Why are centrifugal type boost pumps particularly used in high altitude aircraft?

Centrifugal type boost pumps are particularly suited for high altitude aircraft primarily because they are designed to supply fuel under pressure to the engine-driven pumps. At high altitudes, the atmospheric pressure decreases significantly, which can lead to difficulties in maintaining adequate fuel flow to the engines. Engine-driven pumps require a certain pressure to function effectively, and centrifugal boost pumps provide this necessary pre-pressurized fuel.

Moreover, centrifugal pumps are efficient at moving large volumes of fuel and can handle the pressure differentials encountered in high-altitude operations, ensuring that fuel continuously flows at the right pressure for optimal engine performance. This capability is critical for maintaining engine efficiency and preventing issues such as cavitation, which can stem from a drop in fuel pressure.