Two-Phase Cross-Flow-Induced Vibration of Tube Arrays

• NAKAMURA T.

  Takasago Research and Development Center, Mitsubishi Heavy Industries, Ltd.

• Fujita Katsuhisa

  Takasago Research and Development Center, Mitsubishi Heavy Industries, Ltd.

• Tsuge Ayao

  Takasago Research and Development Center, Mitsubishi Heavy Industries, Ltd.

抄録

Many heat-exchange tubes in a shell-and-tube-type heat exchanger are oscillated by means of the flow . of fluid through the heat exchanger. This flow is often cross flow and gas-liquid two-phase flow. Here, a brief review of studies on two-phase cross-flow-induced vibration is presented, and a summary of our work in this area provides a design methodology. Three types of vibration have been studied for tubes in two-phase cross-flow conditions: First, resonance of a tube due to vortex shedding is important primarily in single-phase flow, but also has been observed in homogeneous flow and even in two-phase flow. However, this vibration disappears in the slug flow or froth flow regions, which are important in numerous heat exchangers. Therefore, the vortex shedding phenomenon is not considered in this paper. Secondly, turbulent buffeting vibration is considered as the dominant phenomenon in the slug flow and froth flow regions. A method for estimating this type of random vibration is explained in this paper. Thirdly, an unstable form of vibration, so-called fluid elastic vibration, is also considered. The common method for estimating the instability boundary is similar to that used for single-phase flow; however, new insights on the method for two-phase flow are given in this paper.

収録刊行物

• JSME International Journal, Series B

  JSME International Journal, Series B 36 (3), 429-, 1993

  一般社団法人日本機械学会

キーワード

• Fluid Vibration
• Two-Phase Flow
• Tube Array
• Cross Flow
• Random Vibration
• Fluid Elastic Instability

詳細情報

• CRID: 1570009752166379136
• NII論文ID: 110002976677
• NII書誌ID: AA10888815
• ISSN: 13408054
• 本文言語コード: en
• データソース種別:
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