Abstract
A mathematical model of a gasdynamic laser with parallel supersonic mixing of the components and its applications to the choice of the geometrical characteristics of the nozzle unit of honeycomb construction are presented.
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Abbreviations
- T:
-
static temperature
- u:
-
velocity
- P:
-
pressure
- μ:
-
molecular weight
- ei :
-
average number of vibrational quanta
- k:
-
amplification ratio for a weak signal
- I:
-
radiation intensity
- ξi :
-
molar fraction of the component in the mixture
- δ* :
-
displacement thickness
- r, d:
-
current radius and diameter of the nozzle
- θ:
-
angle of inclination of the generating profile of the nozzle and characteristic temperature
- h:
-
enthalpy
- G:
-
flow rate
- L:
-
characteristic length
- A/A*:
-
expansion ratio of the nozzle
- Tw :
-
wall temperature
- ¯Tw=¯Tw/To :
-
temperature factor
- η=E ∼a /E* :
-
nozzle efficiency
- E:
-
stored vibrational energy
- X=X/(ra1 + ra2):
-
dimensionless coordinate
- 1:
-
radiating gas stream
- 2:
-
exciting gas stream
- 0:
-
stagnation value
- a, *, ∼:
-
values at the cut of the nozzle, in its critical cross section, and beyond the compression shock in the cross section of the nozzle cut
Literature cited
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O. V. Achasov, R. I. Soloukhin, and N. A. Fomin, “A numerical analysis of the characteristics of a gasdynamic laser with selective thermal excitation and mixing in a supersonic stream,” Kvantovaya Elektron. (Moscow),5, No. 11, 2337–2341 (1978).
N. A. Fomin and S. M. Khizhnyak, Peculiarities in the choice of mixing conditions in a CO2-N2-H2O GDL,” Inzh.-Fiz. Zh.,42, No. 1, 42–46 (1982).
P. V. Belkov, V. V. Val'ko, A. S. D'yakov, et al., “CO2 GDL based on mixtures containing carbon monoxide,” Kvantovaya Elektron. (Moscow),7, No. 11, 2385–2392 (1980).
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Chemical Lasers [Russian translation], Mir, Moscow (1980).
A. G. Velikanov, N. M. Gorshunov, Yu. A. Kunin, et al., “Optimization of the light amplification ratio in a supersonic stream with mixing of vibrationally excited N2 with CO2-He,” Kvantovaya Elektron. (Moscow),7, 1869–1875 (1980).
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A. S. Birykov, “Kinetics of physical processes in gasdynamic lasers,” Tr. Fiz. Inst. Akad. Nauk SSSR,83, 13–86 (1975).
V. S. Avduevskii and R. I. Kopyatkevich, “Calculation of the laminar boundary layer in a compressible gas for an arbitrary pressure distribution over a surface,” izv. Akad. Nauk SSSR, Mekh. Mashinostr., No. 1, 3–12 (1960).
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P. E. Cassady, J. F. Newton, and P. H. Rose, “A new mixing gasdynamic laser,” AIAA J.16, No. 4, 305–312 (1978).
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 47, No. 1, pp. 53–59, July, 1984.
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Boreisho, A.S., Lebedev, V.F., Lobachev, V.V. et al. Calculation of the characteristics of a mixing CO2 gasdynamic laser with a nozzle unit of honeycomb construction. Journal of Engineering Physics 47, 781–786 (1984). https://doi.org/10.1007/BF00832592
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DOI: https://doi.org/10.1007/BF00832592