Journal of Naval Architecture and Marine Engineering最新文献_第7页

The effect of electrical discharge machining parameters on alloy DIN 1.2080 using the Taguchi method and determinant of optimal design of experiments 用田口法研究放电加工参数对DIN1.2080合金的影响及实验优化设计的决定因素

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2017-06-28 DOI: 10.3329/JNAME.V14I1.31632

P. Sadr, A. Kolahdooz, S. A. Eftekhari

{"title":"The effect of electrical discharge machining parameters on alloy DIN 1.2080 using the Taguchi method and determinant of optimal design of experiments","authors":"P. Sadr, A. Kolahdooz, S. A. Eftekhari","doi":"10.3329/JNAME.V14I1.31632","DOIUrl":"https://doi.org/10.3329/JNAME.V14I1.31632","url":null,"abstract":"Electrical Discharge Machining (EDM) process is one of the most widely used methods for machining. This method is used to form parts that conduct electricity. This method of machining has used for hard materials and therefore select the correct values of parameters are so effective on the quality machining of parts. D3 steel has a high abrasion resistance at low temperatures therefore can be a good candidate for this method of machining. Also because of high hardness and low distortion during heat treatment, using this method is economical for this alloy. The purpose of this paper is to investigate the influence of the main parameters such as voltage, current, pulse duration and pulse off time and the interaction of them to determine the optimal condition for the D3 steel alloy (alloy with DIN 1.2080). Chip removal rate (MRR) and surface quality of parts were evaluated as the output characteristic of the study. The optimum conditions were achieved when the MRR is in the highest value and surface roughness is in the lowest one. For investigation of interaction, two kinds of DOE methods (Taguchi and determinant of optimal experimental design) are used. Then the optimal parameters are investigated with the help of the analysis signal to noise (S/N) and mathematical modeling. The optimize results were tested again and compared. Also the results showed that regression modeling has better accuracy than the S/N analysis. This is because of a greater number of experiments that done in this part and taking into account the interaction parameters in the regression model.","PeriodicalId":55961,"journal":{"name":"Journal of Naval Architecture and Marine Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2017-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3329/JNAME.V14I1.31632","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46541553","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: 7

Investigation of blood flow through an artery in the presence of overlapping stenosis 重叠狭窄情况下动脉血流的研究

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2017-06-28 DOI: 10.3329/JNAME.V14I1.31165

K. Prasad, S. Thulluri, M. V. Phanikumari

引用次数: 8

Motion predictions of ships in actual operating conditions using potential flow based solver 基于势流解算器的船舶实际工况运动预测

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2017-06-28 DOI: 10.3329/JNAME.V14I1.28674

M. Rahaman, H. Islam, H. Akimoto, M. R. Islam

引用次数: 5

A preliminary study of the pressure and shear stress on a plane surface beneath a circular cylinder in turbulent flow fields 湍流场中圆柱下平面上压力和剪应力的初步研究

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2017-06-28 DOI: 10.3329/JNAME.V14I1.27967

Jian-Chen Cai, J. Pan, E. Shi-ju, W. Jiao, Dongyun Wang

{"title":"A preliminary study of the pressure and shear stress on a plane surface beneath a circular cylinder in turbulent flow fields","authors":"Jian-Chen Cai, J. Pan, E. Shi-ju, W. Jiao, Dongyun Wang","doi":"10.3329/JNAME.V14I1.27967","DOIUrl":"https://doi.org/10.3329/JNAME.V14I1.27967","url":null,"abstract":"This paper studies the fluctuating forces on a plane surface beneath a circular cylinder in the subcritical flow regime using two-dimensional computational fluid dynamics (CFD). The turbulent flow fields were calculated via numerical solutions of the NavierStokes (NS) equations without a turbulence model (laminar flow computation), large eddy simulation (LES), and Reynolds-Averaged N-S equations (RANS) approach with the shear-stress transport (SST) turbulence model. The primary goal is to evaluate the performance of 2-D turbulence simulation with different approaches and to have preliminary knowledge of the forces on the plane which is important in studying scours and flow-induced vibration in ocean engineering. Results show that although a coarse mesh scheme can only obtain potential flows, the laminar approach with high mesh resolution can adequately simulate turbulent flows at moderate Reynolds numbers. Spatially, the fluctuating forces on the plane surface due to the flow are significant within three times the cylinder diameter in the downstream, and within one cylinder diameter in the upstream of the cylinder. The pressure fluctuations are approximately two orders of magnitude larger than the shear stress fluctuations. In the frequency domain, the fluctuating forces are significant under twice the vortex-shedding frequency. Within one cylinder diameter in the downstream and upstream regions of the cylinder, the pressure fluctuations on the plane surface are well correlated, while the shear stress is not so well correlated.","PeriodicalId":55961,"journal":{"name":"Journal of Naval Architecture and Marine Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2017-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3329/JNAME.V14I1.27967","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42853792","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

Numerical estimation of shallow water effect on multipurpose amphibious vehicle resistance 浅水对多用途水陆两栖车辆阻力影响的数值估计

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2017-06-28 DOI: 10.3329/JNAME.V14I1.26523

M. Nakisa, A. Maimun, Y. Ahmed, F. Behrouzi, A. Tarmizi

引用次数: 11

Dual solutions for heat and mass transfer in chemically reacting radiative non-Newtonian fluid with aligned magnetic field 具有排列磁场的辐射非牛顿流体化学反应的传热传质对偶解

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2017-06-28 DOI: 10.3329/JNAME.V14I1.25907

J. V. R. Reddy, V. Sugunamma, N. Sandeep

{"title":"Dual solutions for heat and mass transfer in chemically reacting radiative non-Newtonian fluid with aligned magnetic field","authors":"J. V. R. Reddy, V. Sugunamma, N. Sandeep","doi":"10.3329/JNAME.V14I1.25907","DOIUrl":"https://doi.org/10.3329/JNAME.V14I1.25907","url":null,"abstract":"Through this paper we investigated the heat and mass transfer in chemically reacting radiative Casson fluid flow over a slandering/flat stretching sheet in a slip flow regime with aligned magnetic field. This study is carried out under the influence of non uniform heat source/sink. First we converted the governing equations of the flow into ordinary differential equations by making use of suitable similarity transformations. The obtained non-linear differential equations are solved numerically using Runge-Kutta based shooting technique. Further, graphical representation has been given to study the effects of various physical parameters on velocity, temperature and concentration fields. Also numerical computations has been carried out to investigate the influence of the physical parameters involved in the flow on skin friction, rate of heat and mass transfer coefficients. Through this investigation, it is observed that aligned angle, Casson parameter and velocity slip parameter have the tendency to control the velocity field. Also heat transfer rate in flat stretching sheet is higher than that of slendering stretching sheet. A good agreement of the present results with the existed literature has been observed.","PeriodicalId":55961,"journal":{"name":"Journal of Naval Architecture and Marine Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2017-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3329/JNAME.V14I1.25907","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43864591","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: 9

Stress distribution in CNT-Aluminum matrix composite by changing distances between CNT bundles 碳纳米管束间距离变化对碳纳米管-铝基复合材料应力分布的影响

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-12-29 DOI: 10.3329/JNAME.V13I2.26658

H. Chowdhury, A. Masud

引用次数: 0

MHD boundary layer slip flow of a casson fluid over an exponentially stretching surface in the presence of thermal radiation and chemical reaction 热辐射和化学反应作用下卡森流体在指数拉伸表面上的MHD边界层滑动流动

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-12-29 DOI: 10.3329/JNAME.V13I2.23537

P. B. A. Reddy

{"title":"MHD boundary layer slip flow of a casson fluid over an exponentially stretching surface in the presence of thermal radiation and chemical reaction","authors":"P. B. A. Reddy","doi":"10.3329/JNAME.V13I2.23537","DOIUrl":"https://doi.org/10.3329/JNAME.V13I2.23537","url":null,"abstract":"An analysis is carried out to investigate the steady two-dimensional magnetohydrodynamic boundary layer flow of a Casson fluid over an exponentially stretching surface in the presence of thermal radiation and chemical reaction. Velocity, thermal and solutal slips are considered instead of no-slip conditions at the boundary. Stretching velocity, wall temperature and wall concentration are considered in the exponential forms. The non-linear partial differential equations are converted into a system of non-linear ordinary differential equations by similarity transformations. The resultant non-linear ordinary differential equations are solved numerically by fourth order Runge-Kutta method along with shooting technique. The influence of various parameters on the fluid velocity, temperature, concentration, wall skin friction coefficient, the heat transfer coefficient and the Sherwood number have been computed and the results are presented graphically and discussed quantitatively. Comparisons with previously published works are performed on various special cases and are found to be in excellent agreement.","PeriodicalId":55961,"journal":{"name":"Journal of Naval Architecture and Marine Engineering","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2016-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.3329/JNAME.V13I2.23537","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69515426","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: 12

Assisted convective heat transfer and entropy generation in a solar collector filled with nanofluid 纳米流体在太阳能集热器中的辅助对流传热和熵生成

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-12-29 DOI: 10.3329/JNAME.V13I2.27774

R. Nasrin, M. A. Alim, M. Hasanuzzzaman

引用次数: 3

Unsteady CFD simulation of 3D AUV hull at different angles of attack 三维AUV船体不同迎角非定常CFD仿真

IF 1.8

Journal of Naval Architecture and Marine Engineering Pub Date : 2016-12-29 DOI: 10.3329/JNAME.V13I2.25849

S. Ray, D. Chatterjee, S. Nandy

引用次数: 2