12-01-2022, 01:44 PM
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#1 (permalink)
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NASA: thumbs down on VSAERO shape factor H
If this link succeeds, it's an empirical evaluation by NASA, to validate the capability to predict the flow separation location on a body, based upon the Electronic Data System's VSAERO, mentioned by Goro Tamai, in his book, The Leading Edge.
The title of the thread foreshadows their results.
https://ntrs.nasa.gov/api/citations/...9890010727.pdf
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12-01-2022, 06:53 PM
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TLDR;
Figure 27 appears to imply an attached wake from an integrated half-body will lift itself clear of the larger surface due to it's internal dynamics. Correct?
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12-08-2022, 01:47 PM
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' TLDR... Figure 27'
Quote:
Originally Posted by freebeard
TLDR;
Figure 27 appears to imply an attached wake from an integrated half-body will lift itself clear of the larger surface due to it's internal dynamics. Correct?
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Can you tell us where that comes from? I haven't a clue.
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12-08-2022, 05:25 PM
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It's the second figure on page 30 of the PDF you linked to.
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12-08-2022, 05:43 PM
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Fig 27, page-30
1) I cannot associate that structure with anything related to an automobile.
2) There is no streamlined half-body depicted anywhere.
3) Half-bodies aren't ever 'ON' surfaces.
4) In fluid mechanics, there's no such thing as 'internal dynamics.'
5) Half-bodies do not have wakes. They're 'streamlined', incapable of generating a wake. Just a bit of TBL sloughing off the trailing edges.
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Last edited by aerohead; 12-08-2022 at 05:52 PM..
Reason: add data
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12-10-2022, 10:38 AM
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The rotor hub has such a shallow slope or shape, yet so much turbulence.
Must be a tough environment with those large helicopter rotors swirling around.
Not the results I would have expected.
I guess this makes Frisbees and flying saucers candidates for the non-aerodynamic thread.
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