Introducing a particular mathematical model for predicting the resistance and performance of prismatic planing hulls in calm water by means of total pressure distribution

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2015-12-30 DOI:10.3329/JNAME.V12I2.22351

P. Ghadimi, S. Tavakoli, M. A. F. Chekab, A. Dashtimanesh

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引用次数: 27

Abstract

Mathematical modeling of planing hulls and determination of their characteristics are the most important subjects in hydrodynamic study of planing vessels. In this paper, a new mathematical model has been developed based on pressure distribution. This model has been provided for two different situations: (1) for a situation in which all forces pass through the center of gravity and (2) for a situation in which forces don not necessarily pass through the center of gravity. Two algorithms have been designed for the governing equations. Computational results have been presented in the form of trim angle, total pressure, hydrodynamic and hydrostatic lift coefficients, spray apex and total resistance which includes frictional, spray and induced resistances. Accuracy of the model has been verified by comparing the numerical findings against the results of Savitsky's method and available experimental data. Good accuracy is displayed. Furthermore, effects of deadrise angle on trim angle of the craft, position of spray apex and resistance have been investigated.

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介绍了一种用总压分布来预测棱柱形船体在静水中阻力和性能的数学模型

平面船体的数学建模和特性确定是平面船舶水动力研究的重要课题。本文建立了一种新的基于压力分布的数学模型。这个模型适用于两种不同的情况:(1)所有的力都经过重心的情况;(2)力不一定经过重心的情况。对控制方程设计了两种算法。计算结果以纵倾角、总压力、动、静压升力系数、喷淋顶点和总阻力(包括摩擦阻力、喷淋阻力和诱导阻力)的形式给出。通过将数值结果与Savitsky方法的结果和现有的实验数据进行比较，验证了模型的准确性。显示良好的精度。此外，还研究了死升角对艇侧倾角、喷水尖位置和阻力的影响。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.