System and method for cleaning a gas turbine engine and related wash stand

A method for cleaning a gas turbine engine, the gas turbine engine including a plurality of fan blades and a fan casing surrounding the plurality of fan blades, the method comprising:

• positioning a wash stand relative to the gas turbine engine, the wash stand including a plurality of fluid injection nozzles configured to be vertically supported at a location adjacent to the gas turbine engine;
• operating the gas turbine engine such that the plurality of fan blades are rotated in a rotational direction about a centerline of the gas turbine engine;
• and
• injecting a cleaning fluid from the plurality of fluid injection nozzles through an inlet of the fan casing as the plurality of fan blades are being rotated such that the cleaning fluid is directed past the plurality of rotating fan blades and into a compressor inlet of the gas turbine engine,
• wherein each fluid injection nozzle is oriented at a positive tangential angle defined relative to the rotational direction of the plurality of fan blades, wherein at least one of a tangential orientation or a radial orientation of each of the plurality of fluid injection nozzles is adjustable relative to the centerline of the gas turbine engine and is configured to be adjusted based on a rotor speed at which the gas turbine engine is turning while the cleaning fluid is being injected through the inlet of the fan casing.