Fast prediction of noise level and air flow in rail vehicle HVAC ducts using a Modelica framework

Helmut Kühnelt (Speaker), Thomas Bäuml, Anton Haumer, Gerhard Karlowatz

Research output: Chapter in Book or Conference ProceedingsConference Proceedings with Oral Presentation

Abstract

Design limits often let the manufacturer of HVAC systems for rail vehicles face the challenge in meeting the strict noise level limit as well as insuring the required air flow. We introduce a framework for fast joint calculation of acoustic and flow quantities in HVAC duct networks which is designed for concept modelling in an early construction stage. The acoustic domain is described by the band averaged sound power approach proposed in the VDI and ASHRAE guidelines, the fluid mechanic domain by pressure loss models. Flow-acoustic interaction is taken into account. Based on the object-oriented, equation based multi-domain modelling language Modelica the framework can be integrated into already existing Modelica libraries for various physical domains and is easily extendable. User-friendly simulation-setup in a GUI and external parameterization ensures persistent data management and a smooth workflow.
Original languageEnglish
Title of host publicationProceedings of Internoise 2010, 39th Internaional Congress on Noise Control Engineering
Pages1-11
Number of pages11
Publication statusPublished - 2010
EventInternoise 2010, 39th International Congress on Noise Control Engineering - Noise and Sustainability -
Duration: 13 Jun 201016 Jun 2010

Conference

ConferenceInternoise 2010, 39th International Congress on Noise Control Engineering - Noise and Sustainability
Period13/06/1016/06/10

Research Field

  • Not defined

Keywords

  • HVAC noise prediction
  • two port theory
  • Modelica.

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