Nope!



The pressure at "1" is higher than at "2" because the fluid speed at "1" is lower than at "2".

Please, we are not proving the venturi principle here. One guy calls it a nozzle and soon we are discussing Spray guns and Carburetors.

We are not. Although the geometry and the physics are similar to our apparatus, Giovanni Batista did that work already.
We are talking about compressing air in a continuios flow by preventing the natural tendency of it to accelerate through a constricting inlet pipe.

Put another way, the air has energy applied to it by a mechanical movement, ie the tube moving thru it. As the tube constricts the air volume, the air will accelerate as the energy must dissapate or the air will have to compress. A condition it will resist as it wants to remain ambient or in stagnation.

Since more air is constantly available to enter the inlet orfice, the air has no choice but to compress unless the exit orfice allows it to exit and to do so at a higher velocity than the movement of the tube thru it. Venturi
This is all understandable and fairly agreed as understood here. The key to ram air apparatii is the application to the Throttle Body. So long as less air volume is consumed by the engine thru the TB than the ram orfice can collect, the incoming air has no way to dissapate the applied energy and must therefore compress.
Now we can argue about how usable that minute compression might be but we cannot deny that it compresses. Here then is latent energy which will dissapate by filling any void; read low pressure, read vacuum, area in the intake, TB or manifold. Thus meaning the downward movement of the piston, which draws in the air and normaly creates a lower pressure, AKA lower concentration of O2 laden gas (air), in the manifold, will have some compensation from the, albeit feebly, pressurized air supply.

To suggest it is useful may be a boast. But to suggest it dosen't exist ignores the simple physics.

Finally, the temperature of the air does not actually change in a venturi. The concentration of the BTU's, or calories of heat, simply increase and then decreases. This because the air compresses and then decompresses. Wa La!

Thanks for providing the proof there pal.

Ram jets do not need to operate at supersonic speeds. They are useful for missles at supersonic speeds, but seldom used for jet planes. I am guessing as I cannot recall a supersonic plane so equipped.


roadster with a stick

BTW water does not compress so it does not flow like gases do. Gases can decompress to fill a void. Or compress to flow through a small orfice. Water will "cavitate" or boil in a negative pressure area around a bend or exiting a narrowed fitting into a larger pipe. This uses a lot of energy and often makes plumbing noisy.