破坏了Modelica.Fluid.Valves.ValveIncompressible模型？接收错误"Function Utilities.regRoot2 not found in scope <X>“

Question

我基于两个双向阀创建了一个三通阀模型，这两个阀被声明为可替换模型。这就是它的初级阶段。

within SHCLibrary;
model ThreeWayBallValveII

// Import section, AKA nicknames section. To (greately) improve readability.
  import Modelica.Fluid.System;
  import Modelica.Fluid.Interfaces.{FluidPort_a, FluidPort_b};
  import Modelica.Blocks.Sources.Constant;
  import Modelica.Blocks.Math.Add;
  import Modelica.Blocks.Interfaces.RealInput;

// Definition of the fluid to be used in the component.
//  replaceable package Medium = Modelica.Media.Interfaces.PartialMedium;
  replaceable package Medium = Modelica.Media.Water.ConstantPropertyLiquidWater;
// Allows for optional redefinition of junciton and valves model. 
//  replaceable model TeeJunction = Modelica.Fluid.Fittings.BaseClasses.PartialTeeJunction;
  replaceable model TeeJunction = Modelica.Fluid.Fittings.TeeJunctionIdeal;
//  replaceable model Valve = Modelica.Fluid.Valves.BaseClasses.PartialValve;
  replaceable model Valve = Modelica.Fluid.Valves.ValveLinear;
//  replaceable model Valve = Modelica.Fluid.Valves.ValveIncompressible;
//  import Valve = Modelica.Fluid.Valves.ValveIncompressible;

...

我在修改Valve声明的测试模型中使用了这个阀门。关键是，如果我使用LinearValve模型，一切都会很顺利。

  ThreeWayBallValveII V1(
   redeclare package Medium = Medium,
   redeclare model Valve = Modelica.Fluid.Valves.ValveLinear)
   annotation(
    Placement(visible = true, transformation(origin = {0, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));

相反，如果我使用ValveIncompressible模型

  ThreeWayBallValveII V1(
   redeclare package Medium = Medium,
//   redeclare model Valve = Modelica.Fluid.Valves.ValveLinear)
   redeclare model Valve = Modelica.Fluid.Valves.ValveIncompressible)
   annotation(
    Placement(visible = true, transformation(origin = {0, 0}, extent = {{-10, -10}, {10, 10}}, rotation = 0)));

我得到了这个错误：

[1] 12:40:08 Translation Error
[Modelica.Fluid.Valves: 38:9-40:80]: Function Utilities.regRoot2 not found in scope Valve.

我想这可以通过添加下面这样的一行来解决

      import Modelica.Fluid.Utilities;

添加到Valves包中的ValveIncompressible模型，但对我来说这似乎很奇怪，因为之前还没有修复这个问题，我想知道我做错了什么。你认为如何？

由衷地，

Answer 1

文件Modelica 3.2.3/Fluid/Valves.mo中似乎需要import Modelica.Fluid.Utilities;。在我的机器上，有问题的类的开头现在是：

within Modelica.Fluid;
package Valves "Components for the regulation and control of fluid flow"
    extends Modelica.Icons.VariantsPackage;

    model ValveIncompressible "Valve for (almost) incompressible fluids"
      extends BaseClasses.PartialValve;
      import Modelica.Fluid.Types.CvTypes;
      import Modelica.Constants.pi;
      import Modelica.Fluid.Utilities;

      constant SI.ReynoldsNumber Re_turbulent = 4000
      "cf. straight pipe for fully open valve -- dp_turbulent increases for closing valve";
      parameter Boolean use_Re = system.use_eps_Re
      "= true, if turbulent region is defined by Re, otherwise by m_flow_small"
        annotation(Dialog(tab="Advanced"), Evaluate=true);
...

通过这个修改，我的模型就可以工作了。