Abstract
The paper deals with instigation of influence of air duct geometry on air jet direction in aircraft cabin ventilated by mixing ventilation. CFD approach was used for investigation and model geometry was based on small aircraft cabin mock-up geometry. Model was also equipped by nine seats and five manikins that represent passengers. The air jet direction was observed for selected ambient environment parameters and several types of air duct geometry and influence of main air duct geometry on jets direction is discussed. The model was created in StarCCM+ ver. 6.04.014 software and polyhedral mesh was used.
Highlights
The paper deals with instigation of influence of air duct geometry on air jet direction in aircraft cabin ventilated by mixing ventilation
CFD approach was used for investigation and model geometry was based on small aircraft cabin mock-up geometry
The air jet direction was observed for selected ambient environment parameters and several types of air duct geometry and influence of main air duct geometry on jets direction is discussed
Summary
The main factors which create an internal environment in cabins ventilated by mixing ventilation are parameters and the locations of air distribution outlets [1]. Used method is modelling by using an equivalent area of distribution outlet with combination of air velocity of supplied air (see figure 1) This method is a fundamental and is implemented in all available commercial CFD codes. Real free/open area is in many cases difficult to determine and the method does not take into account the possible influence of distribution air duct This procedure can lead to inaccuracies in the calculation of the jet entrainment and penetration length of the jet [1]. Due to the rapidly growing performance of computers in last years it is possible to use full geometry representation method This method includes outlet and air duct geometry into the model geometry (see figure 2). EPJ Web of Conferences jets in the cabin Another important part of investigation was influence of air duct on parameters of flow field and primary jets parameters. The air duct feeds nine distribution outlets, one for each seat (see figure 5)
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