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Modeling of a Boiler Pipe with Two-Phase Flow Instabilities

Publiceringsår: 2000
Språk: Engelska
Sidor: 79-88
Publikation/Tidskrift/Serie: Modelica Workshop 2000 Proceedings
Dokumenttyp: Konferensbidrag


Tubes with boiling are common elements of many processes.

They appear in steam generators and refrigerators and many other systems.

The behavior of such systems is complicated and many physical phenomena

are involved. It has for example been observed that different types of

instabilities can occur. In this paper we will discuss modeling of tubes with

boiling. As an application we will discuss an instability phenomenon due to

pressure oscillations that has been observed experimentally in many different

situations. We will first derive a simple analytical model which is able to

capture the oscillations qualitatively. The simple model also gives insight into

the mechanisms that generate the oscillations. A more complicated model

is then built using a recently developed model base library in Modelica. A

comparison between the simple and the complicated model is also given


  • Control Engineering



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