Define "compressor stall" in gas turbine engines.

Compressor stall refers to a condition in gas turbine engines where the airflow through the compressor becomes disrupted, leading to a significant reduction in performance and efficiency. This disruption typically occurs when the airflow exceeds the design limits of the compressor, which can happen due to various factors like excessive angle of attack, mechanical issues, or changes in operating conditions. In a stall, the smooth flow of air is interrupted, causing a drop in pressure and performance.

Understanding this phenomenon is crucial because it can lead to imbalances in the engine operation and, in severe cases, might result in engine failure if not managed properly. The implications of a stall extend to overall engine efficiency and can affect the safety and reliability of the gas turbine engine during operation.