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http://dx.doi.org/10.5762/KAIS.2013.14.1.51

Experimental Study on Noise Reduction of Fan for Automotive Air Conditioner  

Lee, Jin-Kab (Division of Mechanical Automation, Gyeonggi College of Science and Technology)
Chung, Byung-Hoon (KCMS LTD. Research Lab.)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.14, no.1, 2013 , pp. 51-56 More about this Journal
Abstract
This paper is the experimental study to investigate the noise sources location in order to reduce the noise level of line flow fan for the air conditioner in the subway car. The noise of line flow fan is caused by various factors such as the turbulence by air flow, random noise, noise of blade passing frequence(681Hz) and noise due to structural vibration of rotor unbalance(28.4Hz) by motor revolution. By performing the noise reduction on each sound source, the noise level is decreased as much as 5.7dB(A) through the controls of housing guide angle and distance, the configuration changes of flow passage shape and rotor balancing.
Keywords
Balancing; Blade passing frequency; Line flow fan; Noise; Vibration;
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