This paper presents the results of the modeling of a complex cooling system of a future commercial aircraft. The results from transient calculations will be presented, for instance the system behavior during the climb phase of the aircraft. Hereby the feasibility of a first control strategy will be investigated. Moreover the experience solving this modeling task coupling two different simulation environments will be discussed. The simulation of the investigated cooling system shows: The time interval at which data between coupled tools is exchanged has a huge effect on the result. Extrapolation of the exchanged data can be performed in order to decrease the computation time without affecting the result. Interpolation of the exchanged data improves the numerical behaviour but deteriorates the result. To control the high pressure of the vapour cycles the air mass flow rate is used as the controlling variable. A too small air mass flow leads to an increase of the hot loop coolant temperatures. Different control strategies such as a head pressure control valve have to be investigated.
Numerical simulation of a new cooling system for commercial aircrafts
2008
1 Seite, 14 Bilder, 5 Quellen
Conference paper
English
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