The various hydraulic equipments including main control valves are composed of relatively long replacement parts, so the stability is very important. These systems ensure system safety by not delivering pressure to actuators when pressure exceeds the limiting pressure. According to various hydraulic equipments, the required pressure of every hydraulic actuators are differenced. So the optimal design of the main valve is indeed needed. In the previous study, the detail shapes and the boundary conditions of the main control valve were studied by CFD analysis using FLUENT. Based on the previous study, the optimal design of the main control valve is done by applying the parametric modeling technique and then the optimum design of the main control valve is investigated by CFD analysis.

ABSTRACT
 1. 서 론
 2. 최적형상 설계
  2.1 주제어 밸브 모델링
  2.2 유한체적모델 생성
  2.3 전산유체 해석
 3. 해석결과 및 분석
 4. 결 론
 후 기
 References

• 이태근(Precision mechanical engineering, Daeduk College) | Tae-Keun Lee Corresponding Author
• 민상기(Department of machine, car, system, Woosong College) | Sang-Ki Min
• 김대호(Department of mechanical engineering, Hanbat University) | Dae-Ho Kim