How does a gas turbine engine on jet planes work in rainy weather?

Answer 1

The effect is hardly noticeable. The total amount of compressed air sucked into a large jet engine is huge - about the size of a house every second. The amount of water ingested is a very small amount compared with total air volume. A very small amount of loss of power can occur. Also, the front spinner in the fan is designed to act like a centrifuge causing the heavier water to spin to the edge where it is collected in the bypass flow and sent to the back of the engine. What little is left is vaporised by extreme heat and pressure. An interesting addition... A rainy day may actually slightly increase the performance of a turbine engine as it would help lower the internal temperatures of the engine. The engines are tested to handle rain, hail, ice, even birds. Some older turbine aircraft, such as the B-52, even had water injection for takeoff to increase performance.