줄-톰슨 극저온 냉각기용 벨로우즈의 변형해석Deformation analysis of self-regulating bellows in Joule-Thomson cryocooler
- Other Titles
- Deformation analysis of self-regulating bellows in Joule-Thomson cryocooler
- Authors
- 이상은; 이태원
- Issue Date
- 2008
- Publisher
- 한국정밀공학회
- Keywords
- Cryogenic Temperature (극저온); Self-regulating Bellows (자기조절 벨로우즈); State Equation of
Gas (기체의 상태방정식); Cool-down (온도강하); Finite Element Analysis (유한요소해석)
- Citation
- 한국정밀공학회지, v.25, no.4, pp.100 - 107
- Journal Title
- 한국정밀공학회지
- Volume
- 25
- Number
- 4
- Start Page
- 100
- End Page
- 107
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/17989
- ISSN
- 1225-9071
- Abstract
- Bellows is an important component in Joule-Thomson cryocooler, which minimize the excessive flow of the cryogenic gas. The bellows is made of Monel 400 and its geometry is an axial symmetric shell. During cool-down process, the pressure and volume within bellows must be satisfied with Benedict-Webb-Rubin state equation. Moreover, Poisson's ratio of Monel 400 is nearly constants, but its Young's modulus varies for a drop in temperature. Under these conditions, bellows contracts in the axial direction like a spring. To evaluate deformation of bellows at cryogenic temperature, the numerical calculation of the volume within bellows and finite element analysis are iteratively used in this research. the numerical results show that deformation of the bellows is approximately linear for change of temperature.
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Collections - Department of Mechanical Design Engineering > 1. Journal Articles
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