Numerical Study of Operation Mode Effects on Thrust-to-Power Ratio in Diagonal MHD Accelerator

Promson, Sariranya; Takahashi, Keníchi; Sasaki, Toru; Kikuchi, Takashi; Harada, Nobuhiro

doi:10.1541/ieejfms.139.428

Cited by 2 publications

(1 citation statement)

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“…The SG format is an adaptive exponential upwind style. When ψ i = ψ j , the electric field is zero, and there is only diffusion current inside the device without drift current [8]. At this time, the current given by the SG format is…”

Section: Scharfetter-gummel Formatmentioning

confidence: 99%

Numerical Simulation Analysis Mathematics of Fluid Mechanics for Semiconductor Circuit Breaker

Liu

2021

Applied Mathematics and Nonlinear Sciences

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The paper derives the current-voltage relationship in the semiconductor circuit breaker based on the equation of fluid mechanics which has application for safe and water access. Then, the paper proposes a Newton iterative method based on the finite element analysis method to solve the nonlinear algebraic equation relationship in the semiconductor circuit breaker. At the same time, the paper constructed a coupled numerical model based on the hydrodynamic equations and applied it to the pulse current prediction. Experiments have proved that the algorithm can realize large-scale open-circuit switching current forecast, and the algorithm has high efficiency and accuracy.

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Section: Scharfetter-gummel Formatmentioning

confidence: 99%

Numerical Simulation Analysis Mathematics of Fluid Mechanics for Semiconductor Circuit Breaker

Liu

2021

Applied Mathematics and Nonlinear Sciences

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Numerical Simulation of the Chemical Reaction on Faraday MHD Accelerator

Liao,

Zhu,

Wang

et al. 2024

Aerospace

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Magnetohydrodynamic (MHD) is one of the most promising novel propulsion technologies with the advantages of no pollution, high specific impulse, and high acceleration efficiency. As the carrier of this technology, the MHD accelerator has enormous potential for applications in hypersonic wind tunnels, supersonic ramjet engines, and deep space propulsion. In this study, a three-dimensional numerical simulation of an ideal Faraday magnetohydrodynamic (MHD) accelerator is conducted to assess the effect on performance with respect to applied potential and magnetic field intensity. The study is performed by employing a low magnetic Reynolds number MHD model coupled with a 7-component chemical reaction model to simplify the impact of real gas effects. The chemical reaction exhibits an increasing trend with rising applied potential and a decreasing trend with diminishing magnetic field strength. This variation influences the gas conductivity, subsequently affecting the velocity and thrust of the system. Specifically, at a magnetic field intensity of 2.0 T and an applied potential of 600 V, the accelerator exhibits maximum velocity and thrust growth rates of 18.6% and 59.8%, respectively.

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Numerical Study of Operation Mode Effects on Thrust-to-Power Ratio in Diagonal MHD Accelerator

Cited by 2 publications

References 20 publications

Numerical Simulation Analysis Mathematics of Fluid Mechanics for Semiconductor Circuit Breaker

Numerical Simulation Analysis Mathematics of Fluid Mechanics for Semiconductor Circuit Breaker

Numerical Simulation of the Chemical Reaction on Faraday MHD Accelerator

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