What can ice crystals in fuel lead to within a turbine engine's fuel system?

Ice crystals forming in fuel can significantly impact a turbine engine's fuel system by causing clogging of system filters. When temperatures drop, especially at high altitudes where fuel can become colder, water that may be present in the fuel can freeze into ice crystals. These ice particles can then form within the fuel lines and filters, leading to blockages.

Such clogs restrict fuel flow, which can result in inadequate fuel supply to the engine, potentially leading to engine performance issues or failures. Ensuring clean fuel and a robust fuel system design, which includes effective filtration and water separation features, is crucial to prevent this issue. The presence of ice crystals does not enhance fuel properties or efficiency and instead poses a risk to the smooth operation of the engine.