Fuel is provided to an inlet (14) of a cascade region (15) which
has a plurality of stages (17-23), each of which divides fuel flow evenly
into a pair of corresponding slots (24-26). The flow is then spread across
a floor surface (41) of a cascade exit header (40), the flow spreading
into areas between the slots. The flow is then directed into an open cavity which
is in fluid communication with the inlets of the fuel flow fields (12) of
the fuel cells, reaching the fuel flow field inlets uniformly and simultaneously.
