Earticle

초록

영어

The reliability of control valves is critical in nuclear power plants to ensure precise fluid regulation and prevent risks associated with overheating or decreased efficiency. Recently, the supply of imported control valves used in these plants has been discontinued, making the development of domestic alternatives an urgent necessity. This study focuses on the design of an orifice in the pilot valve pipe of a positioner to reduce hunting, a key issue that compromises control stability. Fluid analysis was conducted using ANSYS CFX to investigate the fluid behavior in the pipe with the orifice. The analysis methods included enhanced meshing techniques, turbulence models, and residual values to improve convergence and accuracy. To meet the operational requirements of nuclear power plants (outlet pressure: 3.2 bar, inlet pressure: 7 bar), the inlet fluid velocity was determined. The pressure and pressure hunting were analyzed. Results showed that the selected inlet velocity satisfied the operational conditions, and pressure hunting values were measured and analyzed. The findings provide a basis for further optimizing orifice shapes to achieve the target pressure hunting value of 0.5%.

목차

Abstract
1. 서론
2. 유동해석
2.1 Analysis model
2.2 Analysis setting
2.3 Results
3. 결론
References

키워드

저자

• 곽효서 [ Hyo-seo Kwak | Assistant professor, Mechanical Engineering Major, Dong-Eui University ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국기계항공기술학회지(구 한국기계기술학회지) [Journal of the Korean Society of Mechanical and Aviation Technology ]

• 간기

  격월간

• pISSN

  1229-604X

• eISSN

  2508-3805

• 수록기간

  1999~2026

• 등재여부

  KCI 등재

• 십진분류

  KDC 550 DDC 620