Characteristics of a magnetogasdynamic diffuser under different modes of electric current switching |
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Authors: | R V Vasil’eva A V Erofeev T A Lapushkina S A Poniaev S V Bobashev D M van Wie |
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Institution: | (1) Ioffe Physicotechnical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia;(2) John Hopkins University, Laurel, Maryland 20723, USA |
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Abstract: | This paper elaborates upon a previous investigation into the influence of external electric and magnetic fields on a flow
through a supersonic diffuser. The aim of the present study is to correlate a change in the configuration of a shock wave
emerging near the diffuser inlet at magnetohydrodynamic interaction with the amount of force and energy actions and with total
pressure losses. For this purpose, the main parameters of the shock wave structure and the total pressure are measured at
the diffuser outlet when the flow is subjected to magnetic and electric fields of various strengths at different routes of
current passage. In the experiments, a shock tube with a supersonic nozzle is employed. The shock tube forms a flow behind
the shock wave reflecting from the end of the tube, which terminates in the nozzle. The diffuser is located directly downstream
of the nozzle. The investigation is carried out in xenon. The flow is subjected to external fields at the inlet of the diffuser.
The shock wave structure is visualized by frame sweeping of Schlieren patterns of the flow. The total pressure is measured
with a piezoelectric transducer located at the end of the channel. The results obtained make it possible to optimize the action
on the flow in terms of power consumption and total pressure losses for a given design of the diffuser. |
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