Engineering Review最新文献_第10页

Bubble evolution in the titanium alloy melt under vertical centrifugal field 钛合金熔体在垂直离心力场作用下的气泡演化

IF 0.4

Engineering Review Pub Date : 2020-04-01 DOI: 10.30765/er.40.2.03

Qin‐Qin Xu, Xing Wang, Shi-ping Wu

{"title":"Bubble evolution in the titanium alloy melt under vertical centrifugal field","authors":"Qin‐Qin Xu, Xing Wang, Shi-ping Wu","doi":"10.30765/er.40.2.03","DOIUrl":"https://doi.org/10.30765/er.40.2.03","url":null,"abstract":"The bubble evolution in the liquid titanium melt under vertical centrifugal field has been studied by the hydraulic experiment simulation. The bubble migration process in the simple and complex cavities, the bubble morphology, bubble dimensional size diversification under different mould rotational speed has been investigated. The results show that the mould wall has a blocking effect on the bubble migration. The bubble migration in the simple cavity deviates from the line between the bubble initial position and the rotation shaft of the casting mould. Also, the bubbles in the complex cavity gather, re-nucleate and form new big ones for the blocking effect of the complex geometry shape on the radial movement of the bubble. The shape of bubbles in both the simple and complex cavity during the migration process is not a perfect sphere, but an elliptical shape. The critical size of bubble released from the bubble generation chamber decreases with the increment of the mould rotational speed. The diameter of the gas bubbles in the simple cavity during the migration process become bigger and bigger for the pressure difference at different positions of the cavity in the vertical centrifugal field.","PeriodicalId":44022,"journal":{"name":"Engineering Review","volume":"40 1","pages":"16-23"},"PeriodicalIF":0.4,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46873978","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

Geometric reliability model of the five site redundant structure 五站点冗余结构几何可靠度模型

IF 0.4

Engineering Review Pub Date : 2020-04-01 DOI: 10.30765/er.40.2.02

V. Usenko, O. Kodak, I. Usenko

引用次数: 2

A method for predicting failure load of masonry wall panel based on structural stress state 基于结构应力状态的砌体墙板破坏荷载预测方法

IF 0.4

Engineering Review Pub Date : 2020-04-01 DOI: 10.30765/ER.40.2.01

Yanxia Huang, Q. Huang, L. Cui, Keyue Zhang, Ming Zhang

{"title":"A method for predicting failure load of masonry wall panel based on structural stress state","authors":"Yanxia Huang, Q. Huang, L. Cui, Keyue Zhang, Ming Zhang","doi":"10.30765/ER.40.2.01","DOIUrl":"https://doi.org/10.30765/ER.40.2.01","url":null,"abstract":"This paper proposed a method for predicting the failure loads of masonry wall panels subject to uniformly distributed lateral loading based on a concept of structural stress state. Firstly, the characteristics of the structural stress state of masonry wall panels subjected to uniform distributed lateral loading were investigated through experimental results. Then, a new parameter was proposed to characterize the structural stress state. Next, the relation of the failure loads between a specified base wall panels and other wall panel was established using the proposed parameter. In this way, a method (called as stress state (ST) method) based on structural stress state parameter to predict the failure load of masonry wall panel from the base wall panel was established. The following case studies validated the ST method by comparing the predicted failure load with experimental results as well as those predicted from the existing yield line theory(YLT), the FEA method and the GSED-based cellular automata (CA) method. The ST method provided an innovative way of structural analysis on the basis of structural stress state.","PeriodicalId":44022,"journal":{"name":"Engineering Review","volume":"40 1","pages":"1-9"},"PeriodicalIF":0.4,"publicationDate":"2020-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.30765/ER.40.2.01","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48243492","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

Improved field oriented control for stand alone dual star induction generator used in wind energy conversion 用于风能转换的独立双星感应发电机的改进磁场定向控制

IF 0.4

Engineering Review Pub Date : 2020-04-01 DOI: 10.30765/er.40.2.05

Y. Bendjeddou, R. Abdessemed, E. Merabet

引用次数: 5

Dry magnetic separation technology for the recovery of iron minerals in fine-grained steel slag 细粒钢渣中铁矿物的干式磁选回收技术

IF 0.4

Engineering Review Pub Date : 2020-01-27 DOI: 10.30765/er.40.1.02

L. Shi, N. Wang, G. Cheng

{"title":"Dry magnetic separation technology for the recovery of iron minerals in fine-grained steel slag","authors":"L. Shi, N. Wang, G. Cheng","doi":"10.30765/er.40.1.02","DOIUrl":"https://doi.org/10.30765/er.40.1.02","url":null,"abstract":"Using the MagNet software package, a permanent magnetic circuit was simulated and a sectorially-spliced magnetic system was designed. Consequently, a new roller permanent magnetic separator with different magnetic field intensities in each roller was developed. The modular structural design allows fine-grained minerals with different magnetic susceptibility to be separated in one pass, according to their different processing characteristic. Steel slag, selected from a factory, was crushed, ground and sieved into different particle size ranges for the single-factor magnetic separation experiments. It was determined that the optimum value ranges for the particle size, magnetic separation distance and rotating frequency were 0.15 mm-0.3 mm, 10 mm-12 mm, 40 Hz～60Hz, respectively; using the chosen parameter values of 0.2mm, 11mm, and 40Hz, the concentrate recovery and concentrate grade of the new separation technology reached up to 52.78% and 64.74%, in comparisson with the existing technology. Thus, it was demonstrated that the self-developed separation technology has the potential to improve the iron recovery of the fine-grained steel slag.","PeriodicalId":44022,"journal":{"name":"Engineering Review","volume":"40 1","pages":"7-16"},"PeriodicalIF":0.4,"publicationDate":"2020-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.30765/er.40.1.02","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43615376","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

