Modeling of uniform droplet singlet oxygen generators

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:55448

Thayer, III, W J; Cousins, A K; Romea, R D ^[1]

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1. STI Optronics, Inc., Bellevue, WA (United States)

Electronically excited oxygen, O{sub 2}({sup 1}{Delta}), is the power source that drives chemical oxygen iodine lasers. O{sub 2}({sup 1}{Delta}) is often produced by reacting a basic hydrogen peroxide solution with gaseous chlorine. A new type of singlet oxygen generator has been both analytically and experimentally characterized. This new generator uses uniformly sized droplets of basic hydrogen peroxide (BHP) as the liquid phase reaction surface. The gaseous chlorine and O{sub 2}({sup 1}{Delta}) flow between a multitude of droplets in the generator. The fraction of chlorine that is converted into O{sub 2}({sup 1}{Delta}) depends on the coupled gas and liquid flow fields, diffusive mass transport, and homogeneous gas, liquid, and interface chemical reactions. A one-dimensional flow/chemistry code has been developed and used to investigate the effects of the choice of parameters associated with the two-phase chemistry and transport on the chlorine utilization, O{sub 2}({sup 1}{Delta}) yield, and the efficiency of converting chlorine into O{sub 2}({sup 1}{Delta}). Predicted sensitivities to flow condition, and the chemistry of the reactive media are presented. In particular, modeling results that identify dominant physical processed, and appropriate mathematical models will be discussed. Analysis and a review of available information on the chlorine reaction with BHP in O{sub 2}({sup 1}{Delta}) generators indicates that the performance of the UDOG should be dominated by the gas-liquid interfacial and internal liquid chemical reactions and diffusion processes. A major part of the modeling effort has been to investigate this assumption and question it. A surface reaction model provides much better agreement with measurements made in a uniform droplet O{sub 2}({sup 1}{Delta}) generator.

• OSTI ID: 55448
• Report Number(s): CONF-940142--; ISBN 0-8194-1410-7
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CHEMICAL LASERS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
GAS GENERATORS
MATHEMATICAL MODELS
OXYGEN
THEORETICAL DATA