Extends from Modelica.Icons.RecordsPackage (Icon for package containing records).
Name | Description |
---|---|
Bend | Input for bend |
Geometry | Input for several geometries of internal flow |
Orifice | Input for orifice |
PressureLossInput | Input for pressure loss calculation |
StraightPipe | Input for straight pipe |
Tjunction | Input for T-junction |
Diffuser | Input for diffuser |
EdgedBend | Input for bend |
SuddenChange | Input for sudden change of diameter |
Input for bend
Extends from EdgedBend (Input for bend).
Name | Description |
---|---|
Bend | |
d_hyd | Hydraulic diameter [m] |
delta | Angle of turning [rad] |
K | Roughness (absolute average height of surface asperities) [m] |
R_0 | Curvature radius [m] |
Input for several geometries of internal flow
Extends from Modelica.Icons.Record (Icon for records).
Name | Description |
---|---|
Channel | |
geometry | Choice of geometry for internal flow |
K | Roughness (average height of surface asperities) [m] |
L | Length [m] |
Annular cross sectional area | |
d_ann | Small diameter [m] |
D_ann | Large diameter [m] |
Circular cross sectional area | |
d_cir | Internal diameter [m] |
Elliptical cross sectional area | |
a_ell | Half length of long base line [m] |
b_ell | Half length of short base line [m] |
Rectangular cross sectional area | |
a_rec | Horizontal length [m] |
b_rec | Vertical length [m] |
a_tri | Length of base line [m] |
Triangle cross sectional area | |
h_tri | Height to top angle perpendicular to base line [m] |
beta | Top angle [rad] |
Input for orifice
Extends from Modelica.Icons.Record (Icon for records).
Name | Description |
---|---|
Orifice | |
A_0 | Cross sectional area of vena contraction [m2] |
C_0 | Perimeter of vena contraction [m] |
A_1 | Large cross sectional area of orifice [m2] |
C_1 | Large perimeter of orifice [m] |
L | Length of vena contraction [m] |
Input for pressure loss calculation
Extends from Modelica.Icons.Record (Icon for records).
Name | Description |
---|---|
Input | |
target | Target variable of calculation |
dp | Pressure loss [Pa] |
m_flow | Mass flow rate [kg/s] |
Input for straight pipe
Extends from Modelica.Icons.Record (Icon for records).
Name | Description |
---|---|
Straight pipe | |
d_hyd | Hydraulic diameter [m] |
L | Length [m] |
Input for T-junction
Extends from Modelica.Icons.Record (Icon for records).
Name | Description |
---|---|
T-junction | |
united_converging_cross_section | = true, if A_cross_total = 2*A_cross_branch, otherwise A_cross_total > 2*A_cross_branch |
velocity_reference_branches | = true, if pressure loss coefficients w.r.t. velocity in each passage, otherwise w.r.t. velocity in total passage |
alpha | Angle of branching |
d_hyd[3] | Hydraulic diameter of passages [side,straight,total] [m] |
Restrictions | |
m_flow_min | Restriction for smoothing at reverse fluid flow [kg/s] |
v_max | Restriction for maximum fluid flow velocity [m/s] |
zeta_TOT_max | Restriction for maximum value of pressure loss coefficient |
Input for diffuser
Extends from Modelica.Icons.Record (Icon for records).
Name | Description |
---|---|
Diffuser | |
alpha | Diffuser diverging angle [rad] |
A_1 | Small constant cross sectional area before diffuser section [m2] |
A_2 | Large constant cross sectional area after diffuser section [m2] |
C_1 | Small perimeter before diffuser section [m] |
C_2 | Large perimeter after diffuser section [m] |
L_1 | Length of straight pipe before diffuser section [m] |
L_2 | Length of straight pipe after diffuser section [m] |
L_d | Length of diffuser section (parallel to bulk fluid flow) [m] |
Numerical aspects | |
dp_small | Linearisation for a pressure loss smaller then dp_small [Pa] |
zeta_TOT_min | Minimal pressure loss coefficient for infinite Reynolds number |
zeta_TOT_max | Maximum pressure loss coefficient for Reynolds number approaching zero |
Input for bend
Extends from Modelica.Icons.Record (Icon for records).
Name | Description |
---|---|
Bend | |
d_hyd | Hydraulic diameter [m] |
delta | Angle of turning [rad] |
K | Roughness (absolute average height of surface asperities) [m] |
Input for sudden change of diameter
Extends from Modelica.Icons.Record (Icon for records).
Name | Description |
---|---|
Orifice | |
A_1 | Small cross sectional area of orifice [m2] |
A_2 | Large cross sectional area of orifice [m2] |
C_1 | Small perimeter of orifice [m] |
C_2 | Large perimeter of orifice [m] |