An axial flow pump is like a big blender for water. Instead of having blades like a regular blender, it has big fins that spin around really fast. When it spins, it creates a tunnel for water to go through. The water gets sucked in from one end and pushed out the other end really fast. Think of it like a big straw that sucks up water and spits it out really fast! This pump is used to move a lot of water at once, like in swimming pools or fountains.