Thick Edge $—$ Basic model for thick edge geometry

The Thick Edge component calculates the pressure loss for flow through a thick-edge orifice (vena contraction).

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

Parameters

General Parameters

 Name Default Units Description Modelica ID ${\mathrm{ΔT}}_{\mathrm{system}}$ $0$ $K$ Temperature offset from system temperature dT_system

Hydraulic Resistance Parameters

 Name Default Units Description Modelica ID ${A}_{0}$ $\frac{1}{10}{A}_{1}$ ${m}^{2}$ Cross sectional area of vena contraction A_0 ${C}_{0}$ $\frac{1}{10}{C}_{1}$ $m$ Perimeter of vena contraction C_0 ${A}_{1}$ [1] ${m}^{2}$ Large cross sectional area of orifice A_1 ${C}_{1}$ [2] $m$ Large perimeter of orifice C_1 $L$ $0.001$ $m$ Length of vena contracta L ${\mathrm{Δp}}_{\mathrm{smooth}}$ $1$ $\mathrm{Pa}$ Start linearisation for decreasing pressure loss dp_smooth

[1] $\frac{1}{40000}\mathrm{\pi }$

[2] $\frac{1}{100}\mathrm{\pi }$