Ein Finite-Volumen-Verfahren zur Lösung by Heiermann J. PDF

By Heiermann J.

A finite quantity approach has been constructed during this paintings for fixing the conservation equations of argon plasma flows in magnetoplasmadynamic self-field accelerators. those accelerators can be utilized for interplanetary spaceflight missions due to their excessive particular impulse and excessive thrust density, .Calculations for various nozzle geometries exhibit that the diffusion brought on by the electron strain drives the arc out of nozzle-type self-field accelerators and impacts the arc attachment at the anode considerably. In contract with the test it's been discovered fundamental explanation for plasma instabilities at excessive present settings is the depletion of density and cost companies in entrance of the anode due to the pinch effect.The calculated thrust facts agree good with experimental values, in order that the newly constructed process can be utilized for the layout and optimization of latest thrusters.

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Additional resources for Ein Finite-Volumen-Verfahren zur Lösung magnetoplasmadynamischer Erhaltungsgleichungen

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N x x l Duales Dreieck Tijk rx x x Duale Zelle i Torusquerschnittsfl¨ache ∆Ai Torusvolumen ∆Vi r ..... 1: Duale Zellen als Kontrollvolumina Duale Zellen an R¨andern (Abb. 2) haben die Randfl¨achenanteile ∆Ai,1 und ∆Ai,2 , die sich aus der Rotation der halben Kantenl¨angen der zugeh¨origen prim¨aren Dreiecksrandkanten ergeben.

M,i . . . . .. ... . ..... .. .. . ... ........ ... ... .... . ... . ..... ... ... ..... .. . . ... .. ... . . .. . ... m,k ... . ... . ... . .... ... . . ... .... ... ..... ... ... ... ... .... . . ... . ... ... ... ... ... ...... ................................................................... ... . . ...

6 FV–Diskretisierung der Schwerteilchenerhaltungsgleichungen Bei allen FV–Diskretisierungen wird im folgenden stets vom Gauß’schen Satz Gebrauch gemacht, der das Volumenintegral der Divergenz eines Vektors in den Fluß des Vektors durch die Volumenoberfl¨ache umwandelt: a · d∆Aωk . 39) + ωi ni f¨ ur eine duale Zelle ω, die von K Nachbarzellen umgeben ist, bedeutet FW EN O (xωk ) den Upwind–Fluß durch eine Zelloberfl¨ache ∆Aωk am Integrationspunkt xωk , wobei die links– und rechtsseitigen Werte an der Zellwand durch die WENO–Rekonstruktion berechnet werden.

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Ein Finite-Volumen-Verfahren zur Lösung magnetoplasmadynamischer Erhaltungsgleichungen by Heiermann J.


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