| 研究生: |
趙元冠 Yuan-Guan Chao |
|---|---|
| 論文名稱: |
Gioia 和 Chakraborty 紊流摩擦係數模型之研究 The Study of Gioia & Chakraborty’s Model for the Turbulent Friction Factor |
| 指導教授: |
劉建嘉
李朱育 |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 機械工程學系 Department of Mechanical Engineering |
| 論文出版年: | 2024 |
| 畢業學年度: | 112 |
| 語文別: | 中文 |
| 論文頁數: | 41 |
| 中文關鍵詞: | 紊流摩擦阻力係數 |
| 外文關鍵詞: | turbulent friction factor |
| 相關次數: | 點閱:13 下載:0 |
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本研究探討由Gioia和Chakraborty提出的紊流摩擦係數的理論模型(GC模型)。GC模型研究了在粗糙管道中的紊流摩擦係數,展示了該係數與雷諾數和管壁相對粗糙度的相關性。本研究主要介紹了GC模型使用的紊流現象理論。在固定粗糙度條件下變化模型參數,以觀察參數對摩擦阻力係數的影響,希望藉此學習紊流摩擦係數的物理意義。
This paper discusses theoretical model of the turbulent friction factor proposed by Gioia and Chakraborty (GC model). The GC model studies the friction factor in turbulent rough pipes, showing its dependence. On the Reynolds number and the relative roughness of the pipe wall. The study here introduces briefly the phenomenological theory of turbulence used by the GC model. The model parameters are varied under a fixed roughness condition to observe the influence of a parameter on the friction factor, hoping to gain physical understanding of turbulent friction.
[1] S. B. Pope, ‘‘Turbulent Flows”, Cambridge University, (2000).
[2] 朱佳仁,黏性流體之流動,課程講義,國立中央大學,2014。
[3] J. Nikuradse, ‘‘National advisory committee for aeronautics technical memorandum” Washington, D. C, Reprinted in English, technical memorandum (1950).
[4] G. Gioia and P. Chakraborty, ‘‘Turbulent Friction in Rough Pipes and the Energy Spectrum of the Phenomenological Theory” Phys. Rev. Lett. 96, 044502 (2006).
[5] 網路資料 online Resourses : Origin of Turbulence and Turbulent Shear StRess.
取自https://ocw.snu.ac.kr/sites/default/files/NOTE/7482.pdf。
[6] 網路資料 online Resourses : Turbulence Modelling.
取自https://www.scribd.com/document/591421304/5-6192621874736793397。
[7] 網路資料 online Resourses : Energy spectrum of turbulence. 取自
https://www.Researchgate.net/figuRe/Energy-spectrum-cascade-of-turbulence_fig9_310451670。