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수중익형 주변 유동장에서의 공동현상과 유동소음에 대한 수치적 연구Numerical Investigation of Cavitation Flow Around Hydrofoil and Its Flow Noise

Other Titles
Numerical Investigation of Cavitation Flow Around Hydrofoil and Its Flow Noise
Authors
김상현박원규설한신정철웅
Issue Date
2016
Publisher
한국소음진동공학회
Keywords
공동현상; 균질 혼합 모델; 수중익형; 수중소음; Cavitation; Homogeneous Mixture Model; Hydrofoil; Hydro-acoustics
Citation
한국소음진동공학회논문집, v.26, no.2, pp 141 - 147
Pages
7
Journal Title
한국소음진동공학회논문집
Volume
26
Number
2
Start Page
141
End Page
147
URI
https://www.kriso.re.kr/sciwatch/handle/2021.sw.kriso/690
DOI
10.5050/KSNVE.2016.26.2.141
ISSN
1598-2785
2287-5476
Abstract
Underwater cavitation is one of the most important issues because it causes not only vibration and erosion of submerged bodies but also significant flow noise problems. In this paper, flow noise due to cavitation flows around the NACA66 MOD hydrofoil is numerically investigated. The cavitation flow simulation is conducted using the Reynolds-Averaged Navier-Stokes equations based on finite difference methods. To capture the cavitation phenomena accurately and effectively, the homogeneous mixture model with the Merkle's cavitation model is applied. The predicted results are compared with available experimental data in terms of pressure coefficients and volume fraction, which confirms the validity of numerical results. Based on flow field analysis results, hydro-acoustic noise field due to the cavitation flow is predicted using the Ffowcs-Williams and Hawkings equation derived from the Lighthill’s acoustic analogy. The typical lift dipole propagation patterns are identified.
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지능형선박연구본부 (함정공학연구센터)
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