A realistic mock-up of a single-aisle cabin has been built at the Hermann-Rietschel-Institute. Supply systems and heating and cooling devices are integrated on the inner surface to simulate outdoor conditions for flight and ground cases. The air flow velocities are measured with different techniques like the Particle Streak Tracking (PST) and thermal anemometry. Temperatures are recorded by thermography and thermocouples. The experiments will deliver a database for testing and verifying simulation tools. The data shows a first overview of the airflow situation in a typical aircraft cabin. The air is supplied with a high momentum and temperature difference to the cabin. This causes a turbulent mixing of supply jets and cabin air. It leads to an almost constant vertical temperature and contaminant distribution. Visualisations as well as time histories from the local values show that attention has to be paid on large scale transient flow structures. These transient flow structures lead to local flow velocity changes that might decrease the thermal comfort. Long term observation shows changes in the flow structure. The central jet direction will temporary change leading to higher flow velocities at the left hand side. The thermal loads in aircraft cabins add up to high cooling capacities of up to approximately 250 W/m2. For these high levels of thermal load thermal comfort can only be provided by implementing a well balanced air conditioning system.
Experimental study of different air distribution systems for aircraft cabins
Experimentelle Untersuchung verschiedener Luftverteilungssysteme für Flugzeugkabinen
2008
8 Seiten, 11 Bilder, 1 Tabelle, 3 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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