Survey of Turbine Bucket Erosion, Deposits, and Corrosion

Abstract

The possibility of employing hot gas from a fluidized bed coal combustion system to drive a gas trubine appears attractive except that ash particles are likely to give serious trouble with turbine bucket erosion, deposits, and corrosion. This paper summarizes the principal information obtained from a comprehensive survey of the literature coupled with personal discussions with men who have worked on these problems. The information available indicates that the problems are formidable indeed, but that there is reason to hope that the superior characteristics of the fluidized bed coal combustion system will give both less abrasive particles and sufficiently better retention of the ash, particularly the alkali metal sulfates, that such a system might be developed.

Analysis/control of in-bed tube erosion phenomena in the fluidized bed combustion system. Final technical report

“…Depending on the specific model, the wall material is assumed to be removed in either a purely ductile mode, a purely brittle mode, or a combination of ductile and brittle modes. This group of models may be appropriate for understanding erosion phenomena in diluted solid suspensions, such as those found in pneumatic conveying pipelines and elbows or turbine blade cascades [13,14]. The second type of modeling is the fluid mechanic model, which attempts to add fluid mechanics to the single particle model.…”