Turbulent-Induced Noise around a Circular Cylinder Using Permeable FW-H Method

Woen-Sug Choi^1*, Suk-Yoon Hong¹, Jee-Hun Song², Hyun-Wung Kwon³, Chul-Min Jung⁴, Tae-Gyoung Kim¹

¹Departmentof Naval Architecture and Ocean Engineering, Seoul National University, Seoul, Republic of Korea.
²Department of Naval Architecture and Ocean Engineering, Chonnam National University, Yeosu, Republic of Korea.
³Department of Naval Architecture and Ocean Engineering, Koje College, Koje, Republic of Korea.
⁴Advanced Naval Technology Center, NSRDI, Agency for Defense Development, Chinhae, Republic of Korea.

DOI: 10.4236/jamp.2015.32025                

Abstract

Varieties of research on turbulent-induced noise are conducted with combinations of acoustic analogy methods and computational fluid dynamic methods to analyse efficiently and accurately. Application of FW-H acoustic analogy without turbulent noise is the most popular method due to its calculation cost. In this paper, turbulent-induced noise is predicted using RANS turbulence model and permeable FW-H method. For simplicity, noise from 2D cylinder is examined using three different methods: direct method of RANS, FW-H method without turbulent noise and permeable FW-H method which can take into account of turbulent-induced noise. Turbulent noise was well predicted using permeable FW-H method with same computational cost of original FW-H method. Also, ability of permeable FW-H method to predict highly accurate turbulent-induced noise by applying adequate permeable surface is presented. The procedure to predict turbulent- induced noise using permeable FW-H is established and its usability is shown.

Keywords

Turbulent-Induced Noise, Circular Cylinder, Acoustic Analogy, FW-H Method, Permeable FW-H Method

Conflicts of Interest

The authors declare no conflicts of interest.

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