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http://dx.doi.org/10.6108/KSPE.2017.21.6.103

Brief Note on Acoustic Impedance Characteristics at Flow Boundaries  

Seo, Seonghyeon (Department of Mechanical Engineering, Hanbat National University)
Publication Information
Journal of the Korean Society of Propulsion Engineers / v.21, no.6, 2017 , pp. 103-109 More about this Journal
Abstract
An increase in acoustic energy in a combustion chamber coupled with heat fluctuations from flame results in the occurrence of combustion instability. The assessment of combustion stability requires the prediction of acoustic energy variation by understanding the acoustical characteristics of flow boundaries in a combustion chamber. The present paper discusses about the characteristics of acoustic impedances at boundaries in terms of Strouhal number and summarizes theoretical analyses on the acoustic characteristics of injector-head-like configurations. Also, the details of the two-microphone measurement technique have been presented.
Keywords
Combustion Instability; Acoustic Impedance; Absorption Coefficient; Two Microphone Measurement;
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Times Cited By KSCI : 2  (Citation Analysis)
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