Zur numerischen Beschreibung rotationssymmetrischer wandstabilisierter Lichtbogenkonfigurationen

A method is outlined which gives a numerical describtion for some configurations of axially symmetrical constricted electric arcs. For this purpose the equations of single fluid model of plasma physics are decoupled in such a way that only the heat flux potential, the axial velocity, the radial velocity, the average axial pressure gradient, and the average axial electric field have to be calculated simultaneously considering a given set of boundary conditions. In this paper the method is applied to the Koppelmann arc. In addition the paper reports upon some experiences in applying this method to the computation of further arc configurations.     

Zur theoretischen Beschreibung zylindersymmetrischer modulierter Lichtbögen

In this paper properties and dependence upon parameters of electric d.c. arcs with a.c. components are investigated. Expanding older theories analytical solutions of the basic equations of the one fluid modell are given for this problem using an extended Bessel modell and numerical calculations are made. Thereby the exact equations determine dependences upon parameters in limiting cases. The obtained results are compared with experimental data given in literature. The good agreement shows the validity of the applied methods.     

Beschreibung von Verweilzeitverteilungen bei Anwendung stabiler Isotope als Indikatoren

Eine Gleichung zur Berechung von Verweilzeitspektren in einem System hintereinandergeschalteter idealer Rührkessel bei Eingabe des Indikators in Form eines Rechteckimpulses wird hergeleitel. Die Anwendung dieser Gleichung für den Fall einer Markierung mittels stabiler Isotope als Indikatoren in chemischen Reakton und Apparaten wird diskutiert.