#SOLIDWORKS FLOW SIMULATION VS FLOXPRESS FULL#
I have no idea what temp the powders burn at, but the gas exiting the muzzle is enough to turn cans cherry red on full auto. So endcap pressure should be 60kpsi/6/3/20=167psi !!! So, if the Muzzle pressure is roughly 1/6 peak Chamber pressure, then you triple volume and stretch normalization rate by 20x. My goal was to increase pressure normalization to 20-40 times unrestricted rate.
I just used published commercial build figures for outer wall thickness and doubled the baffle thickness for the blast baffle. I also included pressure loss due to heat exchange. I "guesstimated" the pressure loss through the boreline. I wish that I would have known all this extra theory. When I first started dabling in suppressor design, I just used Ideal Gas Laws. An unofficial, but commonly used standard is standard ambient temperature and pressure (SATP) as a temperature of 298.15 K (25 ☌, 77 ☏) and an absolute pressure of 100 kPa (14.504 psi, 0.987 atm). Use Environmental Pressure if a vortex crosses an opening.StalkerBoy wrote:I was certain of all the gentlemen on this forum who have some experience in this field, there would be one person who'd be able to set me in the right direction, if not on an alternate route. In summary, you should see no difference between Static/Total versus Environment Pressure opening boundary conditions except in the case of a vortex. Notice that arrows point inwards and other arrows point outwards. For an example of a vortex crossing an outlet see the image below. This boundary condition treats outgoing fluid as static pressure and incoming as total pressure. Once again, only in the case of a vortex across an outlet in order to maintain conservation of energy, we use the Environmental Pressure boundary condition. When users assign total pressure, then our system loses energy.
In the case of a vortex, if we assigned static pressure then our system will gain energy. It is possible for a vortex to exist at an outlet. Steady state in a vacuum is the absence of any flow field. If the user neglects to assign a boundary condition at an opening, then the opening would be analogous to encountering a vacuum. At the boundaries of an internal flow analysis in Flow Simulation one must specify the pressure from the outside fluid as either Static or Total (depending on how the pressure was measured). In an atmosphere, fluids in an open system will always encounter another fluid. Users have two ways of defining pressure openings, either by applying a pressure value they have measured (static or total) or leaving it open to the environment. The remaining pressure opening boundary condition, Environment Pressure, is not a measured quantity. Dynamic pressure is due to the kinetic energy in the fluid. When you subtract the static pressure from the total pressure the resultant quantity is called dynamic pressure.
Some devices can measure both static and total pressure. Total pressure, sometimes known as stagnation pressure, must be measured by a device that brings the flow to rest without loss. Static pressure must be measured by a device that introduces no velocity change to the flow and is most commonly measured with a manometer or a pressure gauge. Static and Total Pressure are measured quantities. What are these 3 types of pressure openings? Have you ever added boundary conditions in SOLIDWORKS Flow Simulation and wondered why there are 3 different pressure opening options? This blog is for you then! You will learn how the 3 different types ( Environmental, Static, and Total Pressure) vary in use and will have a basic understanding of when to use each.
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