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Search: Posts Made By: henra
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Forum: Tech Log
3rd Apr 2013, 08:32
Replies: 388
Views: 99,886
Posted By henra

Technically speaking you are obviously correct....

Technically speaking you are obviously correct. As soon as the static pressure on a medium increases there will be compression (That's true not only for a gaseous medium, even your wood furniture...
Forum: Tech Log
4th Dec 2012, 20:53
Replies: 388
Views: 99,886
Posted By henra

That is why I'm still convinced that the downwash...

That is why I'm still convinced that the downwash behind the wing leads to a 'choking' of the mass stream underneath the wing as it displaces the streamlines normally exiting along the lower surface...
Forum: Tech Log
30th Nov 2012, 17:53
Replies: 388
Views: 99,886
Posted By henra

I don't see a contradiction there necessarily. ...

I don't see a contradiction there necessarily.
The downwash behind the TE will displace the air beneath/behind the airfoil thereby reducing the area where the mass flow underneath the wing from the...
Forum: Tech Log
18th Nov 2012, 22:11
Replies: 388
Views: 99,886
Posted By henra

I also seem to remember it was Coriolis. But in...

I also seem to remember it was Coriolis. But in contrast to popular belief not due to rotation of the Earth.

IIRC it is simply that any existing rotation in the water amplifies due to the small...
Forum: Tech Log
23rd Oct 2012, 18:50
Replies: 388
Views: 99,886
Posted By henra

Although I don't want to get involved in this...

Although I don't want to get involved in this somewhat personal argument I'm afraid he is right insofar as for the balance inside a certain frame of reference it is absolutely irrelevant which of the...
Forum: Tech Log
20th Oct 2012, 08:59
Replies: 388
Views: 99,886
Posted By henra

Yes, expansion means increasing pressure. But...

Yes, expansion means increasing pressure. But increasing can mean increasing back to free stream static pressure. No discrepancy to the 'closed' system here. The same applies for the energy. Also in...
Forum: Tech Log
19th Oct 2012, 20:52
Replies: 388
Views: 99,886
Posted By henra

I take it you are a 'Newtonian' :E But if we...

I take it you are a 'Newtonian' :E

But if we assume we have high pressure on the lower side and low pressure on the upper side I fail to see why simple physics shouldn't apply:
F=p*A, p being the...
Forum: Tech Log
19th Oct 2012, 19:43
Replies: 388
Views: 99,886
Posted By henra

Interesting thought! However the problem of...

Interesting thought!
However the problem of energy conservation only significantly applies in the lower parts of the boundary layer of the wing. If you look at the speed and thus energy above the...
Forum: Tech Log
25th Jul 2012, 21:46
Replies: 388
Views: 99,886
Posted By henra

The funny thing is that both theories (Newton and...

The funny thing is that both theories (Newton and Bernoulli) are indirectly linked to each other.
Newton assumes that air behind the wing is accelerated downward. If you follow the air movement...
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