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MapleSim Hydraulics Library from Modelon

Orifice None  For replacement of pressure drops with no component (line without pressure drop)

The Orifice None component describes the laminar/turbulent flow through an orifice if no cavitation occurs. The flow rate of the orifice is given by:

Δp=0.

Related Components

Name

Description

Lam Res No States

Resistance with laminar flow.

Var Lam Res No States

Resistance with laminar flow and externally commanded conductance.

Orifice No States

The component, based on the loss coefficient K, describes both flow regimes: laminar for very small Reynolds numbers and turbulent for higher Reynolds numbers (default model).

Ori Poly No States

The component describes both flow regimes, using an interpolation polynomial.

Ori Cav No States

Orifice component checking for cavitation.

Sim Ori No States

Simple textbook component, using a constant discharge coefficient. It is valid for turbulent flow only; severe numerical problems for laminar flow.

Metering Ori No States

Metering Orifice (that is, model Orifice No States with variable diameter).

Two Orifices

Two orifices in series, one with variable the other with fixed flow area.

Restrictions[Basic]

Differences between basic models are shown by a figure.

Connections

Name

Description

Modelica ID

portA

Layout of port where oil flows into an element (positive m_flow, port_A.p > port_B.p means 0<&Delta;p)

port_A

portB

Hydraulic port where oil leaves the component (negative m_flow, port_A.p > port_B.p means 0<&Delta;p)

port_B

oil

 

oil

Parameters

Name

Default

Units

Description

Modelica ID

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

See Also

Lam Res No States, Metering Ori No States, Ori Cav No States, Orifice No States, Orifice No States, Restrictions, Restrictions[Basic], Sim Ori No States, Two Orifices, Var Lam Res No States, MapleSim Hydraulics Library from Modelon Overview


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