Advanced cw hydrogen fluoride chemical laser performance

Robert E. Waldo

doi:10.1117/12.145219

6 June 1993 Advanced cw hydrogen fluoride chemical laser performance

Robert E. Waldo

Proceedings Volume 1871, Intense Laser Beams and Applications; (1993) https://doi.org/10.1117/12.145219
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

The performance of combustion driven cw HF chemical lasers using the HYpersonic Low- TEmperature (HYLTE) nozzle at the fundamental (2.8 micrometers ) and overtone (1.3 micrometers ) wavelengths was investigated. A pseudo-two dimensional, rotational equilibrium, finite rate, chemical kinetic, mixing laser simulation code, Blaze II, was used to model the HYLTE nozzle. The fluid dynamic profiles from Blaze II were used as input to the computationally efficient, rotational nonequilibrium model, ORNECL, which was used for power and small signal gain (SSG) calculations. The Blaze II fluid dynamic profiles and the ORNECL SSG profiles compared very well to the Direct Simulation Monte Carlo (DSMC) calculations performed by TRW. ORNECL was used to calculate the fundamental and overtone powers and SSG's for various flow conditions. Good agreement with experimental data was obtained. Calculated powers, SSG's and power spectral distributions (PSD's) are reported. The ORNECL model, which was baselined to experimental data, can be used to predict the performance of the HYLTE nozzle in advanced gain generator configurations. Blaze II and ORNECL (capable of power and SSG calculations) provide an inexpensive simulation of the HYLTE nozzle.

Citation Download Citation

Robert E. Waldo "Advanced cw hydrogen fluoride chemical laser performance", Proc. SPIE 1871, Intense Laser Beams and Applications, (6 June 1993); https://doi.org/10.1117/12.145219

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