Some links

Axial Flow Propulsor for Small Aircraft
Computational Fluid Dynamic Simulation (CFD) and Experimental Study on Wing-external Store Aerodynamic Interference

Design of Carbon Composite Driveshaft for Ultralight Aircraft Propulsion System

Flying Wings. A New Paradigm for Civil Aviation?
Rapid Prediction of Configuration Aerodynamics in the ConceptualDesign Phase
Design of a Three Surfaces R/C Aircraft Model
Response of a Light Aircraft Under Gust Loads
FEM MODELLING OF COMPOSITE STRUCTURES AND EXPERIMENTAL COMPARISON
www.vgtu.lt/english/editions/aviation/dokumentai/Nr_01.pdf

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    • Jesus
    • December 14th, 2008

    Hello:
    My name Is Jesús, and I´m a aeronautics engineer student. I´m going my end of degree project, but I have a problem, I need to know the laminar flow lenght of my fuselage, anybody know a method to calculate this?
    Thanks
    Jesús

    • Jesus
    • December 14th, 2008

    Hello:
    My name Is Jesús, and I´m a aeronautics engineer student. I´m going my end of degree project, but I have a problem, I need to know the laminar flow lenght of my fuselage, anybody know a method to calculate this?
    Thanks
    Jesús

    • Karoliina Salminen
    • December 16th, 2008

    You can do for example this:
    – Model the fuselage with an airfoil program (e.g. X-foil) as an airfoil and estimate the boundary layer transition points with that. Obviously if it is not symmetrical in shape to all directions, obviously you have to do the analysis for the shapes that are projected to side and to the top. Not very accurate if you deviate very far from a completely symmetrical and completely airfoil shape fuselage.
    – XFLR5 might have something that might help a little on that (not sure though, I am not that far with that). It is made for Windows, but I discovered that I can run it with wine on Linux. It crashes frequently though.
    – CFD analysis to the fuselage (I have not yet done that, so I can not say too much about that, but you can try by yourself, http://www.opencfd.co.uk/openfoam/ )

    • Karoliina Salminen
    • December 16th, 2008

    You can do for example this:
    – Model the fuselage with an airfoil program (e.g. X-foil) as an airfoil and estimate the boundary layer transition points with that. Obviously if it is not symmetrical in shape to all directions, obviously you have to do the analysis for the shapes that are projected to side and to the top. Not very accurate if you deviate very far from a completely symmetrical and completely airfoil shape fuselage.
    – XFLR5 might have something that might help a little on that (not sure though, I am not that far with that). It is made for Windows, but I discovered that I can run it with wine on Linux. It crashes frequently though.
    – CFD analysis to the fuselage (I have not yet done that, so I can not say too much about that, but you can try by yourself, http://www.opencfd.co.uk/openfoam/ )

    • Kate Alhola
    • December 16th, 2008

    By the way, some rules of thumb for the extensive laminar flow of the forward fuselage:
    – There must not be any protrusions, pitot tubes, antennas, landing gear, landing gear doors, propeller, engine cooling holes, air vents, intersections or rivets in the section you want to have sustaining laminar flow. This means that the forward fuselage must be one piece composite part with completely smooth surface.

    • Kate Alhola
    • December 16th, 2008

    By the way, some rules of thumb for the extensive laminar flow of the forward fuselage:
    – There must not be any protrusions, pitot tubes, antennas, landing gear, landing gear doors, propeller, engine cooling holes, air vents, intersections or rivets in the section you want to have sustaining laminar flow. This means that the forward fuselage must be one piece composite part with completely smooth surface.

    • dankegel
    • January 3rd, 2009

    Karoliina, I just tried XFLR5 in Wine-1.1.12, and saw no crashes.
    Can you give me a recipe for reproducing the crashes?
    Either email it to dank at kegel.com or file a bug at http://bugs.winehq.org
    and we’ll try to fix Wine.

    • karoliinasalminen
    • January 3rd, 2009

    Dankegel, I’ll try again and I’ll file a bug and/or email you when a crash occurs. It might turn out that I am running older version of wine than you and might be that the issue is already fixed on the latest version. I’ll try upgrading to latest version first before retrying XFLR5. Thanks a lot for your comment and help and that you care by the way!

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