Quote:
Originally Posted by Adger Smith
Wow! Someone finally brought it up.. Thanks Dwight.... Fall fronts are different from Spring fronts. You may have the same DA's, but you can get the same DA's with a totally different set of air/weather readings. If the program is not set up(written) to allow for this, you will see variations in the final #'s. That is just one of those things as well as the human element that keeps numbers from repeating exactly or being exactly the same. Then I might add the computer differences. Not all the same Algorithms are used to do the different programs used for correction. Small differences are there yet the Laws of Physics are not cheated and are still in place.
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Yep; there is a lot involved to get the right numbers and it can get a bit complex many times when you start to apply CFD concepts.
Just attended a class on Computational Fluid Dynamics (CFD) sponsored by NASA and it confirms the many things that can affect flow numbers.
Had an interesting discussion with the instructor on how temperatures can effect the final numbers and behavior. Also discussed the importance about velocity and its effects on obtaining real CFM numbers..