Accession Number : ADD013974

Title :   Method for Calibrating a Heat Flux Gauge.

Descriptive Note : Patent, Filed 19 Oct 87, patented 14 Mar 89,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Epstein, Alan H ; Guenette, Gerald R ; Norton, Robert J

Report Date : 14 Mar 1989

Pagination or Media Count : 16

Abstract : Double-sided, high-frequency response heat flux gauge for use on metal turbine blading consists of a metal film (1500A) resistance thermometer sputtered on both sides of a thin (25 micro) polyimide sheet. The temperature difference across the polyimide is a direct measure of the heat flux at low frequencies, while a quasi-one-dimensional analysis is used to infer the high-frequency heat flux from the upper surface history. A new method of calibrating the heat flux gauge utilizes light source applied to a plurality of fluids covering the surface of the gauge, measuring the temporal output of the gauge and utilizing derived calibration formula. The object of the invention was the development of heat transfer gauge technology which would permit simultaneous measurement of both the steady state and time resolved heat flux distribution about the rotor blades in the MIT Blowdown Turbine facility. Patents. (jes)

Descriptors :   *HEAT TRANSFER, *PATENTS, *STEADY STATE, BLOWDOWN, CALIBRATION, DISTRIBUTION, FACILITIES, FLUIDS, FORMULATIONS, GAGES, HEAT FLUX, HIGH FREQUENCY, HISTORY, INVENTIONS, LIGHT SOURCES, LOW FREQUENCY, MEASUREMENT, METAL FILMS, METALS, POLYIMIDE RESINS, RESISTANCE THERMOMETERS, ROTOR BLADES, SHEETS, SURFACES, SYNCHRONISM, TURBINE BLADES, TURBINES

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE