Which type of fuel boost pump is commonly used in aviation?

In aviation, the fuel boost pump is typically a centrifugal pump. This design is favored because centrifugal pumps are efficient at moving large volumes of fuel at relatively low pressure, which is essential for ensuring a smooth and continuous flow of fuel to the engine, especially during takeoff and climb phases where fuel demand is high.

Centrifugal pumps operate by converting kinetic energy from a rotating impeller into hydraulic energy, making them well-suited for maintaining the necessary fuel pressure in fuel systems. The ability to handle fluctuating fuel demands and the relatively simple design of centrifugal pumps contribute to their widespread usage in aviation fuel systems.

Other types of pumps like positive displacement pumps, rotary vane pumps, and diaphragm pumps have specific applications but do not typically meet the requirements for the fuel boost pump in aviation due to their design characteristics and operational features. Positive displacement pumps, for example, can provide high pressure but are not as efficient for the large flow rates needed in aviation applications.