis of MHD accelerator using nonequilibrium air plasma for space propulsion

Anwari

Qazi

Sukarsan

2010

2010 the 2nd International Conference on Computer and Automation Engineering (ICCAE)

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“…In a diagonal generator, the solution of (3) is required to satisfy the two subsidiary conditions (6) and (7). From (1) and (7), the author can derive the following equation: By applying the solution to (1) and the generalized Ohm's law, the author can find the values of E x and E y .…”

Section: Numerical Methods For Subsidiary Conditionsmentioning

confidence: 99%

“…In addition, while the end effects in the Faraday-type generator have been analyzed in fair detail [4][5][6], the end effects in the diagonal-type require further analysis [7][8][9]. Thus, the author has investigated influences of the output electrodes' arrangement and the attenuation of the magnetic induction along the generator channel on the current, as well as potential distributions near the entrance and exist exit of the diagonal-type MHD channel when physical quantities in the channel are assumed to be uniform.…”

Section: Introductionmentioning

confidence: 99%

Numerical Calculations and Analyses in Diagonal Type Magnetohydrodynamic Generator

Kien¹

2013

Journal of Electrical Engineering and Technology

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-This paper examines the effects of magnetic induction attenuation on current distribution in the exit regions of the Faraday-type, non-equilibrium plasma Magnetohydrodynamic (MHD) generator by numerical calculation using cesium-seeded helium. Calculations show that reasonable magnetic induction attenuation creates a very uniform current distribution near the exit region of generator channel. Furthermore, it was determined that the current distribution in the middle part of generator is negligible, and the output electrodes can be used without large ballast resistors. In addition, the inside resistance of the exit region and the current concentration at the exit electrode edges, both decrease with the attenuation of magnetic flux density. The author illustrates that the exit electrodes of the diagonal Faraday-type, non-equilibrium plasma MHD generator should be arranged in the attenuation region of the magnetic induction, in order to improve the electrical parameters of the generator.

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“…The results confirmed that the best performance was obtained by setting a constant diagonal angle. 13,14) In previous studies, the proof of the principal experiment of the MHD accelerator was demonstrated by using a pulsed-power discharge and a model rocket engine. The results indicated that the thrust efficiency of the pulsed-MHD accelerator improved when the cross-section of electrode decreased.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Current Distribution and Thrust in Diagonal Pulsed Magnetohydrodynamic Accelerator

Promson

Sugawara

Takahashi

et al. 2018

Trans. Japan Soc. Aero. S Sci.

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This study aims to investigate the incremental thrust in a diagonal magnetohydrodynamic (MHD) accelerator as a function of the number of segmented electrodes, the applied magnetic-flux density, and the different setting of diagonal angle. The peak incremental thrust obtained from the numerical result was agreement with that of the experimental result. For understanding the characteristics of current vector distribution in a diagonal MHD accelerator, we calculated the current vector as the function of a number of segmented electrodes, the applied magnetic-flux density and the different setting of diagonal angle. The simulations showed the current vector distribution inside the MHD channel as well as the current flow crossed into tungsten wires as a diagonal connection of the MHD channel. From these numerical simulations, the tilt angle of current vector distribution was changed by Faraday current in the MHD channel, which was controlled by the magnetic field.

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Numerical analysis of magnetohydrodynamic accelerator performance with diagonal electrode connection

Cited by 15 publications

References 7 publications

Numerical analysis of MHD accelerator using nonequilibrium air plasma for space propulsion

Numerical analysis of MHD accelerator using nonequilibrium air plasma for space propulsion

Numerical Calculations and Analyses in Diagonal Type Magnetohydrodynamic Generator

Numerical Study of Current Distribution and Thrust in Diagonal Pulsed Magnetohydrodynamic Accelerator

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