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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。
Using the hot-wire speed measurement technique, the jet flow field of the MD-82 aircraft in the real cabin environment was measured precisely. The real measured flow field was analyzed by wavelet multi-scale turbulence and the turbulent jet flow field was reconstructed The distribution of velocity field in different directions, the energy distribution law and energy transfer law of different scale turbulent structures are analyzed. The results show that the energy distribution of turbulence at different scales is related to the development and evolution of jet flow field. Large-scale low-frequency and low-kinetic energy turbulence generated by far-field inverse cascade has an important effect on heat transfer and pollutant transport and diffusion in the cabin ; From the perspective of the influence of the frequency of airflow fluctuations on the comfort, the airflow in the flow field at the slit of the passenger compartment does not make people feel uncomfortable. However, from the viewpoint of the periodicity and uniformity of the speed distribution along the grid, To be further improved.