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MapleSim Hydraulics Library from Modelon

Flow Source  Constant flow source with internal leakage

The Flow Source component describes a flow source with internal leakage.

Implementation 

See component Id Flow Source. The delivered flow rate at the outlet port of this component may be different because of flow into the lumped volume and external leakage to component tank.

 

Equations

Variables

Connections

Parameters

Equations

T=T0oil+ΔTsystem

pabs=pB+patmoil

Variables

Name

Value

Units

Description

Modelica ID

psat

[1]

Pa

Gas saturation pressure

p_sat

Vol

 

 

 

Vol

tank

 

 

 

tank

pabs

 

Pa

Absolute pressure, used for all property calls

p_abs

T

 

K

Local temperature

T

ρsummary

[2]

kgm3

Density

summary_rho

pBsummary

pB

Pa

Pressure at port B

summary_pB

IFS

 

 

 

IFS

[1] oil.gasSaturationPressureT=T,vgas=oil.vgas

[2] oil.densityp=pabs,T=T,vair=oil.vgas,psat=psat

Connections

Name

Description

Modelica ID

oil

 

oil

portB

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

port_B

commandSignal

Connector of input signal used as flow rate

commandSignal

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

G

5.·10-12

m3sPa

Conductance of pump leakage

G

use volume B

true

 

If true, a volume is present at port B

useVolumeB

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

qbias

0.001

m3s

Bias of flow rate

qbias

qamp

0

m3s

Amplitude of sinusoidal flow rate

qamp

qfreq

0

Hz

Frequency of sinusoidal flow rate

qfreq

qphase

0

rad

Phase shift

qphase

Oil Parameters

Name

Default

Units

Description

Modelica ID

VB

10-6

m3

Geometric volume at port B

volumeB

Constant Parameters

Name

Default

Units

Description

Modelica ID

use input

false

 

If true, input port is present

useInput

See Also

Id Flow Source

Pumps

MapleSim Hydraulics Library from Modelon Overview

 


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