Chemical Laser Technology.
Final rept. 30 May 74-15 Jun 75.
HUGHES AIRCRAFT CO CULVER CITY CALIF LASER DIV
Pagination or Media Count:
The objectives of this program are to further elucidate the gasdynamic and kinetic processes in the laser cavity of a cw HFDF chemical laser. The plan was to collect new diagnostic data on several chemical laser nozzles for different cavity fuels including D2, DBr, and DI and to use this information to develop an improved macroscopic description of the laser fueloxidizer mixing process. The baseline description of the mixing process is a one-dimensional, laminar-diffusion model which was developed earlier. Here it is shown that two-dimensional, laminar diffusion is the square root of 3 times faster than 1-d diffusion. A critical feature in the development of the diagnostic techniques is the use of a pulsed electron beam probe to obtain high-spatial-resolution, number density data. Analysis of the pulsed system is presented along with its advantages over the more conventional cw e-beam probe. Work is continuing on the pulsed e-beam diagnostic. Necessary support data measurements on several nozzle configurations have been obtained and are reported along with limited systems analysis which supports the use of halogen fuels in large DFHF chemical laser systems.
- Physical Chemistry
- Lasers and Masers
- Fluid Mechanics