PEMFC 가스채널 직각 유로에서의 벽면 접촉각 분포에 따른 물 배출 특성에 대한 연구
A Study on Water Removal Characteristics in a Right Angle PEMFC Gas Channel Depending on Wall Contact Angle Distribution
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초록
The volume of fluid method is applied to study the effects of the gas channel wall contact angle on the removal characteristics of a water slug in a right angle PEMFC gas channel. While maintaining thesame GDL surface contact angle, two different contact angle distributions on the control area in the corner region are compared via the water coverage ratio and water volume fraction. The water coverage ratios of the hydrophobic channel corner case mainly show smaller values than that of the hydrophilic case except around 27 ms. The water volume fraction of the hydrophobic corner case is supposed to drop down quickly around 27 ms due to the dynamic movement of the liquid water compared to the hydrophilic case. In overall, the hydrophobic corner case shows better water slug removal characteristics.
Abstract
The volume of fluid method is applied to study the effects of the gas channel wall contact angle on the removal characteristics of a water slug in a right angle PEMFC gas channel. While maintaining thesame GDL surface contact angle, two different contact angle distributions on the control area in the corner region are compared via the water coverage ratio and water volume fraction. The water coverage ratios of the hydrophobic channel corner case mainly show smaller values than that of the hydrophilic case except around 27 ms. The water volume fraction of the hydrophobic corner case is supposed to drop down quickly around 27 ms due to the dynamic movement of the liquid water compared to the hydrophilic case. In overall, the hydrophobic corner case shows better water slug removal characteristics.
참고문헌 (7)
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