Particulate sizing in gas turbine exhausts using a laser extinction technique
Turner, Philip H.
Netzer, David W.
MetadataShow full item record
The measurement of soot particulates densities in gas turbine engine and rocket exhausts is an area of continuing scientific investigation. Knowledge of exhaust plume soot concentration and sizing is critical for plume signature determination, currently a focus of theatre ballistic missile defense research. This thesis research investigates the development and initial calibration of an instrument that will determine soot particle densities in an exhaust plume, by measuring the absorbtion of a light beam transmitted through the plume. This instrument utilizes an argon ion laser, four passes through the exhaust plume, and a phase conjugate crystal to correct for aberrations in the transmitted beam. Several aspects of instrument layout and performance were investigated, and an initial calibration against a conventional probe sampling technique was performed, using an ethelyne air combustor as a soot source. While soot concentration measurements obtained with the instrument were internally consistent, the primitive sample probe used limited the opportunity to do an accurate comparison against a conventional method. The method requires further development, but shows significant promise for use in a jet engine test cell.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Modification and experimental validation of a combined optical and collection probe for solid propellant exhaust analysis Kellman, Lyle J. (Monterey, California. Naval Postgraduate School, 1991-03);A combined optical and collection particle sizing probe was further developed and utilized for in situ measurements in the exhaust plumes of solid propellant rocket motors. Probe shock-swallowing capabilities were verified ...
Koh, Chuan Heng Erik (Monterey, California: Naval Postgraduate School, 2014-09);This thesis presents the effect of exhaust tube length-to-diameter (L/d) ratio, jacket-to-tube diameter (D/d) ratio, coolant inlet and outlet placements, exhaust gas swirling conditions, and tube materials (steel, copper, ...
Development of naval diesel engine duty cycles for air exhaust emission environmental impact analysis. Markle, Stephen Paul. (Monterey, California. Naval Postgraduate School, 1994-05);A strategy for testing naval diesel engines for exhaust emissions was developed. A survey of existing international and national standard diesel engine duty cycles was conducted. All were found to be inadequate for testing and ...