The renewable energy has, currently, been used because of its eco-friendly energy such as no emission gas and less environmental pollution. Fuel cell electric vehicle (FCEV) using polymer electrolyte membrane fuel cell (PEMFC) uses the hydrogen as fuel to obtain the power by electrochemical reaction. The objective of this study is to investigate the flow characteristics of the hydrogen according to entrainment ratio for ejector of FCEV through comparison analysis with the air. As the results, the flow of hydrogen in ejector corresponds to turbulence with Reynold number 18,093. The pressure difference of the hydrogen between primary flow and secondary flow in ejector was about 16 times compared with that of the air. The mean velocity of the hydrogen in ejector outlet was faster about 15 times than the air.

Abstract
1. 서 론
2. 모델링 및 수치해석 방법
3. 해석결과 및 고찰
4. 결 론
References

• 박민균(Graduate School, Future Automotive Eng., Gyeongsang National University) | Min-Gyun Park
• 최종원(Graduate School, Future Automotive Eng., Gyeongsang National University) | Jong-Won Choe
• 신규섭(Graduate School, Future Automotive Eng., Gyeongsang National University) | Kyu-Seop Shin
• 양영준(Professor, Future Automotive Eng., Gyeongsang National University) | Young-Joon Yang Corresponding author