KR20010078635A - Ship structure for falling resistance - Google Patents

Ship structure for falling resistance Download PDF

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Publication number
KR20010078635A
KR20010078635A KR1020000006032A KR20000006032A KR20010078635A KR 20010078635 A KR20010078635 A KR 20010078635A KR 1020000006032 A KR1020000006032 A KR 1020000006032A KR 20000006032 A KR20000006032 A KR 20000006032A KR 20010078635 A KR20010078635 A KR 20010078635A
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KR
South Korea
Prior art keywords
ship
wave
wave peak
bulb
high pressure
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KR1020000006032A
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Korean (ko)
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안성목
홍춘범
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김징완
삼성중공업 주식회사
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Priority to KR1020000006032A priority Critical patent/KR20010078635A/en
Publication of KR20010078635A publication Critical patent/KR20010078635A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
    • B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
    • B63B1/06—Shape of fore part
    • B63B1/063—Bulbous bows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
    • B63B1/32—Other means for varying the inherent hydrodynamic characteristics of hulls
    • B63B1/40—Other means for varying the inherent hydrodynamic characteristics of hulls by diminishing wave resistance

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)

Abstract

PURPOSE: Structure of a resistance reducing ship is provided to offset high pressure by generating low pressure around a wave peak forming area from the high pressure, and to reduce the wave peak efficiently around the ship. CONSTITUTION: Side bulbs(101) are arranged on the portside and the starboard of a ship with being symmetrical to each other. The side bulb is placed around the wave peak forming area by high pressure in cruising, and formed and designed according to conditions as main particulars of the ship and flow line angles. The low pressure is formed with placing the side bulbs of the ship around the wave peak forming area by the high pressure during cruising. The wave peak around the ship is reduced efficiently with offsetting the low pressure with the high pressure forming the wave peak.

Description

저항저감 선체구조{Ship structure for falling resistance}Ship structure for falling resistance

본 발명은 저항저감 선체구조에 관한 것으로, 더욱 상세하게는 선박의 개략속도 항해 중에 파고발생영향에 의해 첨두파(wave peak)가 생성되는 부근의 선측에 파저발생영향(low pressure)을 생성시켜 파고발생영향(high pressure)과 서로 상쇄되도록 한 저항저감 선체구조에 관한 것이다.The present invention relates to a structure of a resistance-reducing hull, and more particularly, by generating a low pressure on the side of the ship near the wave peak is generated by the effect of the wave occurrence during rough speed navigation of the vessel The present invention relates to a resistance-reducing hull structure that allows high pressure to be offset from each other.

주지와 같이, 선박이 진행할 때에 만들어지는 파도는 선수파 외에 선수에서 중앙부에 걸쳐 선체가 급하게 넓어지는 부분과 중앙부에서 선미에 걸쳐 급하게 가늘어지는 부분 및 선미부분이 만드는 파도가 있으며, 이와 같은 파도를 만들면서 생기는 저항을 선박의 조파저항이라 한다.As is well known, the waves produced when the ship proceeds include the hull widening from the bow to the middle of the bow, and the sharp tapering and stern from the middle to the stern. The resistance created by this is called the ship's wave resistance.

아울러, 조파저항을 줄이기 위하여 선수부의 수면 아래를 둥근모양으로 돌출시킨 선수를 구상선수라고 통칭하는데, 이 구상선수의 작용은 논리적으로 연구·개발되어 배의 전저항 중에서 조파저항이 차지하는 비율이 큰 고속선에 먼저 채용되었다. 그 뒤에 조파저항이 차지하는 비율이 그다지 크지 않은 탱커나 곡물·광물화물선에도 구상선수를 적절히 설계하면 저항이 감소되는 효과가 있다는 것이 알려져서 최근에는 구상선수가 각종 선형에 널리 채용되고 있다.In addition, in order to reduce the wave resistance, the athlete who protrudes round the surface below the surface of the bow is referred to as a spherical athlete. Was first employed. Thereafter, it is known that the proper design of the bulb bow to tankers, grains, or mineral cargo ships, which have a small proportion of the sowing resistance, has the effect of reducing the resistance. In recent years, the bulb bow is widely used in various linear systems.

구상선수는 선박의 선형과 개략속도 등에 따라 적당한 크기 및 모양의 선수벌브가 선택되며, 그 작용은 선수벌브가 만드는 파도와 선수부 근처의 선체가 만드는 파도가 간섭하여 거의 물결이 일지 않게 되어 선수파뿐만 아니라 선수 중앙부부터 전방에서 일어나는 파도 전체가 작아져서 조파저항이 상당히 적어진다.In the case of the bulbous bow, the bow bulb of the appropriate size and shape is selected according to the linear and the rough speed of the ship, and the action is that the wave made by the bow bulb and the wave made by the hull near the bow are hardly waved. Instead, the whole wave from the center of the bow is smaller and so the harmonic resistance is considerably less.

