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wind tunnel scaling question

  • 17-06-2013 1:40pm
    #1
    like a ninja
    Registered Users, Registered Users 2 Posts: 23 ✭


    My question is in relation to scaling of wind speed in a wind tunnel. Lets say i had a 1/100 scale model in a wind tunnel and the real life application is ran at 65m/s. According to my research it tells me that froude scaling theory is used where fr = v^2/Lg (v=velocity,L = lenght) from this it tells me that the wind tunnel test should be ran at 6.5m/s, does sound correct?


Comments

  • #2
    bnt
    Registered Users, Registered Users 2 Posts: 13,075 ✭✭✭✭bnt


    I don't know that Froude Scaling is the best tool for this job. What about using a Reynolds Number? It's widely understood and used for these questions, AFAIK.

    You are the type of what the age is searching for, and what it is afraid it has found. I am so glad that you have never done anything, never carved a statue, or painted a picture, or produced anything outside of yourself! Life has been your art. You have set yourself to music. Your days are your sonnets.

    ―Oscar Wilde predicting Social Media, in The Picture of Dorian Gray



  • #3
    Darren1o1
    Registered Users, Registered Users 2 Posts: 744 ✭✭✭Darren1o1


    like a ninja wrote: »
    My question is in relation to scaling of wind speed in a wind tunnel. Lets say i had a 1/100 scale model in a wind tunnel and the real life application is ran at 65m/s. According to my research it tells me that froude scaling theory is used where fr = v^2/Lg (v=velocity,L = lenght) from this it tells me that the wind tunnel test should be ran at 6.5m/s, does sound correct?

    Try fluid mechanics by Frank White. It is the dimensional analysis section. I believe reynolds number covers it. What are you looking to solve as a cause? Coefficient of force?


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