Prediction of the Fluctuation Pressures Induced on Ship Hull by a Propeller.(1st Report: Experimental Study)

프로펠러에 의한 선체표면 변동압력의 추정(제1보 : 실험적 연구)

  • 이창섭 (한국기계연구소 대덕선박분소) ;
  • 김기섭 (한국기계연구소 대덕선박분소) ;
  • 서정천 (한국기계연구소 대덕선박분소) ;
  • 최종수 (한국기계연구소 대덕선박분소)
  • Published : 1985.06.01

Abstract

This paper describes the experimental method to predict the propeller induced fluctuating pressure on the hull surface. Cavitations of the three model propellers with varying degree of skews, $0^{\circ},\;36^{\circ}\;and\;72^{\circ}$, were observed and the fluctuating pressure induced by the cavitating propellers in the flat plate above these propellers were measured simultaneously at 9 points in the wake field generated by the wire-mesh screens. Another model propeller designed for the dummy model ship was tested in a similar way behind the dummy model ship. The effects of skew variation on the cavitation patterns and fluctuating pressures were illustrated, and the influence of tip-clearances on the fluctuating pressures was also demonstrated. As a result, it is shown that the level of fluctuating pressure and cavity extent could be controlled to some extent by introducing the skews and tip clearances.

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