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 $\left[m\right]$.

Connections

 Name Description Modelica ID ${\mathrm{port}}_{A}$ Layout of port where oil flows into an element ($0<{m}_{\mathrm{flow}}$, ${p}_{B}<{p}_{A}$ means $0<\mathrm{Δp}$) port_A ${\mathrm{port}}_{B}$ Hydraulic port where oil leaves the component (${m}_{\mathrm{flow}}<0$, ${p}_{B}<{p}_{A}$ means $0<\mathrm{Δp}$) port_B $\mathrm{oil}$ oil ${A}_{\mathrm{commanded}}$ Commanded Area commandedArea

Parameters

General Parameters

 Name Default Units Description Modelica ID ${\mathrm{ΔT}}_{\mathrm{system}}$ $0$ $K$ Temperature offset from system temperature dT_system $\mathrm{Transition}$ $1$ Transition model Transition ${k}_{1}$ $10$ Laminar part k1 ${k}_{2}$ $2$ ${k}_{2}=\frac{1}{{C}_{d}^{2}}$ k2 ${C}_{d}$ $\frac{1}{\sqrt{{k}_{2}}}$ Max discharge coefficient C_d ${\mathrm{\lambda }}_{c}$ $\frac{2{k}_{1}}{\sqrt{{k}_{2}}}$ Critical flow number lambdac

Constant Parameters

 Name Default Units Description Modelica ID $\mathrm{orif}$ $2$ Orifice dimension orif $\mathrm{flowcond}$ $1$ Flow condition flowcond reg type $0$ Regularization type regtype reg param $0$ Regularization parameter regparam $\mathrm{cavitation}$ $\mathrm{false}$ Cavitation cavitation $\mathrm{checkvalve}$ $\mathrm{false}$ checkvalve $\ell$ $0$ $m$ Orifice length; $1<\frac{\ell }{d}$ length ${\Re }_{\mathrm{trans}}$ $0$ Transition Reynolds number Re_trans ${p}_{\mathrm{trans}}$ $0$ $\mathrm{Pa}$ Transition pressure p_trans ${p}_{\mathrm{closed}}$ $0$ $\mathrm{Pa}$ Cracking pressure p_closed ${G}_{\mathrm{leak}}$ $0$ $\frac{{m}^{3}}{s\mathrm{Pa}}$ Leakage conductance G_Leak

Constants

 Name Value Units Description Modelica ID $\mathrm{α\left[k\right]}$ $0.649$ alpha_k