Patent Number: 6,254,341

Title: Engine having resistance to particle deposits

Abstract: An engine, according to an exemplary embodiment of the invention, comprises a compressor which compresses inlet air; a combustor in which a mixture of fuel and air is combusted; a turbine which is driven by gases from the combustor; and a dielectric coating applied to a surface of at least one of: the compressor and the turbine, the dielectric coating having a dielectric constant of at least 3.0 and a loss tangent of at most 0.1, wherein the dielectric coating reduces the magnitude of an electrostatic force which attracts particles flowing through the engine to the surface of the engine. In operation, only a thin layer of particles typically accumulates on the dielectric coating. While the dielectric coating reduces the magnitude of the electric field which attracts particles, the repulsive force produced by the accumulated particles repels additional particles of the same charge. By reducing particle deposits, exemplary embodiments of the invention can reduce degradation in engine performance and provide significant cost savings through avoidance of maintenance.

Inventors: Ackerman; John Frederick (Cheyenne, WY), Stowell; William Randolph (Rising Sun, IN), Ivkovich; Dan (Fairfield, OH), Johnson; Robert Alan (Simpsonville, SC), Khang; Soon Jai (Cincinnati, OH), Park; Sang Yeng (West Chester, OH)

Assignee: General Electric Company

International Classification: F01D 25/00 (20060101); F01D 025/00 ()

Expiration Date: 07/03/2018