COIL performance model

Charles W. Clendening

doi:10.1117/12.236877

29 March 1996 COIL performance model

Charles W. Clendening

Proceedings Volume 2702, Gas and Chemical Lasers; (1996) https://doi.org/10.1117/12.236877
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

An end to end model was developed to predict the performance of a rotating disk Chemical Oxygen Iodine Laser (COIL). The model includes coupled routines to model the singlet oxygen generator (SOG) including ducting and cold trap, the nozzle, and the laser cavity and resonator. The SOG model is based on a quasi 1D two phase wetted wall approach. It includes an effective resistance chlorine/oxygen mass transfer model, a local basic hydrogen peroxide HO₂ diffusion model including property variations both in the flow direction and within the film, thermal analysis for both the liquid and gas phases, and evaluation of O₂(¹(Delta) ) detachment yield, surface deactivation, and gas phase deactivation. A mass addition routine based on variable specific heat and molecular weight influence coefficients is used to establish nozzle initial conditions. The results of the mass addition calculation are used iteratively to assess SOG stagnation pressure and if necessary SOG calculations are repeated. The primary and secondary streams are then separated into a number of stream tubes. The scale of the primary and secondary stream tubes is determined by the specific mixing scale and their stoichiometries by the initial flows. Mixing is assessed based on an approximate bimolecular diffusion coefficient analysis. Concurrent calculations are made to evaluate the effects of area expansion and chemistry. Once the calculation reaches the mirror location the computations can be performed iteratively with either a roof-top or Fabry Perot resonator to achieve self consistency between the mode characteristics and gain medium. The model is described and representative results presented.

Citation Download Citation

Charles W. Clendening "COIL performance model", Proc. SPIE 2702, Gas and Chemical Lasers, (29 March 1996); https://doi.org/10.1117/12.236877

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available