SEPARATOR FOR FUEL CELL, AND FUEL CELL

摘要

A fuel cell separator (2) is defined at the turning portion of a reactive gas passage region (101) of a serpentine shape by an oblique boundary between a pair of flow trench groups communicating with an indentation portion (28) and by the outer end (28a) of the turning portion. A plurality of protrusions (27), which are raised from the bottom face of the indentation portion (28) and arranged in an island shape, are arranged to form a plurality of rows stretching at an interval in the extending direction of the outer end (28a) and to form a plurality of steps which stretch at an interval in the direction normal to the extending direction of the outer end (28a). The flow of the reactive gas, which is guided to advance in the extending direction of the outer end (28a) by the protrusions (27) forming one step, is disturbed by the protrusions (27) constituting the step adjacent to that one step.