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http://dx.doi.org/10.5139/JKSAS.2005.33.1.078

Numerical Study of DF Chemical Laser Performance with Variations of D2 Injection Angles  

Park, Jun-Sung (한국과학기술원)
Baek, Seung-Wook (한국과학기술원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.33, no.1, 2005 , pp. 78-84 More about this Journal
Abstract
In the chemical laser system with a radial expansion nozzle array, the laser beam generation is achieved by mixing F atom from supersonic nozzle and $D_{2}$ molecule from holes of round-bended supply line. Based on that the fuel injection angle with main stream has a great influence of performance on supersonic combustor, the effects of $D_{2}$ injection angles with the main F flow on mixing enhancement are numerically investigated. The results are discussed by comparison with three cases of $D_{2}$ injection angles; $10^{o}$, $20^{o}$ and $40^{o}$ with the main flow direction. Major results reveal that as the $D_{2}$ injection angle increases, the maximum small signal gains and the static pressure in the laser cavity become higher. Consequently, the $D_{2}$ injection angle between $20^{o}$ and $40^{o}$ is recommended as an optimized geometric parameter in consideration of both of high gains and low cavity pressure.
Keywords
DF Chemical Laser; $D_2$ Injection Angle; Gains; Cavity Pressure;
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