What is the main purpose of anti-icing systems in gas turbines?

The main purpose of anti-icing systems in gas turbines is to prevent blade damage. Icing can occur when moisture in the air freezes on the surfaces of the turbine blades during specific operating conditions, especially in cold and humid environments. When ice accumulates on the blades, it alters their aerodynamic properties, which can lead to a decrease in efficiency. More critically, the additional weight of the ice can cause mechanical stresses that may lead to blade failure. The anti-icing system helps maintain the performance and integrity of the blades, ensuring that the turbine operates effectively and safely.

The other options, while related to potential issues caused by icing, do not summarize the primary objective of the anti-icing systems. For instance, blocking filters with ice is more a secondary concern and does not directly relate to the essential function of protecting turbine blades. Damage to duct work from icing could occur, but again, this is not the primary aim of anti-icing measures. Likewise, while compressor surging can be associated with icing conditions, the anti-icing system is not primarily designed to prevent this phenomenon. Instead, its focused intent is to safeguard the turbine blades themselves from the detrimental effects of ice formation.