Accession Number : ADA487450


Title :   Advanced Low-Emissions Catalytic Combustor Program


Descriptive Note : Final rept.


Corporate Author : PRATT AND WHITNEY EAST HARTFORD CT


Personal Author(s) : Sturgess, G. J.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA487450


Report Date : JUN 1981


Pagination or Media Count : 161


Abstract : In Task I of the Phase I program, six catalytic combustor concepts were defined. Analysis and evaluation of these six concepts were made under Task II. Major design considerations included low emissions, performance, safety, durability, installations, operations and development. On the basis of these considerations the two most promising concepts were selected. Refined analysis and preliminary design work was conducted on these two most promising concepts in Task III. The selected concepts were required to fit within the combustor chamber dimensions of the reference engine. This is achieved by using a dump diffuser discharging into a plenum chamber between the compressor discharge and the turbine inlet, with the combustors overlaying the prediffuser and the rear of the compressor. To enhance maintainability, the outer combustor case for each concept is designed to translate forward for accessibility to the catalytic reactor, liners and high pressure turbine area. The catalytic reactor is self-contained with air-cooled canning on a resilient mounting. Both selected concepts employed integrated engine-starting approaches to raise the catalytic reactor up to operating conditions. Advanced liner schemes are used to minimize required cooling air. The two selected concepts respectively employ fuel-rich initial thermal reaction followed by rapid quench and subsequent fuel-lean catalytic reaction of carbon monoxide, and, fuel-lean thermal reaction of some fuel in a continuously operating pilot combustor with fuel-lean catalytic reaction of remaining fuel in a radially-staged main combustor.


Descriptors :   *AIR POLLUTION , *EXHAUST GASES , *AEROTHERMODYNAMICS , *COMBUSTION , HIGH PRESSURE , EMISSION , INLETS , COMBUSTORS , FUELS , LININGS , MAINTAINABILITY , COMBUSTION CHAMBERS , CATALYSTS , CATALYSIS , TURBINES , CARBON MONOXIDE , COMPRESSORS , HEAT , PILOTS , REACTION KINETICS , PLENUM CHAMBERS , COOLING


Subject Categories : FLUID MECHANICS
      COMBUSTION AND IGNITION
      AIR POLLUTION AND CONTROL


Distribution Statement : APPROVED FOR PUBLIC RELEASE