Numerical analysis of vibrational nonequilibrium flows in supersonic nozzles of CO2 gas dynamic laser

Yasuhiro Mizobuchi; Eiji E.O. Ogura; Tadaharu Watanuki; Hiroshi Kubota

doi:10.1117/12.144634

4 May 1993 Numerical analysis of vibrational nonequilibrium flows in supersonic nozzles of CO2 gas dynamic laser

Yasuhiro Mizobuchi, Eiji E.O. Ogura, Tadaharu Watanuki, Hiroshi Kubota

Proceedings Volume 1810, 9th International Symposium on Gas Flow and Chemical Lasers; (1993) https://doi.org/10.1117/12.144634
Event: Ninth International Symposium on Gas Flow and Chemical Lasers, 1992, Heraklion, Greece

Abstract

The effects of the supersonic nozzle shape on the performance of CO₂ gasdynamic laser are analyzed by solving time-averaged two-dimensional Navier-Stokes equations coupled with the vibrational relaxation equations for a CO₂ - N₂ system. The solver is based on a finite difference method with an implicit high accuracy TVD scheme. Numerical simulations are carried out for various types of supersonic nozzles. The performance is estimated with the indicator of the small signal gain coefficient. The results show possibility of improvement for small signal gain coefficient by nozzle shape modification and suggest a suitable nozzle shape.

Citation Download Citation

Yasuhiro Mizobuchi, Eiji E.O. Ogura, Tadaharu Watanuki, and Hiroshi Kubota "Numerical analysis of vibrational nonequilibrium flows in supersonic nozzles of CO2 gas dynamic laser", Proc. SPIE 1810, 9th International Symposium on Gas Flow and Chemical Lasers, (4 May 1993); https://doi.org/10.1117/12.144634

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