Accession Number : ADA244849


Title :   Transport Phenomena and Interfacial Kinetics in Multiphase Combustion Systems


Descriptive Note : Final rept. 1 Jan 1989-31 Dec 1990,


Corporate Author : YALE UNIV NEW HAVEN CT HIGH TEMPERATURE CHEMICAL REACTION ENGINEERING LAB


Personal Author(s) : Rosner, Daniel E.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA244849


Report Date : FEB 1991


Pagination or Media Count : 150


Abstract : The performance of ramjets burning slurry fuels (leading to condensed oxide aerosols and liquid film deposits), gas turbine engines in dusty atmospheres, or when using fuels from nontraditional sources (e.g., shale-, or coal-derived), depends upon the formation and transport of small particles across non-isothermal combustion gas boundary layers (BLs). Even airbreathing engines burning clean hydrocarbon fuels can experience soot formation/deposition problems (e.g., combustor liner burnout, accelerated turbine blade erosion and hot corrosion). Moreover, particle formation and transport are important in many chemical reactors used to synthesize or process aerospace materials (turbine blade coatings, optical waveguides,...). Accordingly, our research is directed toward providing chemical propulsion system engineers and materials-oriented engineers with new techniques and quantitative information on important particle- and vapor-mass transport mechanisms and rates. An interactive experimental/theoretical approach has been used to gain understanding of performance-limiting chemical-, and mass/energy transfer-phenomena at or near interfaces. This included the further development and exploitation of seeded laboratory flat flame burners, flow-reactors, and new optical diagnostic techniques. Resulting experimental rate data, together with the predictions of asymptotic theories were used as the basis for proposing and verifying simple viewpoints and rational engineering correlations for future design/optimization studies.


Descriptors :   *METHODOLOGY , PARTICLE SIZE , SOOT , EXPERIMENTAL DATA , OPTIMIZATION , SYSTEMS ENGINEERING , CORROSION , INTERACTIONS , INTERFACES , LIQUIDS , MATERIALS , HIGH TEMPERATURE , THEORY , FILMS , RATES , PHASE , AEROSPACE SYSTEMS , BURNOUT , CHEMICAL REACTORS , CHEMISTRY , COATINGS , COMBUSTION , COMBUSTORS , DEPOSITION , DEPOSITS , DUST , EROSION , FUELS , GAS TURBINES , LININGS , PROPULSION SYSTEMS , RAMJET ENGINES , SLURRY FUELS , TRANSPORT PROPERTIES , TURBINE BLADES , PARTICLES , ENGINEERING , TRANSPORT , ENGINES , DIAGNOSIS(GENERAL) , ENGINEERS , KINETICS , ATMOSPHERES , APPROACH , OPTICS


Subject Categories : COMBUSTION AND IGNITION


Distribution Statement : APPROVED FOR PUBLIC RELEASE