International Journal of Maritime Technology最新文献_第3页

A Review on the Hydrodynamic Characteristics of the SPP Concerning to the Available Experimental Data and Evaluating Regression Polynomial Functions SPP的水动力特性与实验数据的关系及回归多项式函数的评价

International Journal of Maritime Technology Pub Date : 2018-07-01 DOI: 10.29252/ijmt.10.25

S. M. Seyyedi, R. Shafaghat, Negin Donyavizadeh

{"title":"A Review on the Hydrodynamic Characteristics of the SPP Concerning to the Available Experimental Data and Evaluating Regression Polynomial Functions","authors":"S. M. Seyyedi, R. Shafaghat, Negin Donyavizadeh","doi":"10.29252/ijmt.10.25","DOIUrl":"https://doi.org/10.29252/ijmt.10.25","url":null,"abstract":"Article History: Received: 27 May. 2018 Accepted: 14 Aug. 2018 Surface-piercing propellers have been widely used in light and high-speed vessels because of their superior performance. One of the major steps in propeller selection algorithm is the determination of thrust as well as torque hydrodynamic coefficients. For the purpose of simplifying design and selection procedure, some relations are presented for determining hydrodynamic coefficients in some studies, precision, and accuracy of which must be validated due to the importance of the issue as well as having high development and operational costs. Therefore, these issues are evaluated in this study by field study and recognizing the presented relation set as well as acquiring experimental test data. The acquired results show lack of full agreement between semi-experimental relations and experimental data. In the following, due to the limitations of the regression relations presented in the determination of hydrodynamic coefficients, the database was developed from experimental data, the number of series is determined by extracting the regression relations for each series, these relations are used to determine the hydrodynamic coefficient of thrust and torque in the propeller selection algorithm. Finally, a suitable algorithm for selecting the surface-piercing propeller was presented and discussed.","PeriodicalId":34429,"journal":{"name":"International Journal of Maritime Technology","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42341945","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: 0

Across-channel distribution of the mean and tidal flows in the Khuran Channel, Persian Gulf, Iran 伊朗波斯湾胡兰海峡平均和潮汐的跨海峡分布

International Journal of Maritime Technology Pub Date : 2018-07-01 DOI: 10.29252/IJMT.10.1

M. Khosravi, S. M. S. Mousavi, V. Chegini, R. Vennell

{"title":"Across-channel distribution of the mean and tidal flows in the Khuran Channel, Persian Gulf, Iran","authors":"M. Khosravi, S. M. S. Mousavi, V. Chegini, R. Vennell","doi":"10.29252/IJMT.10.1","DOIUrl":"https://doi.org/10.29252/IJMT.10.1","url":null,"abstract":"Article History: Received: 22 Nov. 2017 Accepted: 30 Apr. 2018 The Khuran Channel, Southern Iran (26°45’N), is a topographically complex channel which is open at both ends. Owning to its particular geometry, this narrow channel is subjected to strong tidal currents. Across-channel distribution of the mean and tidal flows were obtained over a semidiurnal tidal cycle in the Khuran Channel where the highest tidal velocity in the third day of the secondary spring tide exceeded 140 cm/s. Velocity profiles were obtained using a 614.4 kHz Teledyne RDI Workhorse Broadband ADCP over 13 repetitions of a cross-channel transect. The 3.1 km long transect ran north/south across the channel. The M2frequencywas separated from the observed current using sinusoidal form functions and the least square regression analysis. Contrary to the previous study in this channel, the mean inflow observed in the deep parts of the channel and mean outflow occurs over the shallow slopes, with the maximum magnitudes (15-20cm/s) near the surface in the north side. The maximum lateral shear and convergence were found over slopes located between the middle and the north side of the channel.","PeriodicalId":34429,"journal":{"name":"International Journal of Maritime Technology","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49179613","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

Linear Modelling of Marine Vessels Fuel Consumption for Ration of Subsidized Fuel 补贴燃料配给下船舶燃料消耗的线性模型

International Journal of Maritime Technology Pub Date : 2018-07-01 DOI: 10.29252/IJMT.10.7

A. Soleymani, Mohammad Hossein Sharifi, P. Edalat, mohammad mahdi sharifi, Samad Karim Zadeh

引用次数: 3

Engineering Critical Assessment for Offshore Pipeline with Semi Elliptical Surface Cracks in Girth Weld – Comparison of FEM and BS7910 Guideline 海洋管道环焊缝半椭圆形表面裂纹的工程临界评估——FEM与BS7910准则的比较

International Journal of Maritime Technology Pub Date : 2018-07-01 DOI: 10.29252/IJMT.10.37

Mohammad Hossein Sharifi, R. Soheili, Ali Shaghaghi Moghaddam, F. Azarsina

引用次数: 0