An experimental study on added resistance focused on the effects of bow wave breaking and relative wave measurements

IF 0.6 Q4 ENGINEERING, MARINE

International Shipbuilding Progress Pub Date : 2022-06-14 DOI:10.3233/isp-210018

Vera Hengelmolen, P. Wellens

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引用次数: 1

Abstract

The added resistance is a resistance component that is not yet satisfactorily predicted, although its accurate estimation is crucial – both from an environmental and economic point of view – from the design stage of a ship until its operation. One of the possible sources of overprediction is the occurrence of bow wave breaking. The first aim of this paper is to study the effect of bow wave breaking on added resistance by combining visual observations with resistance tests. On the other hand, as the bow region of a ship appears to be the most dominant contributor to added resistance, this paper introduces a dynamic waterline detection method involving stereo vision. This experimental method is applied to reach the second aim of this paper, which is to stress the importance of the relative wave elevation in the bow region of the ship. By placing stereo rigs inside the hull of a semi-transparent ship, the waterline at each momnent in time can be tracked using an edge detection algorithm. By performing resistance tests on the Delft Systematic Deadrise Series ship model no. 523, the added resistance is observed to be proportional to the relative wave height squared. The data of the experiment and the information necessary to reproduce the experiment are shared through https://doi.org/10.4121/19525852.

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对附加阻力进行了实验研究，重点研究了船首波破碎和相对波测量对附加阻力的影响

虽然从环境和经济的角度来看，从船舶的设计阶段到其运行，其准确的估计是至关重要的，但增加的阻力是一个尚未令人满意地预测的阻力成分。过度预测的可能来源之一是弓形波破碎的发生。本文首先采用目测与阻力试验相结合的方法，研究弓形波破碎对附加阻力的影响。另一方面，由于船首区域对附加阻力的贡献最大，本文介绍了一种基于立体视觉的动态水线检测方法。采用这种实验方法是为了达到本文的第二个目的，即强调船首区域相对波高的重要性。通过在半透明船的船体内放置立体设备，可以使用边缘检测算法跟踪每个时刻的水线。通过对代尔夫特系统舷窗系列船舶模型进行阻力试验。523时，观察到增加的阻力与相对波高的平方成正比。通过https://doi.org/10.4121/19525852共享实验数据和重现实验所需的信息。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Shipbuilding Progress ENGINEERING, MARINE-

CiteScore

2.60

自引率

0.00%

发文量

期刊介绍： The journal International Shipbuilding Progress was founded in 1954. Each year four issues appear (in April, July, September and December). Publications submitted to ISP should describe scientific work of high international standards, advancing subjects related to the field of Marine Technology, such as: conceptual design structural design hydromechanics and dynamics maritime engineering production of all types of ships production of all other objects intended for marine use shipping science and all directly related subjects offshore engineering in relation to the marine environment ocean engineering subjects in relation to the marine environment