<title>Mixing diagnostic in a cw DF chemical laser operating at high-cavity pressure</title>

A numerical study of cw chemical DF laser performance with ramp nozzle array

“…1. It was studied earlier in the experiments [1], where it was used to measure the small signal gain (SSG) in certain vibrational-rotational transitions of DF molecule. The numerical model used for the calculations in the present work included 3D Navier-Stokes equations, continuity equation, energy equation, mass transfer equations for individual chemical species (F, F 2 , D 2 , DF(v), ...) coupled with the ideal gas law [2].…”

“…The information on the experimental conditions and the measurements of SSG profiles that was reported in [1] served as input data for setting the first problem. This problem was intended to validate the available kinetic models [2,3] used in various numerical studies and determine the one that provides best agreement of the calculated SSG profiles with the ones measured experimentally.…”

Quantitative Mixing Measurements of a Supersonic Injection COIL Nozzle with Trip Jets

“…[16][17][18][19] It was noted that using reactants in the trip jets reduces the chance of having an inert gas layer present between the two reacting species, an effect that would inhibit mixing (and thus decrease the chemical laser efficiency).…”

“…Voignier et al studied three different methods to perturb the jet structure, motivated by the need to stretch the mixing interface in a deuterium fluoride (DF) combustion driven chemical laser and increase mixing. 16 They compared small signal gain profiles from different perturbation methods:…”

“…[16][17][18][19] An ejector COIL consisting of twodimensional slit nozzles with trip jet iodine injection was designed and tested. The trip jets were located at the NEP of the nitrogen nozzle (which was adjacent to the oxygen nozzle).…”