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Modeling Hydraulic Systems
pressure loss coefficient at each outlet. The block computes the volume of fluid in the
tank and exports it outside through the physical signal port V.
• Variable Head Three-Arm Tank — Represents a three-arm pressurized tank, in
which fluid is stored under a specified pressure. The pressurization remains constant
regardless of volume change. The block accounts for the fluid level change caused by
the volume variation, as well as for pressure loss in the connecting pipes that can be
caused by a filter, fittings, or some other local resistance. The loss is specified with the
pressure loss coefficient at each outlet. The block computes the volume of fluid in the
tank and exports it outside through the physical signal port V.
Low-Pressure Fluid Transportation System
The following illustration shows a simple system consisting of three tanks whose bottom
surfaces are located at heights H1, H2, and H3, respectively, from the reference plane.
The tanks are connected by pipes to a hydraulic manifold, which may contain any
hydraulic elements, such as valves, orifices, pumps, accumulators, other pipes, and so on,
but these elements have one feature in common – their elevations are all the same and
equal to H4.
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