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Proceedings Paper

Injecting parameters design and performance test of the pre-igniter for continuous wave DF/HF chemical lasers
Author(s): Bing Huang; Shengfu Yuan; Lijia Yang; Xiaoting Fang
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Paper Abstract

Combustion-driven continuous wave (CW) DF/HF chemical lasers cannot be inflamed successfully sometimes because the spark-plug-igniter is intolerant of ablation especially after long-time operation which deeply affected the reliability of the lasers. In this paper, a pre-igniter is designed as a new igniter system to produce F2 to solve the problem. Based on the engineering practices and the principle that high-intensity spontaneous combustion will happen when mixing F2 and H2. The results of NF3 and H2 reacting with different mole ratios were calculated by CEA software. The operation reliability of the pre-igniter, the mole concentration of F2 in the mixing gas, and the equilibrium temperature were validated by a series of experiments. The experimental results were consistent with the calculated data: with the mole ratio of NF3 to H2 increasing, the equilibrium temperature decreased gradually and finally leveled off; the mole concentration of F2 in the mixing gas first increased and then decreased, achieving the maximum of about 40% when the mole ratio of NF3 to H2 was about 3.2. Experimental results outlined that the pre-igniter performed reliability and could produce high output of F2. The ignition system with a pre-igniter and a spark plug could provide a new alternative for combustion-driven CW DF/HF chemical lasers.

Paper Details

Date Published: 18 November 2014
PDF: 8 pages
Proc. SPIE 9266, High-Power Lasers and Applications VII, 92660Y (18 November 2014); doi: 10.1117/12.2066613
Show Author Affiliations
Bing Huang, National Univ. of Defense Technology (China)
Shengfu Yuan, National Univ. of Defense Technology (China)
Lijia Yang, National Univ. of Defense Technology (China)
Xiaoting Fang, National Univ. of Defense Technology (China)


Published in SPIE Proceedings Vol. 9266:
High-Power Lasers and Applications VII
Ruxin Li; Upendra N. Singh; Robert F. Walter, Editor(s)

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