Continuous-wave (F+H$sub 2$) chemical lasers: a temperature-dependent analytical diffusion model

Journal Article · Thu Jan 01 04:00:00 EST 1976 · Appl. Opt., v. 15, no. 1, pp. 223-235

OSTI ID:4066102

Herbelin, J M

The development of an analytical model for predicting the performance of HF lasers that result from the mixing of atomic fluorine with molecular hydrogen in continuously flowing systems is described. The model combines a temperature- dependent solution for a premixed laser system with laminar or turbulent flame- sheet mixing schemes to generate closed-form expressions for the two conditions of constant pressure (simulating a free jet) and constant density (simulating a partially confined flow). The various approximations, including a fully communicating cavity and characteristic reaction and deactivation lifetimes, are discussed. Scaling laws that relate power to the total pressure and nozzle parameters are developed. Comparison with exact numerical treatments for a wide range of conditions reveals that the model is consistently accurate to approx.10%. Finally, the sensitivity of the predictions to the kinetic rate package and the utility of the model for performing parameter studies are indicated. (AIP)

• Research Organization: Aerospace Corporation, P.O. Box 92957, El Segundo, California 90245
• NSA Number: NSA-33-023171
• OSTI ID: 4066102
• Journal Information: Appl. Opt., v. 15, no. 1, pp. 223-235, Journal Name: Appl. Opt., v. 15, no. 1, pp. 223-235; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

*CHEMICAL LASERS-- MATHEMATICAL MODELS
420300* --Engineering--Lasers
DIFFUSION
HYDROFLUORIC ACID
MIXING
N42210* --Engineering--Facilities & Equipment--Lasers
PERFORMANCE
SCALING LAWS
TEMPERATURE DEPENDENCE
TURBULENCE