導罩螺槳架構於浮游車體之推進性能研究

本文旨在發展適合浮游甲車使用之導罩螺槳，因此首先以電腦輔助繪圖軟體繪製螺槳構型，並參考NACA 2408翼型建構導罩螺槳外型。在完成不同型式的導罩螺槳構型之後，本研究採用標準k-ε紊流模式進行導罩螺槳數值流場分析，並依據數值計算結果選擇適合的導罩螺槳配置於浮游甲車。接著，本研究再結合VOF方法執行浮游甲車加裝導罩螺槳之運動流場模擬，最後由數值計算結果可知，當導罩螺槳分別以1,100 RPM及1,500 RPM運轉時，浮游甲車分別能達到以2.22 m/s及2.78 m/s自推前進之研究目標。本研究所建立之數值模擬分析方法，能有效率地執行浮游甲車配置導罩螺槳之運動流場分析，未來可運用本方法之特性與優勢，進一步發展實際可行的工程設計方法，以作為新型輪型甲車研究發展之工具。

關鍵字

兩棲甲車；導罩螺槳；流體體積法；計算流體力學

並列摘要

This study aims to develop ducted propellers as the propulsion system of amphibious vehicles. At first, we used CAD software to draw the geometry of propellers and applied the profile of the NACA 2408 airfoil to construct the outline of ducted propellers. After completing different types of the geometry of the ducted propellers, this study employed the standard k-ε turbulent model to perform numerical simulation of the ducted propellers. Furthermore, we also combined the method of VOF to employ amphibious vehicle motion flow field numerical simulation. The simulation results show that when the ducted propeller operated at 1,100 RPM and 1,500 RPM, the amphibious vehicle can move forward and achieve the expected speed of 2.22 m/sand 2.78 m/s, respectively. The numerical simulation methods established by this study can effectively perform the motion flow field analysis of the amphibious vehicle. In the future, the characteristics and advantages of these numerical simulation methods can also be used to develop a feasible engineering design means, and as a reference for the research and development of new amphibious vehicles.

並列關鍵字

amphibious vehicle ； ducted propeller ； volume of fluid ； computational fluid dynamics

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