Accession Number : ADA299144

Title :   Water Model Tests on the Allison T56 Series 3 Combustion System,

Corporate Author : DEFENCE SCIENCE AND TECHNOLOGY ORGANIZATION CANBERRA (AUSTRALIA)

Personal Author(s) : McCabe, Grant T.

PDF Url : ADA299144

Report Date : MAR 1995

Pagination or Media Count : 31

Abstract : A modification was developed for the combustion system of the Allison T56 Series III turboprop engine which has resulted in an engine that has: * a lower smoke emission; * a lower specific fuel consumption; and * a combustor with potentially increased durability or life. In-service testing of the combustor has proven all the above advantages; however, the formation of hard carbon in the combustor and its subsequent release has resulted in increased erosion in the turbine section of the engine. Further development was undertaken to remedy this problem without affecting the overall gains offered by the modification. This report covers part of this work and, in particular, details flow field investigations made using a water flow model of the combustor liner. A comprehensive understanding of the flow mechanisms within the standard liner, the Low Smoke Modification liner (LSM), and proposed revisions of the LSM liner has now been obtained. It is anticipated that modifications arising from the present investigation will reduce, if not completely eliminate, hard carbon formation in the Revised LsM (RLSM) form.

Descriptors :   *TURBOPROP ENGINES, *COMBUSTORS, *MODEL TESTS, *AXIAL FLOW COMPRESSORS, TEST AND EVALUATION, EMISSION, WATER FLOW, MODELS, MODIFICATION, WATER, FIELD TESTS, CARBON, COMBUSTION, EROSION, LININGS, FLOW FIELDS, SMOKE, LOW LEVEL, FUEL CONSUMPTION, TURBINES, FLOW, LOW RATE.

Subject Categories : Hydraulic and Pneumatic Equipment
      Combustion and Ignition
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE