modelPartialFriction

Base class for friction pressure loss correlations

Information

Any derived friction pressure loss correlation must define a relation between m_flow and dp, e.g. dp/dz = ... * m_flow^2/(rho)

The additive friction coefficient geo.zeta_add should contribute to the pressure loss something similar to dp/dz = zeta_add/L*rho/2*v^2

Author: Haiko Steuer SCD
Checked by:
Protection class: public

License, Copyright and Disclaimer


Licensed by Siemens AG under the Siemens Modelica License 2

Copyright 2007-2012 Siemens AG. All rights reserved.

This Modelica package is free software and the use is completely at your own risk; it can be redistributed and/or modified under the terms of the Siemens Modelica License 2. For license conditions (including the disclaimer of warranty) see Siemens Modelica License 2 .

Parameters

TypeNameDefaultDescription
Reallambda0.02constant friction factor (used for valve friction model only)
Advanced
SiemensPower.Utilities.Structures.PipeGeogeoPipegeometry parameters of the tube
Modelica.SIunits.Lengthdzlength of tube section for which friction pressure loss is wanted

Components

TypeNameDefaultDescription
Modelica.SIunits.Pressureppressure
Modelica.SIunits.SpecificEnthalpyhspecific enthalpy
Modelica.SIunits.Densityrhomass density
Modelica.SIunits.DynamicViscosityetadynamic viscosoty
RealsteamQualitySteam quality
RealxdoCritical steam quality, at which the boiling crisis (e.g. dryout) occurs
Modelica.SIunits.MassFlowRatem_flowmass flow rate
Modelica.SIunits.Pressuredp