Experimental investigation on draft sensation in aircraft cabin based on multi-scale characteristics of slot-jet flow field

Finely measures the slot-jet flow fields in the MD-82 airliner cabin environment by hot-wire anemometry system. Analyses the actual velocity fields based on the wavelet-transform multi-scales eddy analysis. Obtains the velocity fields in different directions in the turbulence jet flow field. Analyses the energy distribution and transmission law of different scale eddies. The results show that the energy distribution of different scale eddies is connected with the evolution of the slot-jet flow field, and the large scale eddies with low-frequency and low-kinetic energy generated by the effect of inverse energy cascade in the far flow field have significant impact on the thermal transmission and the diffusion of contaminant. The air flow of the slot-jet flow field in this airliner cabin dose not influence human’s comfort in the way of flow vibration frequency, but considering periodicity and uniformity of the flow velocity distribution along slot, the flow field needs be improved.