Why must gas turbine supply air be free of 5 micrometer particles?

Gas turbines require a clean supply of air because particulate matter, especially particles that are 5 micrometers or larger, can be detrimental to the turbine blades. When these particles enter the turbine, they can adhere to the surfaces of the blades or even get lodged in moving parts. This accumulation can lead to abrasive wear, erosion, and other forms of damage, affecting the efficiency and lifespan of the turbine.

Ensuring that the air is free of these particles helps maintain optimal performance and reliability of the turbine, preventing costly repairs and downtime. The presence of such contaminants can disrupt the aerodynamics of the blades, leading to decreased efficiency in power generation and potentially catastrophic failures in severe cases. Thus, maintaining a clean air supply is crucial for the integrity and functionality of gas turbines.