1. Rocket Engine Team, Korea Aerospace Research Institute, Daejeon 305-333, Republic of Korea
2. Department of Aerospace System Engineering, Sejong University, Seoul 143-747, Republic of Korea
3. Rocket Engine Development Division, Korea Aerospace Research Institute, Daejeon 305-333, Republic of Korea
4. Department of Mechanical Engineering, Hanbat National University, Daejeon 305-719, Republic of Korea