한국전산유체공학회지 (Journal of computational fluids engineering)

한국전산유체공학회 (Korean Society of Computational Fluids Engineering)
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DEVELOPMENT OF CAVITATION EROSION PREDICTION METHOD AND ITS APPLICATION FOR MARINE PROPELLER

  • 박선호 (한국해양대학교 해양공학과) ;
  • 이신형 (서울대학교 조선해양공학과)
  • Park, S. (Dept. of Ocean Engineering, Korea Maritime and Ocean Univ.) ;
  • Rhee, S.H. (Dept. of Naval Architecture and Ocean Engineering, Seoul Nat'l Univ.)
  • 투고 : 2013.07.30
  • 심사 : 2013.09.03
  • 발행 : 2013.09.30
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초록

In the present study, a practical method to predict cavitation erosion, which caused a critical damage on hydraulic machineries, was developed. Impact and critical velocities were defined to develop a practical method for the prediction of cavitation erosion. To develope the practical method, the computational fluid dynamics (CFD) was introduced. Cavitating flows with erosion in a converging-diverging nozzle and around a hydrofoil were simulated by developed and validated code. Based on the CFD results, the cavitation erosion coefficient was derived by a curve fitting method. The cavitation erosion coefficient was formulated as the function of the cavitation and Reynolds numbers. A cavitating flow in an axisymmetric nozzle followed by radial divergence was simulated to validate the developed practical method. For the application to a propeller, a cavitating flow around a propeller was simulated. Predicted damage extent showed similar with damaged full-scale propeller blade.

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과제정보

연구 과제 주관 기관 : 국방과학연구소, 지식경제부

참고문헌

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