Abstract

It is necessary to reduce the internal noise of a car for passengers comfort, because the internal noise becomes larger according to the increase of an elevator running speed. The aerodynamic noise that is one of the sound sources becomes dominant for the ultra-high-speed elevator. In this study, two types of the streamlined fairing are examined in order to reduce aerodynamic noise by computational fluid dynamics (CFD) and wind tunnel test. It is found that the streamlined fairing which has a curved surface toward the door (front) side of the car is effective to reduce the surface pressure fluctuations. The developed fairing reduces 7.2dB aerodynamic noise compared with the conventional elevator car in the wind tunnel test. As a result of the CFD and the wind tunnel test, we get a prospect of reducing 10dB in the car by the developed fairing.

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