3/21/2023 0 Comments Energetic vox youtube![]() I very much agree with the approach of design build test and repeat. I was always surprised how quickly we could hack something together that would be useful in the long run for eliminating the first few prototype designs. It would be interesting over time to take a design, run it through CFD and see how close that becomes to real world testing results. You would then be able to refine that model based on the 1st hand knowledge gained from your iterative prototype testing data. I think it would be interesting or potentially valuable to buy a license for CFD software and have someone on your team take a crack at a high level model. That's mainly why I was asking because as "simple" as expanding gas in a gun muffler sounds, I could see it being a huge pain in the ass to model correctly. ![]() Yeah, I haven't had much opportunity to practice or apply CFD outside of the bare basics taught in school. Gives people a straight answer that the suppressor can "handle 2 times the amount of pressure that it would ever normally see."Ģ. Good to know you have a 2:1 SF, that may be good information to have on your website to show consumers the kind of strength that is designed into their can. Very straightforward approach and makes sense. It means a lot to have a manufacturer with presence on suppressor forums answering technical questions and showing the kind of research and decisions that go into designing a new can.ġ. With so many great choices on the market right now, a lot of decisions boil down to which manufacturer you would like to support more. View QuoteThank you for the well thought out response, some really great information in there especially for anyone researching pros and cons of cans. I realize this explosive testing is very unconventional but that is how innovation happens! Not going to lie, it is also fun to use high explosives to test anything ) We also took the rather unusual step of using high explosives (det cord) through the bore to shock stress the welds to failure to make sure we tore base metal. C300 is fairly simple to weld and very tolerant however all parts are solvent cleaned prior to welding and all welds are argon backed to protect the root. The silencers were then inspected with dye penetrate to look for any cracking and then sectioned and inspected through the cross section of the welds. We developed a HASS (highly accelerated stress screening) process to simulate thousands of heat/cool cycles then shot the HASS cycled samples. We have validated our weld process in several ways. I have a stack of prototype cans that did not make the cut!ģ. Our baffle & stack design was derived empirically with design-build-test-repeat until we achieved an attenuation, tone and mass that we felt was the right optimization. We could use a simplified gas model however once you get into multiphase (super-tran-sub sonic) flow and add thermodynamics (cans are a heat transfer device) to that it requires some serious computational horsepower, and more importantly, PhD level experience, to model and interpret. To be perfectly honest, the multi-physics CFD required to analyze a design is beyond our resources at this time. We have not used CFD for modeling the response of the silencer. We used SAAMI published data for pressures and volumes. We calculate as though the bore to the blast chamber was closed and the full volume of gas was trapped in the chambered cartridge, barrel bore and blast chamber. Yes, we consider the instantaneous peak pressure based on a number of factors. I just like to hear technical discussion from guys in the industry of one of my favorite hobbies.ġ. I understand if you can’t answer some of these in too much detail based on potential disclosure of trade secrets. What kind of weld inspection are you performing, NDI or destructive, any troubleshooting you had to work through as far as internal porosity? Great photos of the automated welding, much respect for designing and using your own system for that process. ![]() What level of CFD goes into the initial design of a baffle system? Most of the talk in here has been about material properties at operating temps, anything you can comment to on the baffle design of this can?ģ. Since there has been great talk about strength of materials at elevated temperatures I’m wondering what kind of design margin/safety factor are you looking for?Ģ. ![]() Strength calculations for a suppressor, do you consider it as a sort of modified pressure vessel? I would assume since it is not a sealed system that you are not held to ASME pressure vessel code. Just like to get a feel for what different disciplines deal with.ġ. Any time I can pick the brain of someone willing to discuss these type of in depth topics I try to ask some questions. I’ll preface with saying I work in a different industry but similar field of interest. View QuoteI’ll bite on this and try to keep the nerd discussion going:
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