How does water injection increase engine power?

The injection of coolant into the combustion chamber inlet increases the mass flow rate through the turbine. The pressure and temperature drop across the turbine results in an increase in pressure in the jet pipe, giving additional thrust.

How much water can a jet engine take?

There is a test that the faa mandates called the water ingestion test for engine certification. It requires and engine to perform during typhoon conditions or about 8 inches per hour. So to answer your question, yes they can take in a ton of water and keep trucking.

How much power does water injection add?

GAIN: Depending on how aggressive one wants to be with the boost increase and how much water one chooses to inject, the power increase can range anywhere from 10 to 25 percent. The power output of any engine is limited by the amount of oxygen it can ingest.

How does the water-injected jet engine work?

And NASA-TM-2010-213179is more specific on the system: Four water-injected Pratt & Whitney JT3C–6 engines were used on early Boeing 707–120 Stratoliner aircraft to augment takeoff thrust on days above 20 °F. This system used a belly tank to store demineralized water and an electrically driven boost pump to deliver water to the four engines.

What happens to a jet engine when it rains?

Water enters jet engines all the time. On a rainy day, water is entering the engine. Jet engines act somewhat like a blow torch, once they are lit, they keep lit. Just like the blow torch, they work fine in the rain.

How did early jet engines cool the air?

On many early jet airliners water was sprayed it into the engine air intake or compressor where evaporation cooled the air and allowed cooler, denser air to be ingested by the engine.

Which Boeing aircraft use water injection for thrust augmentation?

Boeing 707-120 aircraft with Pratt & Whitney JT3C-6 engines and later, the Boeing 747-100 & 200 aircraft with Pratt & Whitney JT9D-3AW and -7AW engines, all used water injection for thrust augmentation. This report discusses various techniques for water injection: