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  • 1.
    Tsagarakis, Mikis
    Mälardalen University, School of Innovation, Design and Engineering.
    Project Solaris - Analysis of airfoil for solar powered flying wing UAV2011Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This study is part of the second phase of the Solaris project, where the aim is to develop a solar powered Unmanned Aerial Vehicle (UAV). The second phase involves the design and optimization of the aircraft. One of the important focuses in this phase is the determination of the airfoils shape. This report sole objective is to determine which airfoil that is best suited for the aircraft, as well as presenting the airfoils characteristic properties, in comparison to other similarly airfoils.This analysis has been carried out using XFOIL, an airfoil analysis tool developed by the MIT professor Mark Drela.

    What has been done in this report:

    • Comparison between a number of potential airfoils.
    • Determination of the winner airfoil.
    • Comparison between the winner airfoil and a conventional (non-reflexed trailing edge) airfoil.
    • Calculation of the hinge moments on the winner airfoil for different flap settings.

    Winner airfoil:

    The Phoenix (Phönix) turned out to be the best airfoil in the comparison, closely followed by the S5020 and the S5010. Phoenix had the highest value of the parameter sought to optimize, which is endurance (CL 3/2/ CD).

    Phoenix maximum endurance (CL 3/2/ CD) for five different Reynold numbers:

               Re       Endurance 

    • 400.000     85,64  
    • 300.000     78,26  
    • 200.000     67,74  
    • 100.000     49,47  
    • 50.000       25,52 

    Phoenix geometry:

    • Maximum thickness (in percentage of chord): 8,194%
    • Maximum camber (in percentage of chord): 2,774%
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