Gas turbine surge/flameout protection against water ingestion

摘要

A ducted fan gas turbine engine (10) is provided with a plurality of sensors (23) which detect the presence of liquid water in air exhausted from the high pressure compressor (14) of the engine into its combustion system (15). In the event that liquid water is detected, the fuel flow to the combustion system (15) is increased to cause the high pressure compressor (14) to rotate faster and thereby vaporize the liquid water. Such liquid water can be present in the air exhausted from the high pressure compressor (14) when the engine (10) is operating in very heavy rain and can adversely affect normal engine operation.