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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2019.1
- 수록면
- 310 - 316 (7page)
이용수
초록· 키워드
오류제보하기
Fluidelastic instability is a key issue in steam generator tube bundles subjected in cross-flow. With a lowflow velocity, a large amplitude vibration of the tube observed by many researchers. However, themechanism of this vibration is seldom analyzed. In this paper, the mechanism of cross-flow effects onfluidelastic instability of tube bundles was investigated. Analysis reveals that when the system reachesthe critical state, there would be two forms, with two critical velocities, and thus two expressions for thecritical velocities were obtained. Fluidelastic instability experiment and numerical analysis were conductedto obtain the critical velocity. And, if system damping is small, with increases of the flow velocity,the stability behavior of tube array changes. At a certain flow velocity, the stability of tube array reachesthe first critical state, a dynamic bifurcation occurs. The tube array returns to a stable state with continuesto increase the flow velocity. At another certain flow velocity, the stability of tube array reachesthe second critical state, another dynamic bifurcation occurs. However, if system damping is big, there isonly one critical state with increases the flow velocity. Compared the results of experiments to numericalanalysis, it shows a good agreement.
목차
등록된 정보가 없습니다.
참고문헌 (22)
참고문헌 신청
J. H. Lever / 1982 / A theoretical model for fluid-elastic instability in heat exchanger tube bundles / J. Pressure Vessel Technol 104:147~158
S. S. Chen / 1982 / Experiment and analysis of instability of tube rows subject to liquid crossflow / J. Appl. Mech 49:704~709
M. J. Pettigrew / 1995 / Vibration of a tube bundle in two-phase Freon cross-flow / J. Pressure Vessel Technol 117:321~329
M. J. Pettigrew / 2001 / The effects of bundle geometry on heat exchanger tube vibration in two-phase cross flow / J. Pressure Vessel Technol 123:414~420
T. Nakamura / 2002 / Dynamics of an in-line tube array subjected to steam-water cross-flow. Part I: two-phase damping and added mass / J. Fluid Struct 16(2):123~136
S. S. Chen / 1982 / Experiment and analysis of instability of tube rows subject to liquid crossflow / J. Appl. Mech 49:704~709
M. J. Pettigrew / 1995 / Vibration of a tube bundle in two-phase Freon cross-flow / J. Pressure Vessel Technol 117:321~329
M. J. Pettigrew / 2001 / The effects of bundle geometry on heat exchanger tube vibration in two-phase cross flow / J. Pressure Vessel Technol 123:414~420
T. Nakamura / 2002 / Dynamics of an in-line tube array subjected to steam-water cross-flow. Part I: two-phase damping and added mass / J. Fluid Struct 16(2):123~136
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