Numerical Estimations of Third Generation Gas Dynamic Lasers by Bow Shock Waves
Gas mixtures are compressed by stationary bow shock waves which are detached from an obstacle. A nozzle which is laid down in this obstacle can expand these high temperature gases to get the population inversion. This mode of operation offers the possibility to quench the dissociation of the gases and to raise the source temperature of the gasdynamic lasers. Numerical predictions of such lasers are presented briefly. The main aim of calculations is how we can get a larger gain coefficient with our method than the one with the conventional method. We can get a larger gain coefficient of laser active gases N2-CO2- He at the high source-gas-temperature of 2,500 K, for example. Although this value of temperature lies only at the entrance of the third generation gasdynamic lasers, we must correctly know the rate constants in higher temperature region before we proceed to the future calculations of this kind.
KeywordsShock Wave Shock Tube Population Inversion Incident Shock Wave Gain Coefficient
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- /1/.Anderson jr., J.D., ‘Gasdynamic Lasers: An Introduction’ (1976) Academic PressGoogle Scholar
- /2/.Fiebig, M. and Hügel, H. ed., ‘Gasdynamic and Chemical Lasers’ Proc. Int. Sym. 11–15 Oct. 1976., Köln-Porz, GermanyGoogle Scholar
- /3/.Kasuya, K., Oertel jr., H. and Schmidt, B.,To be published as a contribution to a memorial book dedicated to Prof. Dr. H. Oertel, sen in 1978Google Scholar
- /6/.Anderson jr., J.D., AIAA Paper No. 74–176 (1974)Google Scholar
- /7/.ibid., NOLTR 69–200 (1969)Google Scholar
- /8/.Liepmann, H.W. and Roshko, A., ‘Elements of Gasdynamics’ (1966) John Wiley & Sons, Inc.Google Scholar
- /9/.Kasuya, K., To be publishedGoogle Scholar
- /10/.Glowacki, W.J. and Anderson jr., J.D., NOLTR 71–210 (1971)Google Scholar
- /11/.Shames, H. and Seashore, F.L., NACA Research Memorandum, No. 8J12 (1948)Google Scholar
- /12/.Zierep, J., AGARD-AG-191 (1974)Google Scholar
- /13/.McManus, J.I. and Anderson jr., J.D., AIAA J. vol. 14, No. 12, 1770.Google Scholar
- /14/.Bray, K.N.C., Fluid Mech. 6., 1–32 (1959).Google Scholar