Xfoil tutorial

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  • Опубліковано 7 жов 2024
  • introduction to using Xfoil to analyze subsonic airfoil shapes.

КОМЕНТАРІ • 45

  • @emilyy6816
    @emilyy6816 4 роки тому +9

    I appreciate this tutorial so much! It was really nice and detailed. I learned a lot.

  • @hostkakamay2577
    @hostkakamay2577 3 роки тому +1

    very rich information in one video... very apreciate Dr Hays

  • @Canyldrm3566
    @Canyldrm3566 3 місяці тому

    thank you. what a beautiful tutorial for a beautiful program.

  • @ChiHungChong-ep2dv
    @ChiHungChong-ep2dv 4 роки тому +2

    Thank you very much for the tutorial, Dr!

  • @Q_Channel1
    @Q_Channel1 2 роки тому +2

    This is so good dude -- make another one of these showing a full analysis of a wing, or showing advanced techniques!

  • @MrDennis006
    @MrDennis006 3 роки тому +2

    Thanks a lot! I found tutorial very useful.

  • @derbazkhalil5290
    @derbazkhalil5290 3 роки тому +2

    %100 Really appreciated , thanks God, that sent you to me at this moment

  • @alejandropenagos8194
    @alejandropenagos8194 3 роки тому +1

    Thank you.

  • @bryanszloh5408
    @bryanszloh5408 2 місяці тому

    Any idea on how to fix a warning that says 'poor input coordination distribution'. Apparently, there is an excessive panel angle 40.1 at i = 26. It suggests fixing this with repaneling with PANE? What does this mean and is this something I should be concerned about? Ran the airfoil a bit in viscous mode and it seems to run fine from 0 to 18 degree AOA.

  • @greg.ocallaghan
    @greg.ocallaghan 2 роки тому

    At 14:45 you mention there's some GUI's that go over Xfoil making it easier to make polars, etc. Would you mind sharing some insight into those? Curious what they are and how they function. Thanks and awesome tutorial otherwise.

    • @DrHays-go1cn
      @DrHays-go1cn  2 роки тому +1

      I would recommend the Xflr5 program. Its latest version is quite stable, and you can conduct multithreaded Xfoil analysis with nice plotting. I was using it just today in fact!

  • @sebastianopadoan5528
    @sebastianopadoan5528 4 роки тому

    Dr Hays thanks a lot for this video. I have one question regarding the FMOM command. To calculate the force how to proceed? there is a coefficient * rho (air or water density) * v^2 (velocity) and c. My question is what is C?

  • @sananography
    @sananography 2 роки тому

    Respected Dr. Hays; my Xfoil software is not displaying Cd values. Can you suggest me a solution.

  • @BigAlpha365
    @BigAlpha365 Рік тому

    I can't get the notepad data on a separate notepad. it only appears in the programs.. anyone who knows how to activate this with this program?

  • @tugbamacit4224
    @tugbamacit4224 3 роки тому

    Hello Dr. Hays, thank you for sharing this useful technic. I have a question though, can we implement different Mach numbers in this software? I see it is fixed at Mach 0. Thanks again...

    • @berenicecervantes4275
      @berenicecervantes4275 3 роки тому +1

      From main menu, enter OPER to go into that menu. Then enter MACH to change Mach #

    • @tugbamacit4224
      @tugbamacit4224 3 роки тому

      @@berenicecervantes4275 thank you 😊

    • @berenicecervantes4275
      @berenicecervantes4275 3 роки тому

      @@tugbamacit4224 Of course!!! :)

    • @DrHays-go1cn
      @DrHays-go1cn  3 роки тому +1

      Betty C is right, but once the flow touches M1 anywhere, the model is done, so subsonic mach #'s only. I might also be a bit suspect of near transonic speeds. Low mach should be fine though.

  • @_JayashriSuralkar
    @_JayashriSuralkar Рік тому

    How to connect the xfoil with notepad for automation can you please tell me?

  • @kushaldgowda9519
    @kushaldgowda9519 2 роки тому

    I encountered an issue called "convergence failed" for viscous calculations. Airfoil is RAF 25.
    How can I resolve that?

  • @salmanmuhammad7789
    @salmanmuhammad7789 2 роки тому

    how to include the L/D ratio in the pacc file as it doesnt include this parameter

  • @Maydice
    @Maydice 3 роки тому

    Thank you for the video, it's very helpful! But I have one question, I'm pretty new at this stuff so if it's a stupid question, I'm sorry in advance :) When I follow your instructions, just three columns with values show up in the end, is there any setting on how to add a column for drag coefficient C_D which doesn't show up? Thank you!

    • @DrHays-go1cn
      @DrHays-go1cn  2 роки тому

      I think you are trying to output useful polar data. look up the command "pacc" which is for polar accumulation. Xfoil has a nice user guide.
      Maybe also try Xflr5 which is a GUI interface for xfoil (and much more). It makes accumulating polars and viewing plots effortless. it's also free!

  • @freyaapandoraa
    @freyaapandoraa 3 роки тому

    Hi Dr. Hays, I am trying to run Xfoil on my laptop using a linux sub system and am getting this error to do with fonts:
    Error of failed request: BadName (named color or font does not exist)
    Major opcode of failed request: 45 (X_OpenFont)
    Serial number of failed request: 26
    Current serial number in output stream: 28
    I don't suppose you know the solution to this?
    Thanks,
    Freya

  • @manelaero7709
    @manelaero7709 3 роки тому

    Hi friend, how to de-rotate airfoil please ? green line is not aligned with TR et LD edge for me. I have tried the command dero, but it doesn't work, do you have an idea how to use it, please?

    • @DrHays-go1cn
      @DrHays-go1cn  2 роки тому

      you could go in and directly edit the point file, but it's likely easier to go grab a properly conditioned point file from somewhere else to start

  • @abymarkose8261
    @abymarkose8261 3 роки тому

    from where did u download the dat file from? and how do you design a new airfoil? the upload of the same to xfoil is understood but to design and map the airfoil I am interested to learn about the same

    • @aeronerd22
      @aeronerd22 3 роки тому

      Many dat files can be found on airfoiltools.com. If you want to design your own, you could either manually enter points and graph them, use a CAD software to export a point cloud from a spline sketch, or utilize the in-built airfoil modification functions in the gdes mode of Xfoil to modify an existing airfoil into what you want.

  • @Levi_Sheridan
    @Levi_Sheridan 3 роки тому

    What course was this video produced for?

    • @DrHays-go1cn
      @DrHays-go1cn  3 роки тому

      AME2223 intro to aerospace engineering, but I'm glad people are finding it useful in many places!

    • @Levi_Sheridan
      @Levi_Sheridan 3 роки тому

      @@DrHays-go1cn thank you for making the video and sharing it with the public, I really appreciate it. Do you have any resources you could recommend for someone who is interested in optimization using xfoil?

    • @DrHays-go1cn
      @DrHays-go1cn  2 роки тому +1

      @@Levi_Sheridan Xflr5. A nice free tool that does much more than just 2D Xfoil plotting.

    • @Levi_Sheridan
      @Levi_Sheridan 2 роки тому

      @@DrHays-go1cn thanks for the reply!

  • @giuseppemarino4053
    @giuseppemarino4053 5 років тому

    Hi Dr.Hays . I have a question. There is a way to get a flow field with all streamline at a fixed Lift Coefficient on Xfoil??

    • @DrHays-go1cn
      @DrHays-go1cn  5 років тому +2

      I do not see a direct way of doing this in Xfoil. oper mode can tell you velocities at a point, but some additional post processing would be required to turn that into streamlines.
      another code similar to xfoil called "javafoil" can do streamlines for you:
      www.mh-aerotools.de/airfoils/index.htm

    • @giuseppemarino4053
      @giuseppemarino4053 5 років тому +2

      @@DrHays-go1cn I thank you for the quick answer! Thank you for the video too.

  • @justindoubikin6384
    @justindoubikin6384 3 роки тому

    Hey i am struggling to save the data files, i am not getting thrown any errors but i am not sure where it is saved to.

    • @danielstewart3507
      @danielstewart3507 3 роки тому +1

      Fancy seeing you here. Did you sort it out Justin?

    • @justindoubikin6384
      @justindoubikin6384 3 роки тому

      @@danielstewart3507 yeah honestly not sure what I did to fix it though just restarted everything and went through the process again

    • @ThundaVoltZ
      @ThundaVoltZ 3 роки тому

      I had this same issue. I had to search the file in the windows explorer (entire thing) and it took me to appdata...etc folder. So search it and you will find it

  • @rebbouhhicham9645
    @rebbouhhicham9645 Рік тому

    Worst experience ever