What is the function of a scavenging pump in turbine engines?

The function of a scavenging pump in turbine engines is to remove oil from the engine and return it to the oil tank. This is a crucial process within the engine's lubrication system. During operation, oil is circulated through the engine to lubricate various components, including bearings and gears. As the oil circulates, it absorbs heat and contaminants, which can degrade its performance.

Once the oil has served its purpose, the scavenging pump ensures efficient removal of this used oil from areas such as the engine's sump or other compartments where oil tends to accumulate. The pump then directs this oil back to the oil tank, where it can be filtered, cooled, and reconditioned for recirculation. This continual cycle prevents oil starvation in critical areas, maintains optimal lubrication, and helps keep the engine running smoothly and efficiently.

The other options describe functions that are not associated with scavenging pumps. For instance, supplying fuel to the combustion chamber is performed by fuel pumps, filtering impurities from the air intake involves air filtration systems, and cooling overheated components is typically managed by heat exchangers or cooling systems rather than scavenging pumps. Thus, the correct identification of the scavenging pump's role is vital for understanding turbine engine operations.