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Old Apr 13, 2013, 12:42 PM
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Yak 52's Avatar
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Quote:
Originally Posted by kcaldwel View Post
You just need MATLAB Component Runtime (MCR) that is free from Mathworks:

http://www.mathworks.com/products/co...mcr/index.html

Any of the lifting line or VLM codes are really pretty simple things that will not model the more complex flow on a wing, only produce linear wakes, and most do not include any facility to model low Re effects. XFLR5 attempts to do that, but...

The problem with relying on XFLR5 too much is it cannot properly rank the efficiency of planforms even at high Re. It will guide you in the wrong direction for planform shape and tip airfoils.

We really need a high order panel code to do the level of analysis many people want to do, but that requires a lot of computer power and the programs are very expensive as well. There is a free Linux code called Open Foam that can potentially do that, but the learning curve will be very steep for most of us:

http://www.openfoam.org/

Kevin
Thanks. Since reading your thread I've adjusted my approach so as to not bother modelling curved or raked wing tips too closely, just approximating the the planform so as not to add loads of chord positions.
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Old Apr 22, 2013, 06:50 PM
Sink stinks
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United States, GA, Atlanta
Joined Apr 2005
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Quote:
Originally Posted by kcaldwel View Post
You just need MATLAB Component Runtime (MCR) that is free from Mathworks:

http://www.mathworks.com/products/co...mcr/index.html

Any of the lifting line or VLM codes are really pretty simple things that will not model the more complex flow on a wing, only produce linear wakes, and most do not include any facility to model low Re effects. XFLR5 attempts to do that, but...

The problem with relying on XFLR5 too much is it cannot properly rank the efficiency of planforms even at high Re. It will guide you in the wrong direction for planform shape and tip airfoils.

We really need a high order panel code to do the level of analysis many people want to do, but that requires a lot of computer power and the programs are very expensive as well. There is a free Linux code called Open Foam that can potentially do that, but the learning curve will be very steep for most of us:

http://www.openfoam.org/

Kevin
OpenFoam does panel methods? I thought it was only full CFD (full grid and Euler or Navier-Stokes solutions).
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Old Apr 28, 2013, 04:02 PM
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If anyone's interested in the Vortex Lattice program I've been using for some of the analysis I've shown in this thread (and a few others), it's available for iPad (for free) here:

https://itunes.apple.com/us/app/ivl/id635617735

You can download the manual here:

http://ivlsupport.wordpress.com

Both are still works in progress so thanks in advance for your patience. Among other things, it should be a pretty accurate tool placing CGs with complex geometries.
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Last edited by ShoeDLG; Apr 28, 2013 at 04:12 PM.
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Old Apr 28, 2013, 04:37 PM
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Nice one! I really like the way you present results with it. Just wish I had an iPad
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Old Apr 28, 2013, 09:50 PM
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Malaysia, Selangor, Kajang
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Quote:
Originally Posted by ShoeDLG View Post
If anyone's interested in the Vortex Lattice program I've been using for some of the analysis I've shown in this thread (and a few others), it's available for iPad (for free) here:

https://itunes.apple.com/us/app/ivl/id635617735

You can download the manual here:

http://ivlsupport.wordpress.com

Both are still works in progress so thanks in advance for your patience. Among other things, it should be a pretty accurate tool placing CGs with complex geometries.
Is there a version for the iPhone? Don't need fancy UI really just need to plot the results so the screen size of the iPhone shouldn't really be a limitation.
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Old Apr 29, 2013, 05:48 AM
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No, no iPhone version. There's no technical reason there couldn't be, but "shoe-horning" the interface to fit on the iPad was challenging enough (the interface for defining the configurtion demands more real estate than the interface for displaying the results). I think an iPhone implementation would make for a truly frustrating user experience.
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Old Apr 29, 2013, 10:50 AM
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That's too bad. I'd like to give it a try on my iPod, but I can imagine it would probably be pretty hard to display anything meaningful on such a small screen.
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