Flowfield in a CO2-N2 gas-dynamics laser with staggered nozzles

D. Tarabelli; David Zeitoun; Michel P. Imbert

doi:10.1117/12.25915

1 February 1991 Flowfield in a CO2-N2 gas-dynamics laser with staggered nozzles

D. Tarabelli, David Zeitoun, Michel P. Imbert

Proceedings Volume 1397, 8th Intl Symp on Gas Flow and Chemical Lasers; (1991) https://doi.org/10.1117/12.25915
Event: Eighth International Symposium on Gas-Flow and Chemical Lasers, 1990, Madrid, Spain

Abstract

The flowfield of a CO2-N2 mixing gasdynamic laser is numerically analysed by using the laminar, two-dimensional unsteady Navier-Stokes equations coupled with the appropriate relaxation equations describing the vibrational transfer between the internal modes. These equations result from an averaging through the third dimension in order to take into account the area increase of the laser cavity in this direction. The equation system is solved with an explicit, time dependent, second order finite difference technique. The flowfield in each nozzle where CO2 and N2 are premixed and in the main laser cavity are so described. The analysis shows the complex structure of the flowfield, the influence of the premixing zone and of the diverging section on the small-signal gain coefficients and on the evolution of the flow quantities and the effect of different expressions of the transport coefficients on the vibrational energy distribution.

Citation Download Citation

D. Tarabelli, David Zeitoun, and Michel P. Imbert "Flowfield in a CO2-N2 gas-dynamics laser with staggered nozzles", Proc. SPIE 1397, 8th Intl Symp on Gas Flow and Chemical Lasers, (1 February 1991); https://doi.org/10.1117/12.25915

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