Method For In-Situ Cleaning Of Compressor Blades In A Gas Turbine Engine On An Aircraft And Compositions
First Claim
Patent Images
1. A method for in-situ cleaning of compressor blades in a gas turbine engine on an aircraft, said method comprising the following sequential steps:
- Step 1—
washing said compressor blades by spraying a first liquid composition into the engine; and
Step 2—
as a final step in which any liquid composition is sprayed into the engine, rinsing said washed compressor blades by spraying a second liquid composition into the engine;
characterised in that said second liquid composition has a freezing point of −
10°
C. or below and is non-aqueous and hydrophilic; and
said first liquid composition is the same as or different from said second liquid composition.
1 Assignment
0 Petitions
Accused Products
Abstract
A method for in-situ cleaning of compressor blades in a gas turbine engine on an aircraft comprises the following sequential steps:
- Step 1—washing said compressor blades by spraying a first liquid composition into the engine; and
- Step 2—finally rinsing said washed compressor blades by spraying a second liquid composition into the engine,
wherein the second liquid composition, has a freezing point of −10° C. or below and is non-aqueous and hydrophilic.
14 Citations
18 Claims
-
1. A method for in-situ cleaning of compressor blades in a gas turbine engine on an aircraft, said method comprising the following sequential steps:
-
Step 1—
washing said compressor blades by spraying a first liquid composition into the engine; andStep 2—
as a final step in which any liquid composition is sprayed into the engine, rinsing said washed compressor blades by spraying a second liquid composition into the engine;characterised in that said second liquid composition has a freezing point of −
10°
C. or below and is non-aqueous and hydrophilic; andsaid first liquid composition is the same as or different from said second liquid composition. - View Dependent Claims (3, 4, 6, 7, 8, 9, 10, 12, 13, 17)
-
-
2. A method for in-situ cleaning of compressor blades in a plurality of gas turbine engines on one or more aircraft, said method comprising the following sequential steps:
-
Step 1—
washing the compressor blades in a first gas turbine engine on an aircraft by spraying a first liquid composition into said engine and draining at least a portion of the used first liquid composition into a collecting tank;Step 2—
as a final step in which any liquid composition is sprayed into said first gas turbine engine, rinsing said washed compressor blades in said first gas turbine engine by spraying a second liquid composition into said first engine, draining at least a portion of the used second liquid composition into said collecting tank and mixing said used second liquid composition with said first liquid composition in said collecting tank;Step 3—
washing the compressor blades in a second gas turbine engine by spraying a liquid composition derived form said collecting tank into said second engine and draining at least a portion of said used liquid composition derived from said collecting tank back into said collecting tank; andStep 4—
as a final step in which any liquid composition is sprayed into said second gas turbine engine, rinsing said washed compressor blades in said second gas turbine engine by spraying said second liquid composition into the engine, draining at least a portion of the used second liquid composition into said collecting tank and mixing said used second liquid composition with any liquid composition in said collecting tank; andoptionally repeating Step 3 and Step 4 as required to clean the compressor blades of subsequent gas turbine engine(s); wherein said second liquid composition has a freezing point of −
10°
C. or below and is non-aqueous and hydrophilic; andwherein said first liquid composition is the same as or different from said second liquid composition. - View Dependent Claims (5, 11, 14, 15, 16, 18)
-
Specification