Performance characteristics of a wave attenuation for pulsed chemical lasers
Abstract
Parametric performance measurements are reported for a pulsed chemical laser wave attenuator. The attenuator utilizes the combined effects of flow channel area expansion, caustic water spray, and flow-through damping screens to suppress and control the pressure disturbances produced by the chemical heat release of the F2 + D2 chain reaction. Experimental results that illustrate the effects of different area expansion geometries, water spray configurations, and damping screen arrangements are presented. Capability to tune the attenuator system to provide short pressure wave clearing times is emphasized. An attenuator configuration is reported which gives a wave clearing time of 2 msec with a corresponding entropy-wave density nonuniformity of 0.001 for a 18.5/6/76.5 F2/O2/diluent gas mixture at a pulse repetition frequency of 100 Hz.
- Publication:
-
14th Fluid and Plasma Dynamics Conference
- Pub Date:
- June 1981
- Bibcode:
- 1981fpdy.confR....B
- Keywords:
-
- Chemical Lasers;
- Dynamic Stability;
- Elastic Waves;
- Performance Tests;
- Pulsed Lasers;
- Wave Attenuation;
- Attenuators;
- Deuterium;
- Entropy;
- Fluorine;
- Laser Cavities;
- Multiphase Flow;
- Pressure Distribution;
- Test Equipment;
- Transient Response;
- Lasers and Masers