Accession Number : ADA320864

Title :   Laser Anemometry and Pressure Measurements in the Endwall Region of an Annular Turbine Cascade Utilizing a Pressurized Aerodynamic Window.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Guerrera, Michael H.

PDF Url : ADA320864

Report Date : SEP 1996

Pagination or Media Count : 109

Abstract : The purpose of this research was to compare previous laser anemometry measurements obtained through an unpressurized laser window with the results from a pressurized laser window and to validate this innovative measuring technique in the endwall region of a confined annulus. Two dimensional velocity, flow angle, and turbulence intensity measurements were obtained with a fiber optics laser Doppler velocimeter. The measurements were performed through a 1.09 mm opening in the endwall region of an annular turbine cascade at depths ranging from 0.01 mm to 0.89 mm with varying pressure applied to the chamber of the modified window. Cobra probe measurements were performed to validate the flow angles obtained by the laser anemometer. The cascade was modified to measure the inlet profile, which was performed with a three-hole probe.

Descriptors :   *LASER ANEMOMETERS, *CASCADE STRUCTURES, THESES, TURBULENT FLOW, PRESSURE MEASUREMENT, GAS TURBINES, FLOW FIELDS, WINDOWS, INLETS.

Subject Categories : Fluid Mechanics
      Infrared Detection and Detectors
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE