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Journal of Enhanced Heat Transfer

年間 8 号発行

ISSN 印刷: 1065-5131

ISSN オンライン: 1563-5074

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 2.3 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 1.8 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.2 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00037 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.6 SJR: 0.433 SNIP: 0.593 CiteScore™:: 4.3 H-Index: 35

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INVESTIGATION OF FLOW-INDUCED VIBRATION IN SLEEVE PREOPENING CONTROL VALVE

巻 19, 発行 6, 2012, pp. 571-575
DOI: 10.1615/JEnhHeatTransf.2012006006
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要約

Many studies have been done about the vibration character of fluid mechanics, but few of them have been conducted on the flow-induced vibration of valves. In this study, experimental research and numerical simulation are combined to investigate the flow-induced vibration of the preopening sleeve control valve. Pressure fluctuation near the valve's disc and the vibration character of the stem has been tested by the dynamic collection system in experiment. Then, numerical simulation is adopted to research the valve's internal flow field based on the experiment. According to the research, the following findings are concluded. First, the frequency components of pressure fluctuation changed with time and working conditions, but most of them are below 15 Hz. Second, pressure fluctuation near the valve's disc wall and the vibration amplitude of stem reached the maximum value in the condition of large opening. At this time, the frequency components of pressure fluctuation range is 3.8~4.1 Hz, which is resonated with the valve core components' first-order intrinsic frequency. Third, the structure of throttling hole and the valve' s disc type line influenced the internal flow field obviously, and it is the main reason for flow-induced vibration of the valve. The results of this study are useful to researchers attempting to gain more understanding about flow-induced vibration of valves.

参考
  1. Sunita, D. and Suman, C. , Thermally induced vibrations in a generalized thermoelastic medium with diffusion.

  2. Blevins, R. D. , Flow Induced Vibration.

  3. Pittard, M. T. , Large Eddy Simulation Based Turbulent Flow-Induced Vibration of Fully Developed Pipe Flow.

  4. Ryan, K., Pregnalato, C. J., and Thompson, M. C. , Flowinduced vibrations of a tethered circular cylinder.

  5. Watanabe, M., Nishino, K., and Kitajima, Y. , Flow-induced vibration of a control valve in a cavitating flow.

  6. Yonezawa, K., Tsujimoto, Y., and Tezuka, K. , Transonic flow vibration in a steam control valve for a power plant.

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