Performance of a multi-stream injection COIL with starlet ejectors

Darren M. King, Tyler H. Field, David L. Carroll, Julia K. Laystrom-Woodard, Richard J. Driscoll, Lee H. Sentman, Adam M. Ragheb, Gregory S. Elliott, Wayne C. Solomon

Research output: Chapter in Book/Report/Conference proceedingConference contribution


A variant of an ejector mixing nozzle for a chemical oxygen-iodine laser (COIL) was experimentally tested with notched "starlet" ejectors. Cold flow planar laser induced fluorescence (PLIF) measurements indicate that the starlets provide faster mixing. Hot flow testing demonstrated that the starlet design improved laser performance by 20-30% above the basic cylindrical ejector design. Further, a conical ejector design with starlet notches was also tested that resulted in approximately a 15% improvement above the cylindrical design and has the potential for higher pressure recovery. Pressures in the singlet oxygen generator (SOG) were relatively constant with ejector flow rate suggesting that existing high efficiency SOGs can be used with this ejector nozzle configuration without sacrificing generator performance for pressure recovery potential.

Original languageEnglish (US)
Title of host publication41st AIAA Plasmadynamics and Lasers Conference
StatePublished - 2010
Event41st AIAA Plasmadynamics and Lasers Conference - Chicago, IL, United States
Duration: Jun 28 2010Jul 1 2010

Publication series

Name41st AIAA Plasmadynamics and Lasers Conference


Other41st AIAA Plasmadynamics and Lasers Conference
Country/TerritoryUnited States
CityChicago, IL

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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