本研究主要目的在於散熱風扇在高轉速情況下之葉片應力分析。在研究中首先使用NACA的翼型規劃將翼型斷面確定後,再進入至Solid Works軟體中進行繪圖作業建立一個三維的軸流式風扇模型,繪製完成後轉檔匯入ANSYS/Workbench Fluent進行軟體分析,等待Fluent之分析結果輸入至ANSYS/Workbench Statics進行靜態分析,利用ANSYS/Workbench Fluent及Static模組,達到流固耦合的效果。由初始扇葉模型為基礎,為了提升風量以及改變應力優化的情形之下,進行根部及頂部的t_a變化,利用t_a改變,來改變優化初始模型在高轉速底下會產生的應力集中現象。並將模型分別置於不同轉速中,來觀察是否在不同轉速中的最佳結果都會相同。最後發現,在不同的轉速之下,將會有不同的最佳流量結果出現,而非同一個模型在任何轉速下皆為最佳結果。
The main purpose of this study is about the analysis stress of the cooling fan blades at high speed. First, we use the NACA airfoil rule to create and determined the airfoil section, then we use the Solid Works to create a three-dimensional (3D) axial fan model and import the 3D model to ANSYS/Workbench Fluent to analysis, and using the result import to ANSYS/Workbench Statics for statics analysis, use the ANSYS/Workbench Fluent and Static model to achieve the Fluid-Structure Interaction effect. Base on the initial model, in order to enhance the air volume and optimization the stress, we change the thickness in the base and top, use the term to optimization initial model stress concentration under the high speed, and the last model achieve the effect in the end. And we were placed the models in different speeds, to observed the results are the same or not in different speeds. Finally we find that the best result will be different in different speeds, not a model is the best under different speeds.