Accession Number : ADP005534

Title :   Combined Fringe and Fabry-Perot Laser Anemometer for Three Component Velocity Measurements in Turbine Stator Cascade Facility,

Corporate Author : NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER

Personal Author(s) : Seasholtz,Richard G. ; Goldman,Louis J.

Report Date : NOV 1986

Pagination or Media Count : 15

Abstract : A laser anemometer is described that was developed for use in a 508 mm diameter annular turbine stator cascade facility. All three velocity components are measured through a single restricted optical port, both within the stator vane row and downstream of the vanes. The measurements are made through a cylindrical window in the casing that matches the tip radius of the cascade. The stator tested has a contoured hub endwall that results in a large radial flow near the hub. The anemometer uses a standard fringe configuration (LFA) with a fluorescent aerosol seed to measure the axial and circumferential velocity components. The radial component is measured with a confocal Fabry-Perot interferometer. The two configurations are combined in a single optical system and can operate simultaneously. Data are presented to illustrate the capabilities of the system.

Descriptors :   *LASER ANEMOMETERS, *TURBINE STATORS, FABRY PEROT INTERFEROMETERS, TURBINE BLADES, AXIAL FLOW, CASCADE STRUCTURES, RADIAL FLOW, RADIAL VELOCITY, SEEDING, AEROSOLS, FLUORESCENCE, BACKSCATTERING, HUBS, WALLS, THREE DIMENSIONAL FLOW, VELOCITY, CASCADES(FLUID DYNAMICS), PORTS(OPENINGS), DATA ACQUISITION, ACCESS, LASER BEAMS

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE