Comparative performance of chemical lasers with axisymmetric and two-dimensional nozzles. Interim report
Technical Report
·
OSTI ID:7328305
Saturated output power from cold-reaction cw HF/DF diffusion-type chemical lasers in which axisymmetric or two-dimensional oxidizer nozzles are used is compared for the case where the pumping reaction is fast compared with collisional deactivation. For typical HF laser flow conditions and pw > 5 Torr cm, the axisymmetric nozzle has an output power twice that of a two-dimensional nozzle with the same exit flow, exit pressure p, and exit semiwidth w. In this pw regime, however, the chemical efficiency of the axisymmetric nozzle is 20%, or less, that of a premixed (pw = 0) laser. For pw = 1 Torr cm, the axisymmetric nozzle has about 30% greater output than the corresponding two-dimensional nozzle and a chemical efficiency equal to about 60% that of a premixed laser. For pw < 0.5 Torr cm, both nozzles have essentially premixed laser performance. (GRA)
- Research Organization:
- Aerospace Corp., El Segundo, CA (USA). Aerophysics Lab.
- OSTI ID:
- 7328305
- Report Number(s):
- AD-A-030933
- Country of Publication:
- United States
- Language:
- English
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