外桶旋轉式couette-flow系統之設計與測試

Design and testing of a couette-flow system with rotating outer cylinder

曾博駿(Bo-Jun Tzeng)

指導教授 ： 盧博堅

淡江大學/工學院/水資源及環境工程學系碩士班/碩士(2008年)

https://doi.org/10.6846/TKU.2008.01037

摘要

各式人工心臟及輔助器皆會產生較天然心臟更為混亂或剪應力較大之流場，造成血球的破壞如溶血及血栓等問題，因此研究血球受破壞程度與應力間之關係一直為相關學者們重要的研究課題，期望能得到準確之關係式進而改良人工心臟及輔助器之設計。本文根據文獻理論，設計出一外桶旋轉式之旋轉同心圓柱系統並測試，期望能夠作為血液破壞研究之裝置使用。實驗液體為蒸餾水及體積比36%甘油與64%蒸餾水混合之血液模擬溶液，實驗裝置為30.1mm半徑之外桶，測試兩種間隙尺寸0.1mm及0.3mm之旋轉同心圓柱流場。結果顯示在泰勒數1000、3000、5000、10000之情況下流場皆能保持在穩定均勻的流況，並且不產生泰勒渦漩，此流場可供作日後血液破壞研究實驗之使用。

關鍵字

溶血 ； 血栓 ； 旋轉同心圓柱流場 ； 泰勒數 ； 泰勒渦漩

並列摘要

Various types of artificial heart and ventricular assist devices can produce turbulent flow and larger shear stress than natural heart to damage red blood cells and cause some problems like hemolysis and thrombus. It is important to study how much shear stress can induce blood damage to improve better design of artificial organs. The purpose of this study is to design a circular couette-flow system with rotating outer cylinder and test if its flow field stable or not. The tested liquid is distilled water and 36% of the aqueous glycerin mixed with 64% of the distilled water by volume. The radius of outer cylinder of this concentric cylinder system is 30.1mm and gaps are 0.1mm and 0.3mm to test 4 kinds of flow field with different Taylor number which are 1000, 3000, 5000 and 10000. The result showed that this circular couette-flow is stable, uniform and doesn`t produce Taylor vortex. This flow field can be the use of Hemolysis research.

並列關鍵字

Hemolysis ； thrombus ； circular couette flow ； Taylor number ； Taylor vortex

參考文獻

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