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Title: Sound propagation and wind flow around blockages and their correlation
Other Titles: Sheng yin de chuan bo yu feng de liu dong wei rao zu ai wu ji qi xiang guan xing yan jiu
Authors: Lau, Chau Ming (劉秋明)
Department: Department of Building and Construction
Degree: Master of Philosophy
Issue Date: 2010
Publisher: City University of Hong Kong
Subjects: Noise control.
Buildings -- Environmental engineering.
Sound -- Transmission.
Air flow.
Notes: CityU Call Number: TH1725 .L33 2010
ix, 101 leaves : ill. (some col.) 30 cm.
Thesis (M.Phil.)--City University of Hong Kong, 2010.
Includes bibliographical references (leaves 95-101)
Type: thesis
Abstract: This study focuses on the behaviors of and the correlation between sound propagation and airflow around blockages and inside group of buildings. The ODEON and CFX software packages are used to simulate sound propagations and airflows in two types of models: a single vertical barrier model and a model of a group of buildings. To verify the airflow model, the simulation results are compared with experimental data obtained from a wind tunnel. In general, the experimental results show a reasonable level of agreement with the simulation results. The effects of different parameters on sound and flow reductions in the simulation models are also studied. Correlations between sound reduction and airflow reduction in different conditions are obtained and investigated. The main contribution of this study is to provide evidence on the correlation between sound reduction and airflow propagation. The results could potentially be used in converting sound reduction data - the onsite measurement of which is more reliable and straightforward - to airflow reduction data - the onsite measurement of which is subject to fluctuations due to uneven prevailing and local winds.
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