Study of Isothermal Air Jets from a Linear Slot Diffuser in an Aircraft Cabin Mockup with 2D-PIV

摘要

Knowledge of the air jet behaviors within cabin is essential to evaluate and improve the cabin environment quality.In this investigation,we performed a detailed and large-scale 2D particle image velocimetry (PIV) measurement to characterize the isothermal jet flows issuing from a linear slot diffuser in a ventilated aircraft cabin mockup.The measurements were carried out at different inlet Reynolds numbers (Re) ranging from 1480 to 6940,based on the inlet velocities and the slot height.The PIV measured results clearly presented the jet structures in the entrainment process downstream from the slot.The free jets issuing from the inlet quickly developed into wall jets due to the Coanda effect.The jet profiles also indicated that the cabin air jets behaved similar to plane wall jets after attaching to the luggage compartment.The jet flows featured independent of the Re when Re ≥ 5270.