Off-line wash systems and methods for a gas turbine engine

Patent metadata

Field	Value
Publication number	US-9739168-B2
Application number	US-201414297060-A
Country	US
Kind code	B2
Filing date	Jun 5, 2014
Priority date	Jun 5, 2014
Publication date	Aug 22, 2017
Grant date	Aug 22, 2017

Abstract

The present application and the resultant patent provide a wash system for a gas turbine engine. The wash system may include a water source containing a volume of water therein, and a surface filming agent source containing a volume of a surface filming agent therein. The wash system also may include a mixing chamber in fluid communication with the water source and the surface filming agent source, wherein the mixing chamber is configured to mix the water and the surface filming agent therein to produce a film-forming mixture. The wash system further may include an aerosolizing device in fluid communication with the mixing chamber and configured to form an aerosol spray of the film-forming mixture and a propellant. The wash system still further may include a number of supply lines in fluid communication with the aerosolizing device and configured to direct the aerosol spray into the gas turbine engine.

First claim

We claim:

1. A wash system for a component, the wash system comprising:
a water source containing a volume of water therein;
a surface filming agent source containing a volume of a surface filming agent therein;
a mixing chamber in fluid communication with the water source and the surface filming agent source, wherein the mixing chamber is configured to mix the water and the surface filming agent therein to produce a film-forming mixture;
an aerosolizing device in fluid communication with the mixing chamber and containing a propellant therein, wherein the aerosolizing device is configured to form an aerosol spray of the film-forming mixture and the propellant; and
a plurality of supply lines in fluid communication with the aerosolizing device, wherein the supply lines are configured to direct the aerosol spray onto the component.

2. The wash system of claim 1 , wherein the surface filming agent comprises a fluoro silane and an additional silane.

3. The wash system of claim 2 , wherein the additional silane is selected from a group consisting of mercapto silane, amino silane, tetraethyl orthosilicate, and succinic anhydride silane.

4. The wash system of claim 1 , wherein the surface filming agent comprises silane and mercapto silane.

5. The wash system of claim 1 , wherein the film-forming mixture is a liquid mixture.

6. The wash system of claim 1 , wherein the component comprises a gas turbine engine, and wherein the supply lines comprise a bellmouth supply line configured to direct the aerosol spray to a compressor bellmouth of the gas turbine engine.

7. The wash system of claim 1 , wherein the component comprises a gas turbine engine, and wherein the supply lines comprise a compressor supply line configured to direct the aerosol spray to one or more stages of a compressor of the gas turbine engine.

8. The wash system of claim 1 , wherein the component comprises a gas turbine engine, and wherein the supply lines comprise a turbine supply line configured to direct the aerosol spray to one or more stages of a turbine of the gas turbine engine.

9. The wash system of claim 1 , wherein the component comprises a gas turbine engine, wherein the wash system further comprises a cleaning agent source containing a volume of a cleaning agent therein, wherein the mixing chamber is in fluid communication with the cleaning agent source and is configured to mix the water and the cleaning agent therein to produce a cleaning mixture, and wherein the supply lines are configured to direct the cleaning mixture into the gas turbine engine.

10. A method of washing a gas turbine engine to remove contaminants therefrom, the method comprising:
providing a wash system comprising:
a water source containing a volume of water therein;
a surface filming agent source containing a volume of a surface filming agent therein:
a mixing chamber in fluid communication with the water source and the surface filming agent source, wherein the mixing chamber is configured to mix the water and the surface filming agent therein to produce a film-forming mixture;
an aerosolizing device in fluid communication with the mixing chamber and containing a propellant therein, wherein the aerosolizing device is configured to form an aerosol spray of the film-forming mixture and the propellant; and
a plurality of supply lines in fluid communication with the aerosolizing device;

directing a cleaning mixture through an air extraction system of the gas turbine engine, wherein the cleaning mixture comprises water and a cleaning agent;
applying the cleaning mixture to internal components of the gas turbine engine;
rinsing the cleaning mixture from the internal components;
directing the aerosol spray through the air extraction system;
applying the aerosol spray to the internal components; and
drying the film-forming mixture to form a protective film on the internal components.

11. The method of claim 10 , wherein the surface filming agent comprises a fluoro silane and an additional silane.

12. The method of claim 10 , wherein the surface filming agent comprises silane and mercapto silane.

13. The method of claim 10 , wherein the film-forming mixture is a liquid mixture.

14. The method of claim 10 , wherein the supply lines comprise a bellmouth supply line in communication with a compressor bellmouth of the gas turbine engine, and wherein the method further comprises directing the aerosol spray through the bellmouth supply line to the compressor bellmouth.

15. A gas turbine engine system, comprising:
a gas turbine engine, comprising:
a compressor;
a combustor in communication with the compressor;
a turbine in communication with the combustor; and
an air extraction system in communication with the compressor and the turbine;

a wash system, comprising:
a water source containing a volume of water therein;
a surface filming agent source containing a volume of a surface filming agent therein;
a mixing chamber in fluid communication with the water source and the surface filming agent source, wherein the mixing chamber is configured to mix the water and the surface filming agent therein to produce a film-forming mixture;
an aerosolizing device in fluid communication with the mixing chamber and containing a propellant therein, wherein the aerosolizing device is configured to form an aerosol spray of the film-forming mixture and the propellant; and
a plurality of supply lines in fluid communication with the mixing chamber, the aerosolizing device, and the air extraction system, wherein the supply lines are configured to direct the aerosol spray into the compressor and the turbine via the air extraction system.

16. The gas turbine engine system of claim 15 , wherein the surface filming agent comprises a fluoro silane and an additional silane.

17. The gas turbine engine system of claim 16 , wherein the additional silane is selected from a group consisting of mercapto silane, amino silane, tetraethyl orthosilicate, and succinic anhydride silane.

18. The gas turbine engine system of claim 15 , wherein the film-forming mixture is a liquid mixture.

19. The gas turbine engine system of claim 15 , wherein the air extraction system comprises:
a first air extraction line extending between one stage of the compressor and one stage of the turbine, wherein the first air extraction line is configured to direct the aerosol spray to the one stage of the compressor and the one stage of the turbine; and
a second air extraction line extending between another stage of the compressor and another stage of the turbine, wherein the second air extraction line is configured to direct the aerosol spray to the other stage of the compressor and the other stage of the turbine.

20. The gas turbine engine system of claim 19 , wherein the one stage of the compressor is a ninth stage of the compressor, wherein the one stage of the turbine is a third stage of the turbine, wherein the other stage of the compressor is a thirteenth stage of the compressor, and wherein the other stage of the turbine is a second stage of the turbine.

Assignees

• Gen Electric

Inventors

• Ekanayake Sanji
• Scipio Alston Ilford

Classifications

• B08B3/02 Primary

  Cleaning by the force of jets or sprays · CPC title

• F05D2260/607

  Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles · CPC title

• F01D25/002 Primary

  Cleaning of turbomachines · CPC title

• B05B7/0416

  with arrangements for mixing one gas and one liquid · CPC title

• C11D3/162

  containing Si · CPC title