Accession Number : ADA098310


Title :   Turbine Windage Torque Tests.


Descriptive Note : Final rept. 20 Aug 79-Oct 80,


Corporate Author : ROCKWELL INTERNATIONAL CANOGA PARK CA ROCKETDYNE DIV


Personal Author(s) : Sutton,R F


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a098310.pdf


Report Date : Jan 1981


Pagination or Media Count : 151


Abstract : Systems for producing high electrical power on demand include the use of a turbine/gas generator system. The power absorption by turbine windage is an important factor in determining the sizes of the vacuum pump and drive, if the turbine exhaust cavity is to be evacuated, and the size and quality of the vacuum isolation valve on the turbine exhaust system. Rocketdyne conducted windage torque tests on a MK15E3-2 turbine at speeds up to 30,000 RPM where torque contributions of shrouded and unshrouded wheels, single wheel, and bearing and seal power losses were determined at turbine cavity air pressure of 0.3 psia to atmospheric pressure (14.3 psia). Windage torque losses of the shrouded two-wheel system at atmospheric conditions represented about 2.6 percent of the overall rated turbine horsepower (155 versus 6,000 HP). (Author)


Descriptors :   *TURBINES , *TORQUE , PREDICTIONS , DEFLECTION , TURBINE BLADES , DATA ACQUISITION , SPINNING(MOTION) , LOSSES , BEARINGS , ABSORPTION , DYNAMOMETERS , ELECTRIC GENERATORS , FRICTION , BACK PRESSURE , GAS TURBINE ROTORS , HORSEPOWER , TURBINE WHEELS , SHROUD RINGS , VACUUM PUMPS , OIL SEALS


Subject Categories : Test Facilities, Equipment and Methods
      Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE