A TEA CO2 laser was employed to ablate sprayed droplets for laser propulsion. The momentum coupling coefficient was derived from the force sensor data. Experimental results indicated that the coupling coefficient Cm was dependent largely on the droplet Sauter mean diameter (SMD), speed and their combined interaction. In conclusion, we have conducted, to our knowledge, the first study of laser propulsion with water droplets sprayed into the focal point by a propellant feeding system. It was found that the momentum coupling coefficient Cm was affected essentially by the droplet mean size D32, mean velocity v and the mutual interaction. As D32 increases Cm decreases. And Cm increases when v decreases with a narrower range of speed distribution. Additional experiments are necessary and further studies will be resumed when the experimental conditions have been were improved.
First experimental studies on ablation of liquids for laser propulsion
Lasers in Engineering ; 16 , 1/2 ; 51-59
2006
9 Seiten, 6 Bilder, 1 Tabelle, 11 Quellen
Aufsatz (Zeitschrift)
Englisch
Ablation of Liquids for Laser Propulsion with TEA CO~2 Laser
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