Possibilities of improving the performance of an autonomous cw chemical DF laser by replacing the slot nozzles by the ramp ones in the nozzle array
The results of a comparative numerical study of the performance of an autonomous cw chemical DF laser are obtained by simulating the processes in the nozzles and laser cavity where several configurations of slot and ramp nozzle arrays are employed. Three-dimensional Navier-Stokes equations solved with the Ansys CFX software are used to describe the reacting multicomponent flow in the nozzles and laser cavity. To investigate lasing characteristics, a supplementary code is developed and is used to calculate the radiation intensity in the Fabry-Perot resonator, taking into account its nonuniform distribution along the aperture width and height. It is shown that the use of the nozzle array consisting of ramp nozzles, which, in contrast to the slot nozzles, provide enhanced mixing of the reactants makes it possible to improve the laser performance in the case of a high-pressure (more than 15 Torr) active medium. (control of radiation parameters)
- OSTI ID:
- 21552620
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Vol. 41, Issue 8; Other Information: DOI: 10.1070/QE2011v041n08ABEH014581; ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
APERTURES
COMPUTERIZED SIMULATION
CONFIGURATION
FABRY-PEROT INTERFEROMETER
FLUID MECHANICS
LASER CAVITIES
LASERS
NAVIER-STOKES EQUATIONS
NOZZLES
NUMERICAL ANALYSIS
PRESSURE RANGE MEGA PA 10-100
RESONATORS
THREE-DIMENSIONAL CALCULATIONS
DIFFERENTIAL EQUATIONS
ELECTRONIC EQUIPMENT
EQUATIONS
EQUIPMENT
INTERFEROMETERS
MATHEMATICS
MEASURING INSTRUMENTS
MECHANICS
OPENINGS
PARTIAL DIFFERENTIAL EQUATIONS
PRESSURE RANGE
PRESSURE RANGE MEGA PA
SIMULATION