시운전결과를 이용한 소형Tanker의 추진성능 향상에 관한 연구

Abstract

본 논문에서는 최근 건조된 실적이 있는 소형 tanker 선형 을 대상으로 자료를 조사하여, 그 중 동형급의 2개 선형을 선별하여, 저속비대선과 관련된 기존의 저항 및 추진에 관한 일반이론을 고찰하고, 실적선의 시운전 결과를 비교 해석함으로써 소형 Tanker의 합리적 설계 및 선형 개발의 동기가 부여될 수 있게 하였다.

실적선에 해당하는 공시선은 청구조선공업(주)에서 최근에 건조한 DWT 3750ton class tanker 6척을 공시선A군(2척) 및 공시선B군(4척)으로 구분하였으며, 공시선의 선형비교는 선형요목의 비교와 함께 선체선도(Lines ＆ Offsets)를 근거로 두 선형의 선수(forebody) 및 선미(afterbody)부분의 비척도(fullness)를 비교하여 저항 및 저항 및 추진에 관한 일반이론에 대한 적용성 여부를 고찰하였다. 또한, 두 공시선의 시운전 결과에 따른 추진성능을 비교하고 선형설계에 직접 반영하여, 향후 동형선의 성능예측에 중요한 자료로 제시할 수 있게 하였다.

This paper presents some consideration for designing the hull forms of small tankers.

The author only investigated the major geometric parameters which afects on the hydrodynamic performance of small tankers.

The proven hull forms, recently built by Cheung-Ku Marine Ind. Co., Ltd. , are based to design the practical hull form by improving the slenderness of the ferebody and afterbody.

The author investigated the two types of small tanker(DWT 370ton class tanker, A ＆ B-type, 5ships), and compared the propulsion performance data due to forebody and afterbody shapes with some sea trial data.

In the present paper, in order to study the propulsion performance of the two types(A ＆ B), the following variation been adopted.

－ increasing of the ship's length(LBP)

－ increasing of the displacement of forebody

－ decreasing of the displacement of afterbody

－ moving of the LCB from midship to fore-side

It is concluded that the propulsion performance of "B"-type is superior to "A"-type through the sea trial. From the comparisons, the author found on improved hull form for small tanker.

This paper presents some consideration for designing the hull forms of small tankers.

The author only investigated the major geometric parameters which afects on the hydrodynamic performance of small tankers.

The proven hull forms, recently built by Cheung-Ku Marine Ind. Co., Ltd. , are based to design the practical hull form by improving the slenderness of the ferebody and afterbody.

The author investigated the two types of small tanker(DWT 370ton class tanker, A ＆ B-type, 5ships), and compared the propulsion performance data due to forebody and afterbody shapes with some sea trial data.

In the present paper, in order to study the propulsion performance of the two types(A ＆ B), the following variation been adopted.

－ increasing of the ship's length(LBP)

－ increasing of the displacement of forebody

－ decreasing of the displacement of afterbody

－ moving of the LCB from midship to fore-side

It is concluded that the propulsion performance of "B"-type is superior to "A"-type through the sea trial. From the comparisons, the author found on improved hull form for small tanker.