다시 말해서, 벌브 측면에서의 파저발생영향이 선수에서의 파고발생영향과 서로 상쇄되어 선수에서의 첨두파를 개선하는 데에 영향을 미치는 것이다.In other words, the impact of wave generation on the bulb side cancels out the impact of wave generation on the athlete, thus affecting the improvement of the peak wave in the athlete.

전술한 바와 같이 종래에는 구상선수를 채용하여 선박의 조파저항을 줄이고 있었으나, 근래에는 기술의 발달 및 추진효율의 향상으로 선박의 고속성이 크게 개선되고 있으며, 이러한 고속선에서는 그 첨두파가 선수로부터 매우 후방의 위치에서 생성되어 구상선수에 의한 첨두파 개선 효과가 미미한 문제점이 있다.As described above, in the past, spherical bows have been employed to reduce the harmonic resistance of the ship. However, in recent years, the high speed of the ship has been greatly improved due to the development of technology and the improvement of the propulsion efficiency. Generated at the rear position has a problem that the peak-to-peak improvement effect by the bulbous athlete is insignificant.

즉, 프루드수(Froude number; Fn)가 매우 높은 고속선은 높은 파고발생영향으로 인하여 선측에 첨두파가 생성되고, 이는 결국 과대한 조파저항으로 유발되어 진다. 이러한 현상은 기존의 선수벌브 형태로는 그 벌브 위치와 첨두파와의 거리차로 인하여 개선 효과에 한계가 있다.That is, a high speed ship with a very high Froude number (Fn) generates peak waves at the side due to the high wave generation effect, which is caused by excessive harmonic resistance. This phenomenon is limited to the improvement effect due to the distance difference between the bulb position and the peak wave in the conventional bow bulb type.

따라서, 본 발명은 상기와 같은 종래 기술의 문제점을 해결하고자 제안한 것으로서, 선박의 개략속도 항해 중에 파고발생영향에 의해 첨두파가 생성되는 부근의 선측에 파저발생영향을 생성시켜 파고발생영향과 서로 상쇄되도록 함으로써 선측에서의 첨두파, 즉 조파저항을 효과적으로 개선하는 데 그 목적이 있다.Accordingly, the present invention has been proposed to solve the problems of the prior art as described above, by generating a wave generation effect on the side of the vicinity of the peak wave generated by the wave generation effect during the coarse speed navigation of the ship to the crest occurrence effect and offset each other The purpose is to effectively improve the peak wave, ie, wave resistance, at the side of the ship.

도 1은 본 발명에 따른 저항저감 선체구조가 적용된 선박의 사시도.1 is a perspective view of a vessel to which the resistance reduction hull structure according to the present invention is applied.

도 2는 기준 선형의 선체선도.2 is a hull line diagram of a reference linear.

도 3은 본 발명에 따른 저항저감 선체구조가 적용된 선박의 선체선도.3 is a hull hull diagram of a vessel to which the resistance reduction hull structure according to the present invention is applied.

도 4는 본 발명 선형과 기준 선형의 시간 대비 압력저항계수 변화 그래프.Figure 4 is a graph of the change in pressure resistance coefficient with respect to time of the present invention linear and reference linear.

도 5는 본 발명 선형과 기준 선형의 위치 대비 파형 변화 그래프.Figure 5 is a graph of the waveform change of the position of the present invention linear and reference linear.

도 6은 본 발명 선형과 기준 선형의 파문 비교도.Figure 6 is a ripple comparison of the present invention linear and the reference linear.

*도면의 주요 부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

1 : 선수벌브1: Player Bulb

101 : 측면벌브101: side bulb

이러한 목적을 달성하기 위한 본 발명에 따른 저항저감 선체구조는, 선박의 개략속도 항해 중에 파고발생영향에 의해 첨두파가 생성되는 부근의 선측에 측면벌브가 배치되어 파고발생영향과 서로 상쇄되는 파저발생영향이 생성되는 것을 특징으로 한다.The resistance-reducing hull structure according to the present invention for achieving the above object, the side bulb is disposed on the side of the vicinity of the peak wave generated by the impact of the wave occurrence during rough speed navigation of the vessel, the generation of crest is offset with the impact of wave occurrence The impact is characterized in that it is produced.

이하, 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 대하여 상세히 설명하기로 한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 저항저감 선체구조가 적용된 선박의 사시도로서, 참조부호 1은 선수벌브이며, 101은 측면벌브이다. 도면에는 나타내지 않았으나 측면벌브(101)는 선박의 좌현과 우현에 대칭하게 배치된다.1 is a perspective view of a vessel to which a resistance reduction hull structure according to the present invention is applied, reference numeral 1 denotes a bow bulb, and 101 denotes a side bulb. Although not shown in the figure, the side bulb 101 is disposed symmetrically in the port and starboard of the ship.

