Accession Number : AD0666394

Title :   EXPERIMENTAL DATA FOR TANDEM CASCADE IN THE HIGH SUBSONIC REGION,

Corporate Author : VON KARMAN INST FOR FLUID DYNAMICS RHODE-SAINT-GENESE (BELGIUM)

Personal Author(s) : Sieverding,C.

Report Date : SEP 1966

Pagination or Media Count : 53

Abstract : The work is the first part of studies on the use of the tandem cascade concept for application in the field of high turning angles. Two 1.64:1 scale models of a tandem cascade stator - the second model was a slightly changed version of the original design - were tested in a cascade wind tunnel for free stream Mach numbers of M = .5 to .9 and incidence angles of I = -4 deg. to +8 deg. Pressure measurements upstream; downstream and on the blade surfaces as well as schlieren pictures were taken. Application of back pressure was found to be necessary in order to get highest efficiencies and static pressure ratio. Side wall flaring or suction of the boundary layer at the side walls seem to be advisable for further testing. (Author)

Descriptors :   (*AXIAL FLOW COMPRESSORS, SUBSONIC CHARACTERISTICS), CASCADE STRUCTURES, EXPERIMENTAL DATA, MODEL TESTS, SCALE, AXIAL FLOW COMPRESSOR BLADES, EFFICIENCY, BOUNDARY LAYER, BELGIUM

Subject Categories : Aerodynamics
      Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE