Journal of Naval Architecture and Marine Engineering最新文献_第6页

Thermal diffusion and chemical reaction effects on unsteady flow past a vertical porous plate with heat source dependent in slip flow regime 滑移流动中热源依赖垂直多孔板非定常流动的热扩散和化学反应效应

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-06-15 DOI: 10.3329/JNAME.V13I1.20773

N. Kumar, Rushi Kumar, A. Kumar

引用次数: 13

SORET AND DUFOUR EFFECTS ON MHD HEAT AND MASS TRANSFER FLOW OF A MICROPOLAR FLUID WITH THERMOPHORESIS PARTICLE DEPOSITION 热泳微粒沉积对微极流体MHD传热传质流动的影响

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-06-15 DOI: 10.3329/JNAME.V13I1.23974

P. S. Reddy, Ali J. Chamkha

引用次数: 21

Approximate analytical solutions of MHD viscous flow MHD粘性流动的近似解析解

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-06-15 DOI: 10.3329/JNAME.V13I1.24387

V. Awati

引用次数: 0

Data analysis methodologies for hydrodynamic experiments in waves 波浪中水动力实验的数据分析方法

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-06-15 DOI: 10.3329/JNAME.V13I1.25347

M. Islam, F. Jahra, Scott Hiscock

{"title":"Data analysis methodologies for hydrodynamic experiments in waves","authors":"M. Islam, F. Jahra, Scott Hiscock","doi":"10.3329/JNAME.V13I1.25347","DOIUrl":"https://doi.org/10.3329/JNAME.V13I1.25347","url":null,"abstract":"This paper presents the methodologies developed in order to quality control and analyze the data acquired in hydrodynamic seakeeping experiments of physical models in waves. In such experiments, the data file consists of wave elevations and directions, loads, motions, velocities and accelerations of one or multiple bodies. Additionally, mooring, slamming, sea-fastening, fender and other vessel specific load data may be acquired, which requires special analysis technique. Data products of such experiments are primarily consist of the basic statistics of each of the acquired data channels selected segments. Various wave statistics are produced to estimate the significant and other percentile of peaks/troughs/heights of each relevant data signal. This is done for the wave segment using zero crossing analysis. The response amplitude operator analysis is done through spectral analysis. Weibull analysis is done to estimate the maximum and minimum of an occurrence in a projected time. Analysis routines are written to incorporate each of these analysis techniques to produce results both in tabular and graphical formats. Analysis technique for decay experiments in multiple directions of motion, which are integral parts of any sea-keeping experiments, is also presented. Examples of all such analysis are provided where appropriate.","PeriodicalId":55961,"journal":{"name":"Journal of Naval Architecture and Marine Engineering","volume":"13 1","pages":"1-15"},"PeriodicalIF":1.8,"publicationDate":"2016-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3329/JNAME.V13I1.25347","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69515418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Numerical simulation of turbulent boundary layers of surfaces covered with foul release and antifouling coatings 涂有污垢释放和防污涂层表面湍流边界层的数值模拟

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-06-15 DOI: 10.3329/JNAME.V13I1.26017

S. Kianejad, N. Ansarifard

引用次数: 2

Numerical study of various geometries of breakwaters for the installation of floating wind turbines 安装浮式风力发电机用防波堤不同几何形状的数值研究

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-06-15 DOI: 10.3329/JNAME.V13I1.22866

Keyvan Esmaeelpour, R. Shafaghat, R. Alamian, R. Bayani

{"title":"Numerical study of various geometries of breakwaters for the installation of floating wind turbines","authors":"Keyvan Esmaeelpour, R. Shafaghat, R. Alamian, R. Bayani","doi":"10.3329/JNAME.V13I1.22866","DOIUrl":"https://doi.org/10.3329/JNAME.V13I1.22866","url":null,"abstract":"The everyday growing populations all over the world and the necessity of increase in consumption of fossil energies have made the human to discover new energy resources, which are clean, cheap and renewable. Wind energy is one of the renewable energy resources. Considerable wind speed has made settling of wind turbines at sea beneficial and appealing. For this purpose, choosing the appropriate plates to set up wind turbines on the surface of sea is necessary. Regarding the installation condition, by choosing suitable geometry for floating breakwaters, offshore wind turbine can be mounted on them. Suitable geometry of breakwater for multifunctional usage could be selected with analyzing and comparing pressure, force and moment produced by incoming waves. In this article, we implement boundary element method to solve governing differential equations by assuming potential flow. On the other hand, for promoting free surface in each time step, we employed Euler-Lagrangian method. Finally, to find the appropriate geometry for installing the wind turbine on the breakwater, moment and wave profile next to the right and left side of breakwater body are calculated. Among simulated geometries, breakwater with trapezoid geometry which its larger base is placed in the water has more sustainability and it is the most suitable geometry for wind turbine installation.","PeriodicalId":55961,"journal":{"name":"Journal of Naval Architecture and Marine Engineering","volume":"13 1","pages":"27-37"},"PeriodicalIF":1.8,"publicationDate":"2016-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3329/JNAME.V13I1.22866","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69515006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

INVESTIGATION OF THE MECHANICAL PROPERTIES OF NANOCOMPOSITE SWCNTS/EPOXY BY MICROMECHANICS METHODS AND EXPERIMENTAL WORKS 采用细观力学方法和实验研究了纳米cnts /环氧复合材料的力学性能

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2015-12-30 DOI: 10.3329/JNAME.V12I2.24665

H. S. Hedia, S. Aldousari, A. Abdellatif, G. S. A. Hafeez

{"title":"INVESTIGATION OF THE MECHANICAL PROPERTIES OF NANOCOMPOSITE SWCNTS/EPOXY BY MICROMECHANICS METHODS AND EXPERIMENTAL WORKS","authors":"H. S. Hedia, S. Aldousari, A. Abdellatif, G. S. A. Hafeez","doi":"10.3329/JNAME.V12I2.24665","DOIUrl":"https://doi.org/10.3329/JNAME.V12I2.24665","url":null,"abstract":"In the present paper, the stiffening effect of carbon nanotubes is quantitatively investigated by micromechanics methods. The Mori-Tanaka effective-field method is employed to calculate the effective elastic moduli of composites with aligned or randomly oriented straight nanotubes. In addition, the epoxy resin is modified experimentally by adding SWCNT with different ratio i.e 0, 0.1, 0.3, 0.5 and 0.7 wt.-% . A comparison between the results for SWCNT/epoxy nanocomposite which obtained analytically and experimentally is done. In the experimental work the epoxy resin is modified by adding SWCNT with different ratio i.e 0, 0.1, 0.3, 0.5 and 0.7 wt.-% . The materials are characterized in tension to obtain the mechanical properties of SWCNT/epoxy nanocomposite experimentally. The results of micromechanics methods indicated that the CNTs are highly anisotropic, with Young’s modulus in the tube direction two orders of magnitude higher than that normal to the tube. The results shows a nanotube volume fraction of 0.3%of SWCNT improve all mechanical properties such as the tensile strength, modulus of elasticity and the toughness. Avoid the volume fraction greater than 0.5% SWCNT. The optimal value achieved experimentally, (at 0.3% SWCNT) lies between the analytical values (that achieved parallel to the CNT and the randomly orientated straight CNTs ) .","PeriodicalId":55961,"journal":{"name":"Journal of Naval Architecture and Marine Engineering","volume":"12 1","pages":"103-114"},"PeriodicalIF":1.8,"publicationDate":"2015-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3329/JNAME.V12I2.24665","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69515023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Resistance reduction on trimaran ship model by biopolymer of eel slime 鳗鱼黏液生物聚合物降低三体船模型阻力

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2015-12-30 DOI: 10.3329/JNAME.V12I2.19549

Y. Yanuar, G. Gunawan, M. A. Talahatu, R. T. Indrawati, A. Jamaluddin

{"title":"Resistance reduction on trimaran ship model by biopolymer of eel slime","authors":"Y. Yanuar, G. Gunawan, M. A. Talahatu, R. T. Indrawati, A. Jamaluddin","doi":"10.3329/JNAME.V12I2.19549","DOIUrl":"https://doi.org/10.3329/JNAME.V12I2.19549","url":null,"abstract":"Resistance reduction in ship becomes an important issue to be investigated. Energy consumption and its efficiency are related toward drag reduction. Drag reduction in fluid flow can be obtained by providing polymer additives, coating, surfactants, fiber and special roughness on the surface hull. Fish skin surface coated with biopolymers viscous fluid (slime) is one method in frictional resistance reduction. The aim of this is to understanding the effect of drag reduction using eel slime biopolymer in unsymmetrical trimaran ship model. The Investigation was conducted using towing tank test with variation of velocity. The dimension of trimaran model are L = 2 m, B = 0.20 m and T = 0.065 m. The ship model resistance was precisely measured by a load cell transducer. The comparison of resistance on trimaran ship model coated and uncoated by eel slime are shown on the graph as a function of the total drag coefficient and Froude number. It is discovered the trimaran ship model by eel slime has higher drag reduction compared to trimaran with no eel slime at similar displacement. The result shows the drag reduction about 11 % at Fr 0.35.","PeriodicalId":55961,"journal":{"name":"Journal of Naval Architecture and Marine Engineering","volume":"12 1","pages":"95-102"},"PeriodicalIF":1.8,"publicationDate":"2015-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3329/JNAME.V12I2.19549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69514634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

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

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2015-12-30 DOI: 10.3329/JNAME.V12I2.22351

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

{"title":"Introducing a particular mathematical model for predicting the resistance and performance of prismatic planing hulls in calm water by means of total pressure distribution","authors":"P. Ghadimi, S. Tavakoli, M. A. F. Chekab, A. Dashtimanesh","doi":"10.3329/JNAME.V12I2.22351","DOIUrl":"https://doi.org/10.3329/JNAME.V12I2.22351","url":null,"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.","PeriodicalId":55961,"journal":{"name":"Journal of Naval Architecture and Marine Engineering","volume":"12 1","pages":"73-94"},"PeriodicalIF":1.8,"publicationDate":"2015-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3329/JNAME.V12I2.22351","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69514959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

Dual solutions for radiative MHD forced convective flow of a nanofluid over a slendering stretching sheet in porous medium 多孔介质中纳米流体在细长拉伸片上的辐射MHD强迫对流的对偶解

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2015-12-30 DOI: 10.3329/JNAME.V12I2.23638

C. Sulochana, N. Sandeep

引用次数: 32