Investigation on dynamic characteristics of the displacer in Stirling cryocooler = 스털링 극저온 냉동기용 변위기의 동적 특성에 대한 연구

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Free-piston Stirling cryocoolers operate without physical linkages. They rely only on the gas pressures to make the correct motions of the reciprocating elements. The estimation of the pressure drop across a regenerator is very crucial in analyzing dynamic motion of the expander and predicting the performance of the cryocooler. This thesis proposes a new model of the pressure drop for more accurate description of oscillating flow in contrast to an existing model based on steady flow. To validate the new model, the analysis of dynamics of the Stirling cryocooler is carried out. For the universal uses of the oscillating flow model, non-dimensional parameters are derived from capillary tube model of the regenerator prior to experiments. And correlation equations of the model are obtained from the experiments for three types of wire-screen regenerator under various operating frequencies and inlet mass flow rates. These equations shall be useful for not only Stirling cryocooler but also pulse tube refrigerator design.
Advisors
Jeong, Sang-Kwonresearcher정상권researcher
Description
한국과학기술원 : 기계공학전공,
Publisher
한국과학기술원
Issue Date
2003
Identifier
180109/325007 / 020013609
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학전공, 2003.2, [ viii, 45 p. ]

Keywords

oscillating flow; Stirling; pressure drop; 압력강하; 왕복유동; 스털링

URI
http://hdl.handle.net/10203/45416
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=180109&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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