I was surprised to get this notice that you had replied to my inquiry. I'm happy to hear from you. I too had forgotten that I'd even written you an inquiry.
In the past few months I've been working on a completely new design for powering Pneumatic Air Rifles. (for target and sporting purposes)
It involves the use of "Air Amplifiers" and "Air Nozzles" similar to what you see on shop air nozzles and such.
Although I have my theory in place and some drawings on my CAD files, I have yet to attempt to make my first prototypes because I was hoping to gather some information about the functions of "Air Nozzles" in general.
I'll start with this first question. Hopefully I won't come across like an ignorant Jack-Ass but here goes.
When it comes to these modern Air Rifles, working with air pressures at or around 3000 PSI is the norm for the more powerful models.
By using a carefully calibrated "Air Amplifier" and "Air Nozzle" setup, I believe I can greatly reduce my On-Board PSI levels while at the same time increasing the volume of
air expelled from my On-Board Air Reservoir to propel my projectile.
Here is the first of my questions.
On a typical shop-type air nozzle, is there a formula one can use to determine the output velocity of the air flowing through it at a given Air-Input-PSI?
For example: At a common 90 PSI, when blown through a typical Air Nozzle, how much velocity is gained when compared to that same 90 PSI being blown through an air hose with no kind of fitting on the end; blowing directly out the end of the air hose?
Is the increase in velocity on the output end of the air nozzle a linear increase; wherein you can expect that with an increase of input-PSI you will automatically have an expected and constant increase in output velocity?
I hope my questions make sense. If they don't, then please don't worry about it. I'll have to figure it out the hard way.