Accession Number : ADA187199

Title :   Disk Pumping Test.

Descriptive Note : Final rept. Aug 83-Feb 87,

Corporate Author : PRATT AND WHITNEY WEST PALM BEACH FL GOVERNMENT PRODUCTS DIV

Personal Author(s) : Graber, D J ; Daniels, W A ; Johnson, B V

PDF Url : ADA187199

Report Date : Sep 1987

Pagination or Media Count : 103

Abstract : An experimental study of secondary flows in gas turbine engines was conducted with cold flow models to develop an understanding of the disk pumping flow characteristics within a variety of disk/cavity configurations. Turbine disk torque experiments were conducted with co-rotating, counter-rotating, and one rotating/one static coaxial disk combinations. The experiments were conducted with selected combinations of disk shape, diaphragm between the rotating disks, bolts, and partial bolt covers. Turbine rim seal ingestion experiments were conducted with four seal configurations using a CO2 trace gas measurement technique. Results showed the effects of gap spacing and seal configuration on the rim seal ingestion rate. Compressor drum aerodynamic experiments were conducted with a six cavity model and with coolant flow injected from three radial locations. Results showed the effects of coolant flowrate and coolant injection location on the pressure distribution in each cavity. Compressor drum heat-transfer experiments were conducted for heating and cooling transient flow conditions. The results were compared on a dimensionless basis with results from previous steady-state rotating heat-transfer experiments and from a free convection correlation for stationary plates.

Descriptors :   *DISKS, *GAS TURBINES, *PUMPING, BOLTS, CAVITIES, COLD FLOW, CONVECTION, COOLANTS, COOLING, CORRELATION, ENGINES, FLOW, FLOW RATE, HEAT TRANSFER, INGESTION(ENGINES), INJECTION, MODELS, PLATES, PRESSURE DISTRIBUTION, ROTATION, SEALS(STOPPERS), SECONDARY FLOW, SHAPE, STATIONARY, STEADY STATE, TORQUE, TRANSIENTS

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE