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Simulation of Helmholtz Resonance Effects in Aircraft ECS

Pollok, Alexander and Schröffer, Andreas (2017) Simulation of Helmholtz Resonance Effects in Aircraft ECS. In: 6th International Workshop on Aircraft System Technologies. 6th International Workshop on Aircraft System Technologies, 21.-22. Feb. 2017, Hamburg, Deutschland.

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Abstract

Helmholtz resonators are closed volumes that are connected to pipes. They exhibit a pronounced resonance frequency, where small boundary pressure excitations in the volume or the environment lead to large mass flow excitations in the pipe. Aircraft have a topology similar to Helmholtz resonators, the closed volume is represented by the cabin, while the pipe is represented by the Environmental Control System. Some discrepancies appear due to the non-zero mass-flow or friction effects in aircraft ECS. Preliminary analyses showed, that resonance effects might still appear in spite of this differences. A detailed aircraft-level model of an ECS is presented in the equation-based modelling language Modelica. In simulations of this model, the appearance of Helmholtz resonance effects in aircrafts could not be confirmed.

Item URL in elib:https://elib.dlr.de/111334/
Document Type:Conference or Workshop Item (Speech)
Title:Simulation of Helmholtz Resonance Effects in Aircraft ECS
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Pollok, Alexanderalexander.pollok (at) dlr.deUNSPECIFIED
Schröffer, AndreastumUNSPECIFIED
Date:February 2017
Journal or Publication Title:6th International Workshop on Aircraft System Technologies
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Modeling, Simulation, Modelica
Event Title:6th International Workshop on Aircraft System Technologies
Event Location:Hamburg, Deutschland
Event Type:international Conference
Event Dates:21.-22. Feb. 2017
Organizer:TUHH
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of System Dynamics and Control > Aircraft System Dynamics
Deposited By: Pollok, Dipl.-Ing. Alexander
Deposited On:16 Aug 2017 17:09
Last Modified:31 Jul 2019 20:08

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