A report describes experiments in which planar laser-induced fluorescence (PLIF) of hydroxyl radicals was used to study the structures of flames in burner test rigs (a flame-tube combustor and a sector combustor) under conditions like those in combustors of aviation gas-turbine engines. The PLIF images from the sector-combustor experiments generally confirmed that the combustor functioned as designed. The PLIF images from the flame-tube experiments revealed previously unknown nonuniformities in flame structures; these images provided guidance for selection of an optimum number of fuel-injection points and for modifications of the fuel-injector design to improve combustion characteristics.

This work was done by Yolanda R. Hicks and Robert C. Anderson of Glenn Research Center and Randy J. Locke of NYMA, Inc.

Inquiries concerning rights for the commercial use of this invention should be addressed to

NASA Glenn Research Center
Commercial Technology Office
Attn: Tech Brief Patent Status
Attn: Steve Fedor
Mail Stop 4 - 8
21000 Brookpark Road
Cleveland
Ohio 44135

Refer to LEW-16565