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MapleSim Hydraulics Library from Modelon

Metering Ori No States Given Area  Metering orifice with a specified area and laminar/turbulent flow without cavitation

The pressure drop is modeled as in the component Metering Ori No States. The orifice dimension is given by the value at the input connector as a diameter in m.

Connections

Name

Description

Modelica ID

portA

Layout of port where oil flows into an element (0<mflow, pB<pA means 0<&Delta;p)

port_A

portB

Hydraulic port where oil leaves the component (mflow<0, pB<pA means 0<&Delta;p)

port_B

oil

 

oil

Acommanded

Commanded Area

commandedArea

Parameters

General Parameters

Name

Default

Units

Description

Modelica ID

&Delta;Tsystem

0

K

Temperature offset from system temperature

dT_system

Transition

1

 

Transition model

Transition

k1

10

 

Laminar part

k1

k2

2

 

k2&equals;1Cd2

k2

Cd

1k2

 

Max discharge coefficient

C_d

λc

2k1k2

 

Critical flow number

lambdac

Constant Parameters

Name

Default

Units

Description

Modelica ID

orif

2

 

Orifice dimension

orif

flowcond

1

 

Flow condition

flowcond

reg type

0

 

Regularization type

regtype

reg param

0

 

Regularization parameter

regparam

cavitation

false

 

Cavitation

cavitation

checkvalve

false

 

 

checkvalve

0

m

Orifice length; 1<d

length

trans

0

 

Transition Reynolds number

Re_trans

ptrans

0

Pa

Transition pressure

p_trans

pclosed

0

Pa

Cracking pressure

p_closed

Gleak

0

m3sPa

Leakage conductance

G_Leak

Constants

Name

Value

Units

Description

Modelica ID

&alpha;[k]

0.649

 

 

alpha_k

See Also

Metering Ori No States, Restrictions, MapleSim Hydraulics Library from Modelon Overview


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