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21. 发明授权

US06254341B1 Engine having resistance to particle deposits 有权
标题翻译：发动机具有抗颗粒沉积的能力
公开(公告)号：US06254341B1
公开(公告)日：2001-07-03
申请号：US09191824
申请日：1998-11-13
申请人： John Frederick Ackerman , William Randolph Stowell , Dan Ivkovich , Robert Alan Johnson , Soon Jai Khang , Sang Yeng Park
发明人： John Frederick Ackerman , William Randolph Stowell , Dan Ivkovich , Robert Alan Johnson , Soon Jai Khang , Sang Yeng Park
IPC分类号： F01D2500
CPC分类号： F01D25/00 , F04D29/023 , F04D29/324 , F05D2260/607 , Y02T50/672
摘要： 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.
摘要翻译：根据本发明的示例性实施例的发动机包括压缩入口空气的压缩机; 燃烧混合燃料的燃烧器; 由来自燃烧器的气体驱动的涡轮机; 以及施加到压缩机和涡轮机中的至少一个的表面的电介质涂层，所述电介质涂层具有至少3.0的介电常数和至多为0.1的损耗角正切，其中所述电介质涂层减小了静电的大小吸引流过发动机的颗粒到发动机表面的力。在操作中，只有薄层的颗粒通常积聚在电介质涂层上。虽然电介质涂层减小了吸引颗粒的电场的大小，但由累积的颗粒产生的排斥力排斥了相同电荷的附加颗粒。通过减少颗粒沉积物，本发明的示例性实施方案可以减少发动机性能的降低，并且通过避免维护来显着降低成本。

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