Maximum blade surface temperature estimation for advanced stationary gas turbines in near-infrared (with reflection)
US7887234B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 16, 2007 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | Oct 4, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2005/0077
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods for maximum scene surface temperature estimation for blades with reflective surface properties in advanced stationary gas turbines are disclosed. The approach utilizes high speed infrared imagery provided by an online monitor system using a focal plan array (FPA) for near-infrared monitoring during engine runtime up to base load. The one waveband method for temperature estimation is assumed as starting point. A lower surface emissivity and higher surface reflectance of thermal barrier coating (TBC) in near-infrared can cause systematic estimation errors. Methods using the one wave band method, with the purpose to reduce estimation errors for maximum temperatures are also disclosed. Theoretical results, data from numerical simulations, and real data from engine test are provided. A system for performing temperature estimation methods is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.