측면벌브(101)의 위치는 선박의 개략속도 항해 중에 파고발생영향에 의해 첨두파가 생성되는 부근이며, 측면벌브(101)의 형상은 당해 선박의 주요 특성(main particulars) 및 유선각(flow line angle) 등 여러 조건을 감안하게 설계된다.The position of the side bulb 101 is in the vicinity of the peak wave is generated by the impact of the wave occurrence during the rough speed navigation of the vessel, the shape of the side bulb 101 is the main particulars and the flow line of the vessel It is designed to take into account various conditions such as angle).

상기와 같은 선체구조에서 측면벌브(101)의 작용은 시뮬레이션을 통한 기준 선형과의 비교 결과를 통해 쉽게 이해할 수 있다.The action of the side bulb 101 in the hull structure as described above can be easily understood through a comparison with the reference linear through the simulation.

기준 선형 : 도 2는 기준 선형의 선체선도로서, 통상의 작도방법에 따라 좌측은 선미, 우측은 선수를 나타내고 있다.Reference Linear: FIG. 2 is a hull linear diagram of a reference linear, in which a left side is stern and a right side is a bow according to a conventional drawing method.

본 발명 선형 : 도 3은 측면벌브가 배치된 본 발명 선형의 선체선도로서, 도 2와 동일하게 좌측은 선미, 우측은 선수를 나타내고 있다.Inventive linear: FIG. 3 is a hull linear view of a linear of the present invention in which a side bulb is disposed, and the left side is stern and the right side is a bow as in FIG.

도 4는 본 발명 선형과 기준 선형의 시간 대비 압력저항계수(pressure resistance coefficients) 변화 그래프로서, 실선은 본 발명 선형의 압력저항계수, 점선은 기준 선형의 압력저항계수이다.Figure 4 is a graph of the change in pressure resistance coefficients (time resistance) between the linear and the reference linear of the present invention, the solid line is the pressure resistance coefficient of the linear of the present invention, the dotted line is the pressure resistance coefficient of the reference linear.

도 5는 본 발명 선형과 기준 선형의 위치 대비 파형(wave profiles) 변화 그래프로서, 실선은 본 발명 선형의 파형, 점선은 기준 선형의 파형이다.FIG. 5 is a graph showing a change in position profiles of the present invention linear and the reference linear, wherein the solid line is the waveform of the present invention and the dotted line is the waveform of the reference linear.

도 6은 본 발명 선형과 기준 선형의 파문(wave patterns) 비교도로서, 하측은 본 발명 선형의 파문, 상측은 기준 선형의 파문이다.Figure 6 is a comparison of the wave patterns of the present invention linear and the reference linear, the lower side is the ripple of the present invention, the upper side is the ripple of the reference linear.

도 4 내지 도 6을 통해 알 수 있듯이 본 발명 선형은 기준 선형과 비교할 때에 압력저항계수와 파형 및 파문이 모두 개선되었음을 알 수 있다.As can be seen from Figures 4 to 6 it can be seen that the linearity of the present invention is improved both the pressure resistance coefficient and the waveform and ripple when compared to the reference linear.

상기의 시뮬레이션 결과를 통해 알 수 있듯이 선박의 개략속도 항해 중에 파고발생영향에 의하여 첨두파가 생성되는 부근의 선측에 측면벌브(101)가 배치되면 이 측면벌브(101)에 의해 파저발생영향이 생성되며, 이 파저발생영향은 첨두파를 생성하는 파고발생영향과 서로 상쇄되어 선측에서의 첨두파, 즉 조파저항을 효과적으로 개선한다.As can be seen from the simulation results, the side bulb 101 is generated by the side bulb 101 when the side bulb 101 is disposed near the side where the peak wave is generated due to the wave occurrence effect during the ship's coarse speed navigation. This crest generation effect cancels each other with the crest occurrence effect that generates the peak wave, thereby effectively improving the peak wave at the side, that is, the wave resistance.

상술한 바와 같이 본 발명은, 선박의 개략속도 항해 중에 파고발생영향에 의해 첨두파가 생성되는 부근의 선측에 파저발생영향을 생성시켜 파고발생영향과 서로 상쇄되도록 함으로써 선측에서의 첨두파, 즉 조파저항을 효과적으로 개선하는 효과가 있다.As described above, in the present invention, the peak wave at the ship side, that is, the wave wave, is generated by generating a wave generation effect on the side of the ship near the peak wave generation due to the wave generation effect during the coarse speed navigation of the ship. It has the effect of effectively improving the resistance.

Claims (1)

선박의 개략속도 항해 중에 파고발생영향에 의해 첨두파가 생성되는 부근의 선측에 측면벌브가 배치되어 상기 파고발생영향과 서로 상쇄되는 파저발생영향이 생성되는 것을 특징으로 하는 저항저감 선체구조.Reduction resistance hull structure characterized in that the side bulb is disposed on the side of the vicinity of the peak wave generated by the impact wave occurrence during the voyage of the ship's rough speed to generate the wave impact effect canceled with the impact effect.
KR1020000006032A 2000-02-09 2000-02-09 Ship structure for falling resistance KR20010078635A (en)

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