The 3-way valve have been used as a valve for opening and closing the valve by the flow control in the pressure system of the cryogenic and high pressure environment. In this paper, numerical analysis and experimental study on fracture nipple of 3-way ultra high pressure valve applied to space launch vehicle was carried out. We have developed a 3-way valve numerical simulation modeler of cryogenic environment using commercial software ANSYS 18.2. As results of numerical analysis, optimum nipple condition was derived. In addition, a 3-way valve prototype was fabricated and the fracture test was performed and compared with the numerical analysis results.

ABSTRACT
 1. 서 론
 2. 연구 방법
  2.1 3-way 밸브 모델링
  2.2 수치해석 경계조건 및 해석방법
 3. 결과 및 고찰
 4. 시제품 제작 및 파단 시험
 5. 결 론
 References

• 강대희(Research director of NeoSpec Co., Ltd.) | Dae-Hee Kang
• S. Ranjit(department of Mechanical and Automotive Engineering of Kongju National University) | Shrestha Ranjit
• 정윤재(department of Mechanical and Automotive Engineering of Kongju National University) | Yoon-Jae Chung
• 김원태(department of Mechanical and Automotive Engineering of Kongu National University) | Won-Tae Kim Corresponding Author