Poppet Lift $—$ Ball poppet lift with sharp edge seat

This is a model of a poppet lift.

Connections

 Name Description Modelica ID $\mathrm{supportA}$ supportA $\mathrm{supportB}$ supportB $\mathrm{flangeA}$ flangeA $\mathrm{flangeB}$ flangeB $\mathrm{oil}$ Fluid property model oil $\mathrm{portA}$ portA $\mathrm{portA1}$ portA1

Parameters

General Parameters

 Name Default Units Description Modelica ID $L$ $m$ Element length L $\mathrm{reverse}$ $\mathrm{false}$ Reverse the sign convention, see documentation for details reverse $\mathrm{switch}$ $\left\{\begin{array}{cc}-1& \mathrm{reverse}=\mathrm{true}\\ 1& \mathrm{otherwise}\end{array}\right\$ -1 if reverse, else 1 switch $R$ $0.1$ $m$ Poppet radius R $r$ $0.05$ $m$ Throat radius r ${\mathrm{Rrod}}_{1}$ $m$ Rod radius, poppet side Rrod_1 ${\mathrm{Rrod}}_{2}$ $m$ Rod radius, seat side Rrod_2 ${\mathrm{lift}}_{0}$ $0$ $m$ Poppet lift in neutral position lift_0 $\mathrm{V01}$ [1] ${m}^{3}$ Volume, poppet side, when closed valve V01 $\mathrm{V02}$ [1] ${m}^{3}$ Volume, seat side, when closed valve V02 $\mathrm{TransitionType}$ $1$ Type of transition TransitionType ${k}_{1}$ $10$ Laminar part of flow model k1 ${k}_{2}$ $2.04$ Turbulent part of flow model k2 $\mathrm{Cdmax}$ $0.7$ Discharge coefficient Cdmax ${\mathrm{\lambda }}_{c}$ $14$ Critical flow number lambdac ${\mathrm{ΔT}}_{\mathrm{system}}$ $0$ $K$ Temperature offset from system temperature dT_system

[1] $2.0\mathrm{\pi }L{R}^{2}$

Constant Parameters

 Name Default Units Description Modelica ID $\mathrm{Xmin}$ $\sqrt{{R}^{2}-{r}^{2}}$ minimum distance between ball center and seat Xmin $\mathrm{flowareamax}$ [1] ${m}^{2}$ Maximum flow area flowareamax ${\mathrm{Arod}}_{1}$ [2] ${m}^{2}$ Rod area, poppet side Arod_1 ${\mathrm{Arod}}_{2}$ [3] ${m}^{2}$ Rod area, seat side Arod_2 ${X}_{0}$ $\mathrm{lift}$0+Xmin_ $m$ distance from seat to poppet center X_0

[1] $\mathrm{\pi }{r}^{2}-\mathrm{Arod_2}$

[2] $\mathrm{\pi }{\mathrm{Rrod_1}}^{2}$

[3] $\mathrm{\pi }{\mathrm{Rrod_2}}^{2}$