Gas turbine flame detection system.

摘要

A directionally-sensitive flame detection apparatus and method for determining the presence of flame in a combustion chamber zone of a gas turbine. A radiation detector (28) is coupled to the monitored combustion zone (32) by a radiation collimator (26) having mechanically-lowered (40,42) internal reflectance so as to enhance the effective collimation angle. In this manner, a narrowed detector view angle ( beta ) is provided that is substantially independent of radiation wavelength or the material properties of the collimator tube <IMAGE>