High frequency response heat flux gauge for metal blading
Abstract
Double-sided, high frequency response heat flux gauge technology developed specifically for use on metal turbine blading in short duration turbine test facilities is described in detail. The gauges consist of a metal film (1500A) resistance thermometer sputtered on both sides of a thin (25 micron) polyamide sheet. This sheet, containing 25 gauges, is then adhesively bonded (and completely covers) the airfoil surface. The temperature difference across the polyamide is a direct measure of the heat flux at low frequencies, while a quasi-1D analysis is used to infer the high frequency heat flux from the upper surface temperature history. The design criteria, construction and application techniques, and calibration procedures are discussed in detail. Sample measurements in a high pressure turbine are presented.
- Publication:
-
In AGARD Heat Transfer and Cooling in Gas Turbines 16 p (SEE N86-29823 21-07
- Pub Date:
- September 1985
- Bibcode:
- 1985htcg.agar.....E
- Keywords:
-
- Gas Turbines;
- Heat Flux;
- Heat Transfer;
- Resistance Thermometers;
- Surface Temperature;
- Temperature Measurement;
- Temperature Sensors;
- Turbine Blades;
- Calibrating;
- Fabrication;
- Frequency Response;
- Mounting;
- Thin Films;
- Fluid Mechanics and Heat Transfer