An experimental study of downstream mixing CO2 laser
Abstract
An experimental study on a CO2-N2 supersonic mixing GDL with screen nozzle has been performed on a small scale electric-arc heater device. By comparing and analyzing the measurements of small signal gain for various gas compositions and different nozzle Mach numbers, the mixing process and its effects on the performance of a MGDL are explored. The small signal gain increases the flow rate of CO2. The maxium value of 3.0/m of gain is recorded for a mixture of molar fraction of 0.4CO2/0.59N2/0.01 H2O with a donor gas stagnation temperature of 2000 K. The static and vibrational temperatures, and maximum available energy have been determined by using spectral gain measurement techniques. The radiation intensity distribution of excited CO2 molecules is observed in real time on a color TV. The comparison of experimental results with the theoretical calculation based on a gradual mixing assumption is satisfactory.
- Publication:
-
16th Fluid and Plasma Dynamics Conference
- Pub Date:
- July 1983
- Bibcode:
- 1983fpdy.conf.....Y
- Keywords:
-
- Carbon Dioxide Lasers;
- Gasdynamic Lasers;
- Jet Mixing Flow;
- Laser Outputs;
- Flow Visualization;
- Laser Cavities;
- Nitrogen Lasers;
- Power Gain;
- Lasers and Masers