Performance investigation of a volute porous tongue of a turbocharger turbine 涡轮增压器涡轮蜗壳多孔舌的性能研究

IF 0.4

Engineering Review Pub Date : 2020-01-27 DOI: 10.30765/er.40.1.08

Abderrahmane Chachoua, M. Hamidou, M. Hamel

{"title":"Performance investigation of a volute porous tongue of a turbocharger turbine","authors":"Abderrahmane Chachoua, M. Hamidou, M. Hamel","doi":"10.30765/er.40.1.08","DOIUrl":"https://doi.org/10.30765/er.40.1.08","url":null,"abstract":"The design for better performance of the spiral housing volute used commonly in radial and mixed inflow gas turbines is of prime importance as it affects the machine stage at both design and off design conditions. The tongue of the scroll divides the flow into two streams, and represents a severe source of disturbances, in terms of thermodynamic parameter uniformity, maximum kinetic energy, the right angle of attack to the rotor and minimum losses. Besides, the volute suffers an undesirable effect due to the recirculating mass flow rate in near bottom vicinity of the tongue. The present project is an attempt to design a tongue fitted with cylindrical holes traversing normal to the stream wise direction, where on account of the large pressure difference between the top and the bottom sides of the tongue will force the recirculating flow to go through the rotor inlet. This possibility with its limitations has not yet been explored. A numerical simulation is performed which might provide our suitable objectives. To achieve this goal the ANSYS code is used to build the geometry, generate the mesh, and to simulate the flow by solving numerically the averaged Navier Stokes equations. Apparently, the numerical results show evidence of favorable impact in using porous tongue. The realization of a contact between the main and recirculation flow by drilled holes on the tongue surface leads to a flow field uniformity, a reduction in the magnitude of the loss coefficient, and a 20 % reduction in the recirculating mass flow rate.","PeriodicalId":44022,"journal":{"name":"Engineering Review","volume":"40 1","pages":"59-66"},"PeriodicalIF":0.4,"publicationDate":"2020-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.30765/er.40.1.08","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41589407","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

Ultra low power mixer with out-of-band RF energy harvesting for wireless sensor networks applications 超低功耗混频器带外射频能量采集无线传感器网络应用

IF 0.4

Engineering Review Pub Date : 2020-01-27 DOI: 10.30765/er.40.1.01

Jie Jin, Xianming Wu, Zhijun Li

引用次数: 1

Investigations on force generation and joint properties of dissimilar thickness friction stir corner welded AA 5086 alloy 不同厚度AA 5086合金搅拌摩擦角焊力产生及接头性能研究

IF 0.4

Engineering Review Pub Date : 2020-01-27 DOI: 10.30765/er.40.1.09

M. Krishnan, Senthilkumar Subramaniam

引用次数: 1

Energy transformation without using filter on high resistive load 高阻负载下不使用滤波器的能量转换

IF 0.4

Engineering Review Pub Date : 2020-01-27 DOI: 10.30765/er.40.1.06

Erol Can

{"title":"Energy transformation without using filter on high resistive load","authors":"Erol Can","doi":"10.30765/er.40.1.06","DOIUrl":"https://doi.org/10.30765/er.40.1.06","url":null,"abstract":"In this paper, 9-level, 17-level, 19-level, 21-level, 27-level, and 39- level inverters with SPWM are presented. According to a switching function, the high-multilevel inverter design has been described since a new multi-level inverter structure is considered. The multilevel inverter structure is designed with placing switches and sources on levels. Pulse width modulation, controlling switches in the inverter structure, is also produced by comparison between triangles and sinus signals. Operating sequences of the switches are given in the table in order to demonstrate the inverter operation characteristic with the produced signals. Then, mathematical equations are formed by considering an operation of switches on the load. In simulations and experiments, the 9-level, 17- level, 19-level, 21-level, 27-level, and 39-level inverters are performed on the resistance (R) and inductance (L) loads with different resistance, because it is difficult to generate current and voltage with an acceptable harmonic distortion on the impedances which have high ohmic values. After applications of experimentation and simulation, the obtained results are compared with other published papers of results and the international IEEE standard, which is 5% for harmonic distortions of creating currents and voltages","PeriodicalId":44022,"journal":{"name":"Engineering Review","volume":"40 1","pages":"39-47"},"PeriodicalIF":0.4,"publicationDate":"2020-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49085223","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: 5

Effects of backfill soil on pipeline’s mechanical response subjected to perilous rock impact 危险岩石冲击下回填土对管道力学响应的影响

IF 0.4

Engineering Review Pub Date : 2020-01-27 DOI: 10.30765/er.40.1.04

Jie Zhang, Wei Guo, Hai-yan Li

引用次数: 1