Final answer:
Ice formation in a turbine engine fuel system is likely to occur at points where there are temperature drops and moisture, like fuel filters and lines. It is typically prevented by using fuel heaters, water separators, and sometimes adding anti-icing chemicals to the fuel.
Step-by-step explanation:
In a turbine engine fuel system, ice formation is most likely to occur at the points where there are significant temperature drops or where moisture is present, such as fuel filters, heat exchangers, and within the fuel lines themselves. Ice can restrict fuel flow and damage components. To prevent ice formation, turbine engines are often equipped with fuel heaters and systems to remove water from the fuel, typically by using fuel-water separators. These measures ensure that the fuel remains free-flowing and that ice does not form within the critical components of the fuel system.
Furthermore, additives such as Fuel System Icing Inhibitor (FSII) may be used, especially in colder climates to lower the freezing point of water in the fuel and inhibit ice crystal formation. Another preventive method involves keeping the fuel above its freezing point by insulation or routing fuel lines close to heat sources.
Regular maintenance of the fuel system, including the draining and cleaning of water separators, is crucial for optimal performance and to prevent ice formation in turbine engines.