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다공성 가스확산층의 국부적 변형을 고려한 금속 분리판 내 사행 유로 통합 전산 해석

Title
다공성 가스확산층의 국부적 변형을 고려한 금속 분리판 내 사행 유로 통합 전산 해석
Other Titles
Unified mechanical and fluidic analyses of serpentine channel flows in metallic bipolar plates under the influence of locally deformed porous gas diffusion layers
Author
엄석기
Keywords
사행유로; 국부 변형; 우회유동; 다공성 가스확산층; 금속분리판; Serpentine channel; Local deformation; Bypass flow; Porous gas diffusionlayer; Metallic bipolar plate
Issue Date
2013-05
Publisher
한국자동차공학회
Citation
한국자동차공학회 학술대회, 2013, P.1916-1921
Abstract
Unified conceptual systems of structural and flow dynamics are introduced to predict effects of porous gas diffusion layer (GDL) deformation on performance of polymer electrolyte fuel cells (PEFCs) by computational approaches. Static analysis is first performed to obtain local variations of GDL by stacking pressures. A number of case studies with selected key design parameters are conducted to figure out mechanical characteristics of GDLs contacting metallic bipolar plates. Successively, it is possible to apply the volumetric changes of the compressed GDLs to determine fluidic characteristics in serpentine gas supplying channels with trapezoidal cross-section area on the metallic plates. One of the distinctive features of the present study is the concept of bypass flow through the GDLs by the flow resistance difference over the entire computational domain. Channel flows in the metallic bipolar plates are investigated using a simplified theory based on entropy generation minimization theories. These multi-disciplinary modeling efforts are well suited for evaluating the fluidic performance of PEFCs and further applied to develop the optimized metallic bipolar plate designs.
URI
http://www.dbpia.co.kr/Journal/ArticleDetail/NODE02175120http://hdl.handle.net/20.500.11754/54775
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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