Numerical investigation of the two-dimensional distribution of the population inversion and gain during supersonic expansion of a CO/sub 2/--N/sub 2/--He mixture

Journal Article · Fri Jun 01 04:00:00 EDT 1979 · Sov. J. Quant. Electron. (Engl. Transl.); (United States)

DOI:https://doi.org/10.1070/QE1979v009n06ABEH009103· OSTI ID:6013092

Kurochkin, Y V; Smagin, N I

Results are presented of a numerical investigation of the flow of a vibrationally relaxing CO/sub 2/--N/sub 2/--He mixture during adiabatic expansion in planar and radial nozzles. Two-dimensional equations for the gasdynamics and relaxation kinetics, given in the form of integral conservation laws, are solved using a first-order explicit monotonic continuous counting scheme. Excitation of the optically active component on mixing with nitrogen is simulated in the instantaneous mixing approximation. Calculations are made of the gasdynamic channel of a radial nozzle grid with an annular diffuser. It is shown that the inversion density and gain are strongly dependent on the flow wave structure.

• OSTI ID: 6013092
• Journal Information: Sov. J. Quant. Electron. (Engl. Transl.); (United States), Journal Name: Sov. J. Quant. Electron. (Engl. Transl.); (United States) Vol. 9:6; ISSN SJQEA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
CARBON DIOXIDE LASERS
ENERGY LEVELS
EXCITED STATES
FLUID FLOW
GAIN
GAS LASERS
LASERS
POPULATION INVERSION
RELAXATION
SUPERSONIC FLOW
VIBRATIONAL STATES