Flow-field modelization and simulation on pulsed chemical laser

David Zeitoun; J. Vuillon

doi:10.1117/12.144626

4 May 1993 Flow-field modelization and simulation on pulsed chemical laser

David Zeitoun, J. Vuillon

Proceedings Volume 1810, 9th International Symposium on Gas Flow and Chemical Lasers; (1993) https://doi.org/10.1117/12.144626
Event: Ninth International Symposium on Gas Flow and Chemical Lasers, 1992, Heraklion, Greece

Abstract

In previous works a numerical study of the unsteady two dimensional flow in the cavity of an excimer laser has been presented. In this paper, the numerical method based on a finite difference scheme, associated with a flux transport algorithm (SHASTA-FCT method), is developed for computing the flow in a pulsed chemical laser. The gas mixture contains SF6 and the evolution of the ratio of specific heats (gamma) as a function of temperature must be included in the numerical approach. The elliptic shape of the lower electrode leads to a convergent divergent laser cavity and allows a better damping of pressure waves due to the non-uniformity of the energy deposition. From a comparison between numerical and experimental results on the evolution of the wall pressure at a given position it is possible to come up to the real shape of the energy deposition. In addition, the numerical simulation of the flow is carried out over two interpulse time to get the description of the flow field in a multidischarge configuration.

Citation Download Citation

David Zeitoun and J. Vuillon "Flow-field modelization and simulation on pulsed chemical laser", Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); https://doi.org/10.1117/12.144626

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