Quote:
Originally Posted by Stan Weiss
Mark,
Do you have any high end CFD software at work where this type of thing could be done Stan
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No. But have evaluated CAD abilities for "in-pipe" flow (including thermals in the fluid-air) vs propeller environments. Solid Works, et al is fantastic for "in-pipe" flow of intakes and exhausts.
Toughest part was getting the intake runner shape into CAD: hand-held scantools exist now to scan a runner mold into CAD, clean any warts, and go.
Yet, FWIW, a PSA:
However, propeller/wing evals are bogus on 100% of the CAD-Sims out there, SW being just okayreason is all propeller (car drag coeficient too) SW environments put the air volume in motion (air has momentum, this has the energy!!) and keep the propeller (vehicle, wing etc) in a fixed position, like a wing tunnel. So 100% of the Reference models are "standing on their head" yet the professional go by the results for mediocre aircraft. NASA Ames had a chance to turn that around over a decade ago, but propriety has kept it to "ya cannot CAD that until ya spend the money to develop the CAD equations from models: empirical data required to make models.
Very clever propeller code does exists by/with a tiny few applied to competition use (thrust, noise, smooth), but doesn't see daylight nor the internet due to propriety, and awaiting funding to pay for their sweat equity. Proposals into our Mil have gone uninterested despite the begging need to keep our Mil propeller plane crew from nausea from props drumming the fuselage. A big deal.
Such open-air flow-code would be in the same boat as Vizards camshaft synthesis tool. Adopt when funded the work to develop the code for physical models-in-motion. Who wants to run models in motion THRu STILL AIR, to record the forces in X, Y, Z? Decades...