Numerical Study of the Effect of the Hall phenomenon on Supersonic flow in Magneto Hydro Dynamic Generator

Document Type : Research Article

Authors

1 Khatam University,tehran

2 Tarbiat modares University

Abstract

In the present research, the 2D supersonic airflow in a magneto-hydrodynamic generator is studied numerically and the effect of the Hall effect and the geometry on this flow is investigated. The flow is investigated as a perfect gas, steady and compressible with a low magnetic Reynolds number  in a two-dimensional channel with four pairs of electrodes and various geometries including channels with constant cross-section, convergent, divergent and divergent-constant sections as Faraday generator. The results displayed that the Mach angle in the direct channel is less than the other geometries and the output electric power and electrical efficiency and output pressure in the fixed channel are higher than other geometries. Also, Hall effect, which prevents deceleration of the plasma flow due to the magnetic field, reduced the output pressure and joule heating and increased electrical efficiency in all channels. To evaluate the Feasibility of the use of magneto-hydrodynamic generators in aerospace and missile industries, various results of the krypton gas flow and airflow, in particular Joule heating was compared. The comparison is done that if the joule heating of the krypton gas was less and the output electric power and electrical efficiency of this gas was more, it recommends as a proper gas for using in the mentioned industries.

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References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 4
July 2020
Pages 1037-1054

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