中低速横框浸水对船舶阻力构件的影响

IF 1.2 Q3 ENGINEERING, MARINE

Journal of Naval Architecture and Marine Engineering Pub Date : 2020-12-30 DOI:10.3329/JNAME.V17I2.48494

I. Kamal, A. Ismail, M. N. Abdullah, Yassen Adnan Ahmed

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引用次数: 2

摘要

与传统的圆形巡洋舰船尾相比，横尾提供了一些优势，减少了船只的阻力。只有在精心设计了合适的横尾浸入比的情况下，才能实现这一点。在本研究中，研究了半排水船体和全排水船体不同横截面积浸入率对阻力部件的影响。基础船体分别基于半排水量和全排水量船体的NPL船体形状和KCS船体形状。NPL船体的横框浸入比以0.5、0.7、0.8和1.0的比例变化。在弗劳德数0.3至0.6时模拟了每种NPL船体形式的阻力。KCS船体的横框浸入比以0.05、0.1、0.15和0.3的比例变化。在弗劳德数0.195、0.23、0.26和0.28下模拟了KCS船体的阻力。对两种船体的横框进行了系统的修改或变化，以研究横框形状或浸入对总阻力和波浪阻力分量的影响。该研究是使用基于RANSE求解器的CFD软件SHIPFLOW 6.3进行的。NPL船体的这些结果表明，横框浸入越大，半排水船舶的阻力就越高。增加的阻力是由额外的摩擦阻力和波浪阻力组成的。KCS船体的结果似乎与从NPL船体获得的结果相矛盾。在KCS船体形式的情况下，较大和较深的横框有时在较高的弗劳德数下是有益的。

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Influence of the transom immersion to ship resistance components at low and medium speeds

The transom stern offered some advantages over the traditional rounded cruiser stern reducing the resistance of a ship. This can only be achieved if the transom stern is carefully designed with suitable transom immersion ratio. In this study, the influence of different transom area immersion ratios on the resistance components was investigated for a semi-displacement hull and a full displacement hull. The base hull was based on NPL hull form and KCS hull form for a semi-displacement and full-displacement hull respectively. The transom immersion ratios for the NPL hull were varied at a ratio of 0.5, 0.7, 0.8 and 1.0. The resistance of each of the NPL hull form was simulated at Froude number 0.3 up to 0.6. The transom immersion ratios for the KCS hull were varied at a ratio of 0.05, 0.1, 0.15 and 0.3. The resistance of each of the KCS hull form was simulated at Froude number 0.195, 0.23, 0.26 and 0.28. The transoms of both hulls were modified or varied systematically to study the influence of the transom shape or immersion on the total and wave resistance components. The investigation was carried out using a CFD software named SHIPFLOW 6.3 based on RANSE solver. These results on the NPL hull shows that the larger the transom immersion, the higher the resistance will be for a semi-displacement vessel. The increased resistance is contributed by additional frictional and wave resistance components. The results for the KCS hull seems to contradict with the results obtained from the NPL hull. The larger and deeper transom for the case of KCS hull form sometimes can be beneficial at higher Froude number.

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来源期刊

Journal of Naval Architecture and Marine Engineering ENGINEERING, MARINE-

CiteScore

2.50

自引率

5.60%

发文量

审稿时长

20 weeks

期刊介绍： TJPRC: Journal of Naval Architecture and Marine Engineering (JNAME) is a peer reviewed journal and it provides a forum for engineers and scientists from a wide range of disciplines to present and discuss various phenomena in the utilization and preservation of ocean environment. Without being limited by the traditional categorization, it is encouraged to present advanced technology development and scientific research, as long as they are aimed for more and better human engagement with ocean environment. Topics include, but not limited to: marine hydrodynamics; structural mechanics; marine propulsion system; design methodology & practice; production technology; system dynamics & control; marine equipment technology; materials science; under-water acoustics; satellite observations; and information technology related to ship and marine systems; ocean energy systems; marine environmental engineering; maritime safety engineering; polar & arctic engineering; coastal & port engineering; aqua-cultural engineering; sub-sea engineering; and specialized water-craft engineering. International Journal of Naval Architecture and Ocean Engineering is published quarterly by the Society of Naval Architects of Korea. In addition to original, full-length, refereed papers, review articles by leading authorities and articulated technical discussions of highly technical interest are also published.