MapleSim Hydraulics Library from Modelon - MapleSim Help

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MapleSim Hydraulics Library from Modelon

Skydrol_IV $—$ Tabular data for Skydrol IV

Base model for a hydraulic table-based medium

Required inputs:

 • Bulk modulus data as function of pressure and temperature
 • Viscosity data as function of pressure and temperature.
 • Density data as function of temperature at atmospheric pressure

Data format

See Tabular Oil for the data format for the tables.

Parameters

General Parameters

 Name Default Units Description Modelica ID ${T}_{0}$ $293.15$ $K$ Working temperature T0 ${p}_{0}$ ${10}^{7}$ $\mathrm{Pa}$ Reference pressure p0 ${p}_{\mathrm{vapour}}$ $100$ $\mathrm{Pa}$ Absolute vapour pressure p_vapour ${p}_{\mathrm{atm}}$ ${10}^{5}$ $\mathrm{Pa}$ Atmospheric pressure: in case change is wanted for high altitudes p_atm display labels $\mathrm{false}$ Display labels display_labels from file $\mathrm{false}$ Read table data from file from_file kinematic viscosity data $\mathrm{true}$ If true, the viscosity data is kinematic else dynamic kinematicViscosityData file name $"NoName"$ file_name density table name $"NoName"$ Table for density at p = 1 bar abs density_T_table_name viscosity table name $"NoName"$ Table for viscosity viscosity_table_name bulk modulus table name $"NoName"$ Table for bulk modulus bulk_modulus_table_name density table Density tabular data at p = 1.0 bar.  See Tabular Oil for format; see graph, below. density_T_table viscosity table Dynamic viscosity tabular data.  See Tabular Oil for format; see graph, below. viscosity_table ${\mathrm{log}}_{\mathrm{base}}$ $10$ Logarithmic base for tabulated viscosity log_base bulk modulus table Bulk modulus tabular data.  See Tabular Oil for format; see graph, below. bulk_modulus_table density smoothness [1] Smoothness of density table interpolation density_smoothness viscosity smoothness [1] Smoothness of viscosity table interpolation viscosity_smoothness bulk modulus smoothness [1] Smoothness of bulk modulus table interpolation bulk_modulus_smoothness

[1] $\mathrm{Modelica.Blocks.Types.Smoothness.ContinuousDerivative}$

Gas Parameters

 Name Default Units Description Modelica ID ${v}_{\mathrm{gas}}$ ${10}^{-6}$ $1$ Gas/(hydraulic medium) volume fraction  at atmospheric pressure and 0 degC v_gas $\mathrm{av}$ $6.8$ Bunsen coefficient av ${\mathrm{\rho }}_{\mathrm{gas}\left(0\right)}$ $1.28$ $\frac{\mathrm{kg}}{{m}^{3}}$ Gas density at atmospheric pressure and 0 degC rho_gas_0 ${\mathrm{\nu }}_{\mathrm{gas}}$ $1.5·{10}^{-5}$ $\frac{{m}^{2}}{s}$ Gas kinematic viscosity nu_gas

Constant Parameters

 Name Default Units Description Modelica ID $A$ $0$ Coefficient for temperature dependent viscosity A $B$ $0$ Coefficient for temperature dependent viscosity B $\mathrm{\alpha }$ $0$ Coefficient for pressure dependent viscosity alpha

Constants

 Name Value Units Description Modelica ID ${T}_{\mathrm{ref}}$ $273.15$ $K$ Reference temperature for v_air T_ref ${p}_{\mathrm{ref}}$ ${10}^{5}$ $\mathrm{Pa}$ Reference pressure for v_air p_ref

 See Also

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