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Propagation of localized, unsteady heat loads in aircraft cabin air flows

Bosbach, Johannes and Dehne, Tobias (2016) Propagation of localized, unsteady heat loads in aircraft cabin air flows. CEAS Aeronautical Journal, 7 (1), pp. 57-68. Springer. DOI: 10.1007/s13272-015-0175-y ISSN 1869-5590

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Official URL: http://link.springer.com/article/10.1007/s13272-015-0175-y

Abstract

We studied experimentally the propagation of heat, released from a local source, in aircraft cabin air flow using two different ventilation systems. Besides the state-of-the-art mixing ventilation system, a ceiling based cabin displacement ventilation system was employed. As test environment we used the Do 728 test facility of the German Aerospace Center in Göttingen. To measure the response of the cabin temperatures to the released heat, we evaluated the cross-correlation function between the local temperatures and the normalized surface temperature of the heat source. The latter was heated periodically at three different nominal heating powers, ranging from 100°W through 400°W. By analyzing the data, we could observe the gradual change of the temperature from a passive to an active scalar. While the two ventilation systems reveal a similar behavior at the lower source powers, the distinguished air guiding principles of the momentum-driven mixing ventilation and the buoyancy-driven ceiling based cabin displacement ventilation imply different propagation paths at higher power settings of the heat source. For the first time, the spatial spreading of locally released heat in mixing ventilation and ceiling based displacement ventilation was determined in an aircraft cabin.

Item URL in elib:https://elib.dlr.de/98250/
Document Type:Article
Additional Information:Published online: 03. November 2015
Title:Propagation of localized, unsteady heat loads in aircraft cabin air flows
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Bosbach, Johannesjohannes.bosbach (at) dlr.deUNSPECIFIED
Dehne, Tobiastobias.dehne (at) dlr.deUNSPECIFIED
Date:2016
Journal or Publication Title:CEAS Aeronautical Journal
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:7
DOI :10.1007/s13272-015-0175-y
Page Range:pp. 57-68
Publisher:Springer
ISSN:1869-5590
Status:Published
Keywords:indoor air flow, mixing ventilation, displacement ventilation, mixed convection, heat propagation, active scalar
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems and Cabin
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Fluid Systems
Deposited By: Micknaus, Ilka
Deposited On:23 Nov 2015 15:17
Last Modified:08 Mar 2018 19:01

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