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http://dx.doi.org/10.7467/KSAE.2012.20.5.044

Design Optimization of Intake Muffler for Fuel Cell Electric Vehicle APU  

Kim, Eui-Youl (Department of Mechanical Engineering, Inha University)
Lee, Young-Joon (Department of Mechanical Engineering, Inha University)
Lee, Sang-Kwon (Department of Mechanical Engineering, Inha University)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.20, no.5, 2012 , pp. 44-52 More about this Journal
Abstract
Fuel cell electric vehicles have some noise problems due to its air processing unit which is required to feed the ambient air into the fuel cell stack. Discrete-frequency noises are radiated from a centrifugal blower due to rotor-stator interaction. Their fundamental frequency is the blade passing frequency, which is determined by the number of rotor blades and their rotating speed. To reduce such noises, multi-chamber perforated muffler has been designed. In this paper, in order to improve the transmission loss of a perforated muffler, the relationship between the impedance model of a perforated hole and its noise reduction performance is studied, and the applicability of a short-length perforated muffler to air processing unit of fuel cell system is described using acoustic simulation results and experimental data. The acoustic velocity vector across the neck of a perforated hole is very important design factor to optimize the transmission of an intake muffler. The suggested short-length perforated muffler is effective on discrete-frequency noises while keeping the volume of intake muffler minimized.
Keywords
Discrete-frequency noise; Fuel cell electric vehicle; Transmission loss; Centrifugal blower; Perforated muffler;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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