無人機螺旋槳設計與數值模擬分析

Design and Numerical Analysis of UAV Propeller

劉幸昌(Shing-Chang Liu)

指導教授 ： 湯敬民

淡江大學/工學院/航空太空工程學系碩士班/碩士(2019年)

https://doi.org/10.6846/TKU.2019.00868

摘要

本研究目的為設計以金屬3D列印技術製造之中型無人機螺旋槳，並針對這種尺寸的螺旋槳建立一套以計算流體力學分析其性能的方法。先以CAD軟體設計一16 in螺旋槳，利用CFD軟體對其進行飛行時的流場分析。吾人採用CATIA進行外型設計，透過ANSYS Fluent進行流場模擬，調整不同飛行速度、不同螺旋槳轉速，模擬在各前進比(advance ratio)下的性能與流場，期望了解螺旋槳之效率，為無人機螺旋槳提供設計之選擇。
　　模擬結果顯示在低前進比(0.2～0.5)，也就是目標條件下時，螺旋槳效率表現良好；當前進比大於0.5以上時，效率提升趨緩，表現相對不好，在前進比為0.591時效率達到最高0.668。

關鍵字

CFD ； 無人機螺旋槳

並列摘要

The purpose of this study was to design a UAV propeller using metal 3D printing technology, and establish a method of computational fluid dynamics to analyze the performance of the propeller. Firstly, a 16-inch propeller was designed with CAD software, and simulated the flow field during flight with CFD software. Using CATIA for exterior design, CFD simulation through ANSYS Fluent, adjust different flight speeds, different propeller speeds, simulate performance and flow field for each advance ratio, expect to know the efficiency of the propeller and offer a choice of design.
Simulation results show that the propeller efficiency is good at low advance ratio (0.2~0.5), which is the target condition; when advance ratio is higher than 0.5, the efficiency improvement is slow, the performance is relatively poor. The efficiency is highest to 0.668 when the advance ratio is 0.591.

並列關鍵字

CFD ； Numerical Analysis ； Propeller ； Unmanned Aerial Vehicle (UAV) Propeller

參考文獻

[1] B. Venkatesh, Design and Performance Evaluation of a Propeller, 2012.

[2] Ohad Gur and Aviv Rosen, “Propeller Performance at Low Advance Ratio,” JOURNAL OF AIRCRAFT, 42(2):435-441, 2005.

[3] Brandt, J. B., Small-Scale Propeller Performance at Low Speeds, Department of Aerospace Engineering,University of Illinois at Urbana-Champaign, 2005.

[4] Brandt, J. B. and Selig, M. S., Propeller Performance Data at Low Reynolds Numbers, 49th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition., 2011.

[5] Aron Brezina and Scott Thomas, “Measurement of Static and Dynamic Performance Characteristics of Electric Propulsion Systems”.AIAA 2013-0500, 51st AIAA Aerospace Sciences Meeting, 7-10 January 2013, Grapevine, Texas.