This paper proposs a new bionic flow field （BFF） that integrates a spiral structure and petal-like fractals based on biomimetic principle, and compares the proposed BFF with the traditional single serpentine flow field （1SFF）, five snake flow field （5SFF） and parallel flow The performance indicators of PEMFC such as peak power density, water vapor transmission characteristics, current density distribution and pressure drop are compared and analyzed. The research results show that： under the operating voltage of 0.6 V, the average oxygen mass fraction of BFF is 67.9% higher than that of PFF, the average water mass fraction is 23.9% lower than that of PFF, and the uniformity index is higher than that of the other three flow fields, reaching 0.9; The membrane water content of each interface layer of BFF is less than that of the other three flow fields, effectively removing the product water; BFF significantly reduces the pressure drop, and the overall pressure drop is only 16.7% of PFF. The peak power density of BFF is 3.7% higher than 1SFF, 5.5% higher than 5SFF, and 30.1% higher than PFF.
Key words
proton exchange membrane fuel cell （PEMFC） /
flow field /
numerical simulation /
bionic design /
water management
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