Rong Xue , Cheuk Ming Mak , Chenzhi Cai , Kuen Wai Ma
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引用次数: 0
Abstract
This paper presents experimental investigations into the acoustic behavior of the Helmholtz resonator model in the presence of grazing flow. The four-microphone method is performed to measure the transmission loss performance of the resonator model under flow speeds of 0–20 m/s, and the particle image velocimetry (PIV) measurement is adopted to evaluate the fluid characteristics of the resonator neck. The flow effect on the acoustic performance of the resonator model is derived by using the curve fit technique. An empirical model is established to predict the transmission loss of the Helmholtz resonator in the presence of the grazing flow. The empirical model is added to the transfer matrix method to predict the transmission loss of the period Helmholtz resonator model under different grazing flow speeds. The PIV experiment results reveal the fluid dynamics in the neck region of the resonator model. Based on the acoustic and PIV experimental analysis, this work can provide a prediction of the acoustic performance of the periodic Helmholtz resonator array in the presence of grazing flow.
期刊介绍:
Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense.
Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems.
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