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연료전지용 수소 재순환 블로워의 유동 및 성능의 수치적 평가
심창열(Chang-Yeul Shim),이경훈(Kyoung-Hoon Lee),홍창욱(Chang-Oug Hong),김영수(Young-Soo Kim) 한국자동차공학회 2005 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2005 No.11_2
Parametric calculations were conducted to estimate performance of variable geometry of hydrogen recirculation blower for fuel cell vehicle. The pressure rise and efficiency are effected by change of the geometric parameter of impeller and casing, and stripper clearance under various mass flow. Hydrodynamic performances were evaluated, and also the inner flow fields were investigated by CFD. Calculated results show good coincidence with experimental test results of total pressure performance. Performance of model designed by parametric calculations satisfies experimental data of verification model.
심창열(Chang-Yeul Shim),홍창욱(Chang-Oug Hong),김영수(Young-Soo Kim) 한국유체기계학회 2005 유체기계 연구개발 발표회 논문집 Vol.- No.-
Parametric calculation were conducted to estimate performance of variable geometry of hydrogen recirculation blower for fuel cell vehicle. The pressure rise and efficiency are effected by change of the geometric parameter of impeller and casing, and stripper clearance under various mass flow. Hydrodynamic performance were evaluated, and also the inner flow fields were investigated by CFD. Calculated results show good coincidence with experimental test results of total pressure performance. Performance of model designed by parametric calculations satisfied experimental data of verification model.
문종훈(Jong-Hoon Moon),홍창욱(Chang-Oug Hong),권중록(Joong-Lok Kwon) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
이젝터는 수소재순환가스를 고압의 주유동압을 사용하여 매체를 이송시키는 장치이다. 일반적으로 이젝터는 주유동 노즐, 혼합부, 재순환 챔버, 디퓨저로 구성된다. 이젝터는 단순한 구조와 상대운동부품이 없기 때문에 간단하게 대량의 유체를 이송시킬 수 있다. 연료전지차에서는 스택의 수소이용율을 높이기 위해 수소재순환시스템을 적용하는데, 이와 같은 시스템 중 블로어와 이젝터를 사용하는 하이브리드 수소재순환시스템에 적용한 이젝터를 본 연구에서 개발하였다. 연료전지차에 사용되는 이젝터는 자동차부품의 특성상 부피와 무게의 제약이 따르며 자동차 운전조건에 따라 최적의 부피로 최대한 재순환 가스를 흡입하여 스택으로 공급하여야 한다. 본 연구에서 연료전지 운전조건에 만족할 수 있는 이젝터를 개발하기 위하여 최적의 싱글이젝터를 설계하여 CFD 해석 및 실매체 시험을 통해 성능을 검증하였으며 이젝터의 흡입성능 영역을 확대하기 위하여 두 개의 이젝터를 결합한 듀얼이젝터를 개발하였다.
김정훈(Jung-Hoon Kim),손기석(Gi-Seok Son),장석영(Seok-young Chang),박상해(Sang-Hae Park),원찬희(Chan-Hee Won),민동준(Dong-Joon Min),홍창욱(Chang-Oug Hong),강희경,권중록(Joong-Lok Kwon),Hyun-Dong Lee 한국자동차공학회 2012 한국자동차공학회 부문종합 학술대회 Vol.2012 No.5
The Fuel Processing System for Fuel Cell Vehicle is the device which can supply highly pressured hydrogen to the stack and perform several functions such as decreasing the pressure and controlling the flux of hydrogen. It is essential to design Fuel Processing System which is capable to supply and recirculate the fuel from low-flow areas to high-flow areas, because Fuel-cell Vehicle is drived through broad flow areas and consists of dead-end type. In this process, the performance of Fuel processing system is advanced through the improvement of recirculation system such as Ejector and Hydrogen recirculation blower.
연료전지 수소재순환 이젝터 시스템에 관한 수치해석적 연구
남궁혁준(NamKoung, Hyuck-Joon),문종훈(Moon, Jong-Hoon),장석영(Jang, Seock-Young),홍창욱(Hong, Chang-Oug),이경훈(Lee, Kyoung-Hoon) 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11
Ejector system is a device to transport a low-pressure secondary flow by using a high-pressure primary flow. Ejector system is, in general, composed of a primary nozzle, a mixing section, a casing part for suction of secondary flow and a diffuser. It can induce the secondary flow or affect the secondary chamber pressure by both shear stress and pressure drop which are generated in the primary jet boundary. Ejector system is simple in construction and has no moving parts, so it can not only compress and transport a massive capacity of fluid without trouble, but also has little need for maintenance. Ejectors are widely used in a range of applications such as a turbine-based combined-cycle propulsion system and a high altitude test facility for rocket engine, pressure recovery system, desalination plant and ejector ramjet etc. The primary interest of this study is to set up an applicable model and operating conditions for an ejector in the condition of sonic and subsonic, which can be extended to the hydrogen fuel cell vehicle. Experimental and theoretical investigation on the sonic and subsonic ejectors with a converging-diverging diffuser was carried out. Optimization technique and numerical simulation was adopted for an optimal geometry design and satisfying the required performance at design point of ejector for hydrogen recirculation. Also, some sonic and subsonic ejectors with the function of changing nozzle position were manufactured precisely and tested for the comparison with the calculation results.