Yubin Kim, Kihwan Kim, Seungcheol Ryu, Hojun Cha, Seokho Kim
언어
한국어(KOR)
URL
https://www.earticle.net/Article/A445169
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4,000원
원문정보
초록
영어
High-temperature superconducting rotors offer advantages in terms of output-to-weight ratio and efficiency compared to conventional phase conduction motors or generators. The rotor can be cooled by conduction cooling, which attaches a cryocooler, and by refrigerant circulation, which uses circulating liquid or gas neon, helium and hydrogen. Recent work has focused on environmental issues and on high-temperature superconducting motors cooled with liquid hydrogen that can be combined with fuel cells. However, to ensure smooth supply and return of the cryogenic cooling fluid, a cryogenic rotational coupling between the rotating and stationary parts is necessary. Additionally, the development of a sealing structure to minimize fluid leakage applicable to the coupling is essential. This study describes the design and performance evaluation of a non-contact sealing method, specifically a labyrinth seal, which avoids power loss and heat load caused by friction in contact sealing structures. The seal design incorporates a spiral flow path to reduce leakage using centrifugal force, and computational fluid dynamics (CFD) simulations were conducted to analyze the flow path and rotational speed. A performance evaluation device was configured and employed to evaluate the designed seal. The results of this study will be used to develop a cryogenic rotational coupling with supply and return flow paths for cryogenic applications.
목차
Abstract 1. INTRODUCTION 2. 극저온 회전 커플링 3. 누설 유동 해석 3.1. 해석 모델 3.2. 메시 의존성 테스트 3.3. 해석 결과 4. 해석 모델의 실험 검증 4.1. 실험 장치 구성 4.2. 실험 결과 분석 4.3. 액체수소 적용시 누설 특성 해석 5. 결론 ACKNOWLEDGMENT REFERENCES
키워드
non-contact seallabyrinth sealcryogeniccomputational fluid dynamics (CFD)HTS motor
저자
Yubin Kim [ Department of Smart Manufacturing Engineering, Changwon National University, Changwon, Korea ]
Kihwan Kim [ Department of Smart Manufacturing Engineering, Changwon National University, Changwon, Korea ]
Seungcheol Ryu [ Department of Smart Manufacturing Engineering, Changwon National University, Changwon, Korea ]
Hojun Cha [ Department of Smart Manufacturing Engineering, Changwon National University, Changwon, Korea ]
Seokho Kim [ Mechanical engineering, Changwon National University, Changwon, Korea ]
Corresponding author