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https://www.sciencedirect.com/science/article/pii/S1000936116300383

Very interesting study that shows that using a winglet on the pressure side of a rotor cascade improves rotor performance, particularly by extending the stall point. In other words, the pressure side winglet creates a higher pressure ratio at a lower rotor speed. This is achieved while having a negligible impact on drag.

"On the contrary, the
pressure-side winglet greatly improves the stall margin and
introduces only a very small penalty in efficiency. At peak efficiency point, there is an efficiency reduction of about 0.27%.
The predicted penalty in rotor isentropic efficiency is due to
the additional surface offered by tip winglet which increases
the additional skin friction loss. Moreover, the pressure-side
winglet causes a slightly higher pressure ratio near the stall
point relative to the reference case..."

"By applying pressure-side winglet, the stall range predicted
by the present work is extended by 33.74%. This shows a significant improvement in the stall range of the compressor
rotor."

This is highlighted in this image.
https://files.catbox.moe/37sing.png

The study further goes on to say

"In the condition with the suction-side winglet
applied, the shock wave/tip leakage vortex interaction is being
intensified which leads to a stronger change in the tip leakage
vortex structure. It is found that the tip leakage twists seriously
and a spiral type breakdown seems to occur at the middle of
the rotor passage. In the case with pressure-side winglet, the
tip leakage vortex trajectory is more inclined in the streamwise
direction. In addition, the distance from the first tip leakage
vortex appearance at the suction surface to the intersection
with the shock is longer than the corresponding distance in
baseline tip case. With the longer distance, the low momentum
core fluid is reenergized as tip leakage vortex mixing with main
flow."

https://files.catbox.moe/k2fytu.png


Not complete proof but evidence that pressure side winglets extend the stall range in a wing cascade, this would be useful in something like a current generation Formula 1 car that uses floor fences in a cascade arrangement. The regulations allow the use of the pressure side winglets as there is a 50mm fillet radius that is allowed on these cascades.


https://files.catbox.moe/ce7igv.jpg

https://www.fia.com/sites/default/files/fia_2023_formula_1_technical_regulations_-_issue_1_-_2022-06-29.pdf

3.5.2 subsection d states
"Once each Floor Fence has been fully defined it is permitted to apply a Fillet at the
boundary between it and the Floor Body, having radius of curvature no greater than
50mm. Such a Fillet would then be considered part of the associated Floor Fence."

As far as I can tell, this means that you can apply a fillet once the floor fence is within the bounds of the actual floor, it makes no mention if the fillet can be applied at the top or bottom of the floor fence.

When air flows through a venturi it speeds up, why does it do that? In simplest terms, pressure energy is converted to kinetic energy. In more accurate terms, there is a lot going on, and pressure itself while being the prime mover, is only part of the equation. Part of the reason a venturi even works, is because there is imperfect pressure recovery, due to entropic losses, thus the outlet is always at slightly lower pressure than the inlet. High pressure always flows to low, thus the venturi outlet acts as a favorable pressure gradient for air to follow.

If the pressure in the outlet is lower than the pressure at the inlet, the flow will follow the path of least resistance and naturally seek the outlet.

When you use a shop air hose, the pressure in the hose is much higher than atmospheric, the pressurized air expands into ambient. Now, if you lower the pressure of the ambient air at the discharge point, the air that comes out of the air hose rushes out with even more force, because there is less ambient air pressure acting as a restriction.

This is the principle behind air amplifiers.

https://www.youtube.com/watch?v=6HeagI8Tkh0

Therefore, the effectiveness of a venturi lies not just on the inlet pressure, but the outlet pressure as well.

The taoist principle of yin/yang separation generates power is highlighted here, the higher the separation of high and low pressure, the faster the air moves.

And to add weirdness, if you separate a positive and a negative electrical charge with a non-conductive material, at a certain current and voltage you begin ionizing the air around the charge separation. The so called dielectric barrier discharge, which can be used to influence airflow.

https://www.youtube.com/watch?v=HU0WPt9rKaI

Is to isolate the motion of the *front knee. There is no one way to do this, but it is very difficult to do.

https://www.youtube.com/shorts/DK9bIkQg4yc

Here you can see a perfect demonstration of the principle in action.

The knee can go up and down, but it cannot wobble side to side, or twist, it must work like a hydraulic jack, only moving up and down.

By loading the front knee with the weight of your torso, you keep the knee from buckling. This allows you to turn the upper torso independently of the lower.

This is in accord with Taoist principles, in order to generate power, there must be a yin yang separation. In this case, the legs are solid, the torso is pliant. That separation delivers great power and knocks the fuck out of the nigger.

https://www.carthrottle.com/post/can-you-improve-a-cars-aerodynamics-by-making-it-vibrate/

This follows experiments in the lab where piezoelectric actuators were used to induce traveling waves along the surface of an airfoil. It was found that low amplitude traveling waves between 6-10hz would destructively interfere with vortex shedding. This reduced drag and allowed greater AoA.

Can you turn your waist without turning your knee? No, most of you will toss your hip by turning your knee. You've lived your whole life doing this because you're afraid of your own momentum. By tossing your hip, and turning your knee when you turn your waist you're dissipating all your energy, wasting it. By not moving your knee when you turn your waist you keep all your energy. Even people that have practiced for years can't do this automatically. If you brace your front knee against something, like a couch or door frame, or bed, you see how easily your energy travels from your back foot, to your lead hand.

https://cdn.star.nesdis.noaa.gov/GOES16/ABI/SECTOR/gm/07/GOES16-GM-07-1000x1000.gif
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