Optical nonuniformities of nonequilibrium turbulent gas flow in fast-axial-flow CO2 laser

Vladislav Ya. Panchenko; Michail G. Galushkin; Vladimir S. Golubev; Yuri N. Zavalov

doi:10.1117/12.367583

3 November 1999 Optical nonuniformities of nonequilibrium turbulent gas flow in fast-axial-flow CO₂ laser

Vladislav Ya. Panchenko, Michail G. Galushkin, Vladimir S. Golubev, Yuri N. Zavalov

Author Affiliations +

Proceedings Volume 3760, High-Resolution Wavefront Control: Methods, Devices, and Applications; (1999) https://doi.org/10.1117/12.367583
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The luminescence method and the method of dual-beam shear interferometry were used to perform the measurements of spatial and time characteristics of molecular gas subsonic turbulent flow fluctuations under strong vibrational non- equilibrium. Gas-discharge tubes of fast-axial-flow CO₂ laser served as the investigation object. A turbulent component of gas density fluctuations has been separated by method of frequency selection of the registered signal. The spectrum of density pulsation has been determined, as well as the amplitude dependence of small-scale inhomogeneities on energy input has been specified. A degree of cross correlation of fluctuations of wave-front phase incursion in the turbulent flow has been evaluated under non-equilibrium conditions of electric discharge.

Citation Download Citation

Vladislav Ya. Panchenko, Michail G. Galushkin, Vladimir S. Golubev, and Yuri N. Zavalov "Optical nonuniformities of nonequilibrium turbulent gas flow in fast-axial-flow CO₂ laser", Proc. SPIE 3760, High-Resolution Wavefront Control: Methods, Devices, and Applications, (3 November 1999); https://doi.org/10.1117/12.367583

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