Surface treatments for preventing hydrocarbon thermal degradation deposits on articles

摘要

A method of preventing thermal hydrocarbon degradation deposits on a surface of a gas turbine component, the method includes providing the turbine component comprising the surface configured for contacting a hydrocarbon fluid, wherein the substrate comprises a material having a nominal liquid wettability sufficient to generate, with reference to an oil, a nominal contact angle, disposing a plurality of features on the substrate to form an anti-deposition surface texture, wherein the plurality of features have a size, shape, and orientation selected such that the surface has an effective wettability sufficient to generate, with reference to an oil, an effective contact angle of greater than the nominal contact angle, and the features comprise a width dimension (a), and a spacing dimension (b), wherein the features prevent the hydrocarbon fluid from penetrating into the surface texture and thereby reduce the adhesion of the thermal hydrocarbon deposits to the surface.

主权项

1. A method of preventing thermal hydrocarbon degradation deposits on a surface of a gas turbine component, the method comprising:
providing a turbine component within a combustion chamber where the component is contacted by hydrocarbon fuel or combustion products thereof during operation of the chamber, supplying hydrocarbon fluid to the combustion chamber and combusting the hydrocarbon fluid within the chamber, wherein the surface of the component comprises a material having a nominal liquid wettability sufficient to generate, with reference to an oil, a nominal contact angle; wherein a plurality of features have been disposed on the surface of the component to form an anti-deposition textured surface, wherein the plurality of features have a size, shape, and orientation selected such that the surface has an effective wettability sufficient to generate, with reference to an oil, an effective contact angle of greater than the nominal contact angle; and wherein the features comprise a width dimension (a), and a spacing dimension (b), and wherein the features prevent the hydrocarbon fluid or combustion product thereof from penetrating into the textured surface and thereby reduce adhesion of thermal hydrocarbon deposits to the textured surface of the turbine component.