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MapleSim Hydraulics Library from Modelon

Line Entrance  Entrance element of a long line

The LineEntrance component contains the equations for the entrance element (that is, the beginning of a long line). The connector port_A is used to connect the long line to another hydraulic component.

Connections

Name

Description

Modelica ID

oil

 

oil

portA

Port A, where oil flows into the component (0<q, pB<pA means 0<&Delta;p)

port_A

portB

Port A, where oil leaves the component (q<0, pB<pA means 0<&Delta;p)

port_B

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

steady-state init

false

 

If true, initialize in steady state

steadyStateInit

constant properties

true

 

If true, properties are treated as constant over time

constantProperties

elastic wall

false

 

If true, pipe properties affect speed of sound in oil

elasticWall

dynamic friction

false

 

If true, dynamic friction

dynFriction

element

 

m

Length of one element

ElementLength

d

 

m

Line diameter

diameter

&Delta;h

0

m

Height difference

heightDiff

friction type

[1]

 

Type of flow model

frictionType

Kpipe

 

 

Pipe bulk modulus of elasticity

bulkModPipe

roughness

0

m

Roughness of pipe

roughness

ρ0

 

kgm3

Constant density, if constantProperties is true

rho0

ν0

 

m2s

Constant viscosity, if constantProperties is true

nu0

β0

 

Pa

Bulk Modulus

beta0

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

[1] Hydraulics.Lines.FrictionTypes.Laminar

Constant Parameters

Name

Default

Units

Description

Modelica ID

Δrel

roughnessd

 

Relative roughness

Delta

Constants

Name

Value

Units

Description

Modelica ID

k1

0.192

 

 

k1

k2

0.0948

 

 

k2

k3

0.0407

 

 

k3

τ1

0.25

 

 

tau1

τ2

0.0352

 

 

tau2

τ3

0.0024

 

 

tau3

See Also

Lines, MapleSim Hydraulics Library from Modelon Overview


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