高速エレベータの空力騒音に関する研究 : かご周りの流れに及ぼすエプロン部の影響

概要

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In order to gather information regarding the method of reducing aerodynamic noise of a high-speed elevator, the flow structure around an elevator car was studied by means of flow visualization experiments and numerical simulation using simplified models. From the study, it was made clear that flow behavior in front of the car door during downward motion was qualitatively different from that during upward motion, and that the difference was caused by the apron. During downward car motion, streamwise vortices are generated around the apron side edyes, following a mechanism similar to the generation of the tip vortex. As a result, the flow in front of the car door is converged and accelerated, and this mechanism causes the elevation of noise inside the car. On the other hand at the side walls and the back wall, large-scale separation occur and make the flow field very complex.
1993-08-25