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The influence of cavity's diamond pattern on the performance of gas dynamic lasers

Published online by Cambridge University Press:  08 September 2016

A.M. Tahsini
A.M. Tahsini*
Affiliation:
Aerospace Research Institute, Tehran, Iran
*
a_m_tahsini@yahoo.com
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Abstract

The gas dynamic laser is numerically studied using quasi-1D and 2D simulations to investigate the effect of diamond pattern of the supersonic flow field (inhomogeneities in density field) on the laser's performance. The system of governing equations is solved with a finite volume approach using a structured grid in which the AUSM+ scheme is used to calculate the convective fluxes. Vibrational temperature of different modes, population inversion and the small signal gain are studied, and the effect of the divergent nozzle's geometry at the maximum gain is analysed.

Keywords

Diamond patterngaingas dynamiclasernonequilibriumnumerical simulationoptical cavitysupersonicvibrational energy
Type
Research Article
Information
The Aeronautical Journal , Volume 120 , Issue 1234 , December 2016 , pp. 1932 - 1942
Copyright
Copyright © Royal Aeronautical Society 2016 

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