전진 운동을 고려한 수중운동체 주위 공동 수치해석 (NUMERICAL PREDICTION OF THE CAVITATION AROUND AN UNDERWATER BODY CONSIDERING SURGE MOTION)

서지정보

· 발행기관 : 한국전산유체공학회
· 수록지 정보 : 한국전산유체공학회지 / 28권 / 3호 / 42 ~ 50페이지
· 저자명 : 김제인, 박일룡, 서성부, 김민재, 구가람, 김태우, 김선홍

초록

This paper presents the numerical prediction of the forward speed and moving distance of an underwater body including the analysis of the unsteady characteristics of cavitation developing around the body according to speed change. The flow was assumed to be two-phase incompressible turbulent flow and solved by using the unsteady Reynolds averaged Navier-Stokes method that includes a cavitation model explaining the phase change between the water and vapour. The temporal change of the speed and moving distance of the underwater body estimated from the 1DoF motion analysis showed a satisfactory agreement with the measured results in the underwater test. In addition, the time variations of the cavity predicted along with the speed change of the body also showed a reasonable agreement with the cavity observation of the underwater test. Through this study, we were able to properly explain the drag and speed changes of the underwater body linked to the development of the cavity.

영어초록

This paper presents the numerical prediction of the forward speed and moving distance of an underwater body including the analysis of the unsteady characteristics of cavitation developing around the body according to speed change. The flow was assumed to be two-phase incompressible turbulent flow and solved by using the unsteady Reynolds averaged Navier-Stokes method that includes a cavitation model explaining the phase change between the water and vapour. The temporal change of the speed and moving distance of the underwater body estimated from the 1DoF motion analysis showed a satisfactory agreement with the measured results in the underwater test. In addition, the time variations of the cavity predicted along with the speed change of the body also showed a reasonable agreement with the cavity observation of the underwater test. Through this study, we were able to properly explain the drag and speed changes of the underwater body linked to the development of the cavity.

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