Dynamic gas temperature measurement system
Abstract
A gas temperature measurement system with compensated frequency response of 1 KHz and capability to operate in the exhaust of a gas turbine combustor was developed. Environmental guidelines for this measurement are presented, followed by a preliminary design of the selected measurement method. Transient thermal conduction effects were identified as important; a preliminary finite-element conduction model quantified the errors expected by neglecting conduction. A compensation method was developed to account for effects of conduction and convection. This method was verified in analog electrical simulations, and used to compensate dynamic temperature data from a laboratory combustor and a gas turbine engine. Detailed data compensations are presented. Analysis of error sources in the method were done to derive confidence levels for the compensated data.
- Publication:
-
Turbine Eng. Hot Sect. Technol. (HOST)
- Pub Date:
- October 1983
- Bibcode:
- 1983tehs.nasa...17E
- Keywords:
-
- Combustion Chambers;
- Gas Temperature;
- Gas Turbine Engines;
- High Temperature;
- Temperature Measurement;
- Conductive Heat Transfer;
- Convection;
- Error Analysis;
- Finite Element Method;
- Mathematical Models;
- Operating Temperature;
- Simulation;
- Instrumentation and Photography