수중익형 주변 유동장에서의 공동현상과 유동소음에 대한 수치적 연구

DOI QR코드

DOI QR Code

김상현;정철웅;박원규;설한신
Kim, Sanghyeon;Cheong, Cheolung;Park, Warn-Gyu;Seol, Hanshin

  • 투고 : 2015.11.11
  • 심사 : 2016.02.01
  • 발행 : 2016.04.20

초록

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.

키워드

공동현상;균질 혼합 모델;수중익형;수중소음

참고문헌

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과제정보

연구 과제번호 : BK21플러스

연구 과제 주관 기관 : 부산대학교