Hello, I'm creating new pneumatic chamber with inlet and outlet. for such a chamber mass continuity equation would be like this:
mas accumulation rate within chamber = inlet mass flow rate - outlet mass flow rate
as I understand, expression for mass accumulation rate in chamber is the same as in constant volume pneumatic chamber already created in simscape foundation library. I modified the code of constant volume penumatic chamber:
component chamber1
nodes
A = foundation.pneumatic.pneumatic;
B = foundation.pneumatic.pneumatic;
end
variables
gas_flow = { 0, 'kg/s' };
heat_flow = { 0, 'J/s' };
pressure = { 0, 'Pa' };
temperature = { 0 , 'K' };
end
parameters
Volume = { 1e-3, 'm^3' };
p0 = { 101325, 'Pa' };
T0 = { 293.15, 'K' };
end
function setup
through( gas_flow, A.G, B.G );
through( heat_flow, A.Q, B.Q);
across( pressure, A.p, B.p );
across( temperature, A.T, B.T );
pressure = p0;
temperature = T0;
end
equations
gas_flow == Volume/A.R/temperature * (pressure.der - ...
pressure* temperature.der/temperature);
heat_flow == A.c_v * Volume / A.R * pressure.der;
end
end
it works when I conect pressure source, new chamber, orifice and atmospheric reference, but I have doubts about the results. And it won't work when I connect pneumatic pump made of rotational pneumatic converter (this pump works when I don't use my new chamber). maybe I missunderstood something, and that somebody will help me with this.
P.S. if my question is unclear, please wright to me and i will clarify it.
