Abstract
The specific heat for constant pressure, constant volume and their ratio behind a strong shock wave in helium with initial pressures ofp 0=0·1 and 1·0 mm Hg have been calculated. At shock-velocities up to Mach 150 both ionizations have to be considered. Lowering of ionization potential and exitation energy can be neglected for this range. The specific heats show typical maxima as first found byMöglich, Riewe undRompe forc p of hydrogen.
The second part of this paper deals with a method of iteration applied to the Rankine-Hugoniot equations. Hence they can be evaluated continuously over the range of both ionizations including the lowering of ioniziation potential.
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Herrn ProfessorFucks danke ich für die Förderung dieser Arbeit. Herrn ProfessorCremer, Leiter des Rechenzentrums der Technischen Hochschule Aachen, sowie FräuleinKuhlmann und HerrnMommer, den letzteren für die Durchführung der numerischen Rechnungen, bin ich zu Dank verpflichtet.
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Artmann, J. Die spezifischen Wärmen hinter einer starken Stoßfront in Helium im Gleichgewichtszustand. Z. Physik 174, 376–382 (1963). https://doi.org/10.1007/BF01378612
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DOI: https://doi.org/10.1007/BF01378612