基于条缝形出风口流场多尺度分析的飞机客舱吹风感实验研究
Experimental investigation on draft sensation in aircraft cabin based on multi-scale characteristics of slot-jet flow field
摘要：
利用热线测速技术，精细测量了MD-82飞机真实客舱环境中条缝形出风口的射流流场，对实际测得的流场进行了子波多尺度湍涡分析，重构出湍射流流场中不同方向上的速度场分布，分析了不同尺度湍涡结构的能量分布规律及其能量传递规律。结果显示，不同尺度湍涡的能量分布规律与射流流场的发展演化有关，远场逆级串生成的低频低动能大尺度湍涡对机舱内热量的传递和污染物的输运扩散产生重要影响；从气流波动频率对舒适性影响的角度分析，该客舱条缝形出风口流场的气流不会使人有不舒适的感觉,但是从速度沿格栅分布的周期性及均匀性考虑，仍有待进一步的改进。
Abstract：
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.
Keywords:airliner cabin, slot outlet, hot-wire anemometry, flow field, draft sensation, multi-scale analysis, wavelet, eddy