I am using PTC Creo 7.0 and want to analyse the behaviour of pressure in a braking system. I was thinking to use a simplified model consisting of a length of brake line (4.8mm bore) connected to a piston inside a cylinder. (35mm diameter with 0.5mm stroke)
I would then introduce restrictions in the brake line and analyse the effect on pressure build up behind the piston.
Does anyone have experience with a model similar to this?
As a starting point, I have created a transient flow analysis of a simple brake line with a restriction, but without the piston element: the brake line is set with 8000000Pa inlet pressure and 0Pa outlet pressure but this is not yielding the expected results (i.e. a ramp up in pressure from zero, finishing with the outlet pressure equaling the inlet pressure).
This is the result I obtain currently:
Looks o.k. so far, however if I simulate a number of different restriction diameters, I get this:
I would expect final outlet pressure to equal input pressure once the system reaches equilibrium if I have modelled it correctly - the results make me think my chosen model settings are wrong somewhere.
Inlet and Outlet settings are:
Inlet:
Outlet:
Any ideas where I might be able to improve this?
Thanks very much for any help!
