Abstract
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.
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