I am curious how you solve corrosion in a high pressure thermal cycling environment for what are presumably very tiny water fog nozzles. But maybe that is trade secret or whatever.
Naively I'd just switch out the air for N2, since it's mechanically the same and cheap. But then, once you're using special gas, I'd look at using low and high molecular weight (say, He and maybe some long chain which isn't going to detonate under the working pressure?), and maybe other stuff, to see if it would improve the product.
But maybe corrosion isn't a big problem -- there are some awesome alloys out there. I want to get into firearm sound suppressor design and manufacture (custom, tuned for a given weapon and load) just to justify an HPC/CFD capability and a bunch of awesome Inconel and other alloy samples.
The problem with low molecular weight gasses is that they lead to embrittlement of any metal in contact with them and that they leak past your seals something fierce. Both due to their small size.
He2 is also very expensive and H2 is very reactive which is not good either..
You have to choose the right materials of course. That's part of it. Then you should avoid too many minerals in your water -- recycle the water in a closed process.
Air is nice because you don't have to hold onto it at low pressure :-)
Naively I'd just switch out the air for N2, since it's mechanically the same and cheap. But then, once you're using special gas, I'd look at using low and high molecular weight (say, He and maybe some long chain which isn't going to detonate under the working pressure?), and maybe other stuff, to see if it would improve the product.
But maybe corrosion isn't a big problem -- there are some awesome alloys out there. I want to get into firearm sound suppressor design and manufacture (custom, tuned for a given weapon and load) just to justify an HPC/CFD capability and a bunch of awesome Inconel and other alloy samples.