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Numerical study on a new design of solid-fuel ramjet combustor with swirl flow 一种新型旋流固体燃料冲压发动机燃烧室设计的数值研究
FES Journal of Engineering Sciences Pub Date : 2019-10-05 DOI: 10.52981/fjes.v8i2.102
O. Musa, Chen Xiong, Guoping Huang
{"title":"Numerical study on a new design of solid-fuel ramjet combustor with swirl flow","authors":"O. Musa, Chen Xiong, Guoping Huang","doi":"10.52981/fjes.v8i2.102","DOIUrl":"https://doi.org/10.52981/fjes.v8i2.102","url":null,"abstract":"A new design of solid-fuel ramjet is proposed and examined numerically in this paper. Multi-physics coupling code is developed using FORTRAN and parallel computing to solve the problems of multi-physics coupling of fluid mechanics, solid pyrolysis, heat transfer, thermodynamics, and chemical kinetics. Simulations are carried out for the proposed design then the results are compared with the classic design of the solid-fuel ramjet. It is found that the proposed design has improved the regression rate significantly; besides, the amount of released solid fuel is increased for the same size. A new flame has been observed inside the combustion chamber of the proposed design then the two flamed were emerged in the afterburning chamber.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121550136","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
On design of a robust decentralized controller for an interconnected multi-area power system with FACTS devices 基于FACTS装置的多区域互联电力系统鲁棒分散控制器设计
FES Journal of Engineering Sciences Pub Date : 2019-10-05 DOI: 10.52981/FJES.V8I2.118
Gomaa Haroun Ali Hamid
{"title":"On design of a robust decentralized controller for an interconnected multi-area power system with FACTS devices","authors":"Gomaa Haroun Ali Hamid","doi":"10.52981/FJES.V8I2.118","DOIUrl":"https://doi.org/10.52981/FJES.V8I2.118","url":null,"abstract":"In this article, a robust active disturbance rejection control (ADRC) is proposed for load frequency control (LFC) of an interconnected multi-area power system. Two widely employed test systems, namely, two-areas and four-areas hydro-thermal power utilities are concerned to validate the efficacy of the suggested method. To enhance the performance of the system, series flexible ac transmission system (FACTS) like thyristor controlled series compensator (TCSC) and thyristor controlled phase shifter (TCPS) are considered. The simulation results indicated that the system performance is improved with the inclusion of FACTS devices. The adjustable parameters of the proposed FACTS controllers are optimized using particle swarm optimization (PSO) algorithm employing an Integral of Time multiplied Absolute Error (ITAE) criterion. The investigations showed  that the proposed controller provides better dynamic performance than others from the point of view of settling time, peak over/undershoot. Finally, the sensitivity analysis of the system is inspected by varying the system parameters and operating load conditions from their pre-specified values. It is observed that the suggested controller based optimization algorithm is robust and performs satisfactorily with the variations in operating load conditions, system parameters and load patterns.  ","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115841858","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
Performance Evaluation of Optical Fiber Current Transformer based Over-current Protection 基于过流保护的光纤电流互感器性能评价
FES Journal of Engineering Sciences Pub Date : 2019-05-27 DOI: 10.52981/fjes.v8i1.8
Sulieman Eldoud Bashir Ahmed
{"title":"Performance Evaluation of Optical Fiber Current Transformer based Over-current Protection","authors":"Sulieman Eldoud Bashir Ahmed","doi":"10.52981/fjes.v8i1.8","DOIUrl":"https://doi.org/10.52981/fjes.v8i1.8","url":null,"abstract":"Optical Fiber Current transformers (OFCTs) are achieving increased acceptance and use in high voltage system due to their superior performance characteristics. It brings new feature to modern power system protection such as high accuracy, low weight, easy installation, and no-saturation. In this paper, a new OFCT is designed and implemented a long with a digital numeric system to protect electrical-feeder from over-current due to faults. Both the optical sensing head and electronic processing block are illustrated. A detailed experimental study to confirm the performances of the device is also reported. According to the measured values of ac rms current up to 2 kA, a calibration procedure was performed. The operational characteristics of the OFCT are investigated and three different scenarios based on Prototype were carried-out to evaluate the operation of the over-current protection using OFCT. The experiential results clearly illustrate the OFCT is capable to eliminate the distortion of the electrical signals caused by conventional (CT) and hence, greatly improving the reliability of the numerical protection system.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114653214","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
Homotopy Perturbation Transform Method for Extensible Beam Equations 可扩展梁方程的同伦摄动变换方法
FES Journal of Engineering Sciences Pub Date : 2019-05-16 DOI: 10.52981/fjes.v8i1.14
K. A. Ishag, Faris Azhari Okasha
{"title":"Homotopy Perturbation Transform Method for Extensible Beam Equations","authors":"K. A. Ishag, Faris Azhari Okasha","doi":"10.52981/fjes.v8i1.14","DOIUrl":"https://doi.org/10.52981/fjes.v8i1.14","url":null,"abstract":"In this paper, we apply analytical method (homotopy perturbation transformmethod), for solving extensible beam, we discuss certain initial- boundary value problems for the nonlinear equation. This equation wasproposed by Woiniwsky- Krieger as a model for transverse deflection of an extensible beam of natural length whose ends are held a fixed distance apart.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123087290","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
The Investigation of General Solution in Free Datum Networks 自由基准网络通解的研究
FES Journal of Engineering Sciences Pub Date : 2019-05-16 DOI: 10.52981/fjes.v8i1.7
M. O. Ahmed
{"title":"The Investigation of General Solution in Free Datum Networks","authors":"M. O. Ahmed","doi":"10.52981/fjes.v8i1.7","DOIUrl":"https://doi.org/10.52981/fjes.v8i1.7","url":null,"abstract":"The datum of survey control networks sometimes cannot be defined because there is no position of fixed points is provided. In these types of networks the solution can be obtained by what is known as general solution of free datum networks. Actually, the datum in free networks is defined by additional datum constraints to solve the problem of singularity of the normal equations matrix. To solve the problem of datum defect, the unknown parameters of the datum are required to be fixed. These constraints can be established for a part or all points of the network to define the reference frame of the control network in several ways. The adjustment obtained using full datum constraints is called free or relative datum adjustment. In this research, the various forms of datum constraints are established and investigated in order to distinguish between them. More than one solution models applied individually as different cases to be compared with others. Conclusions drawn that the optimum solution with minimum norm and minimum trace is that the general solution using full constraints matrix, it gives the same coordinate differences obtained by others. Then it can be widely used in solution of survey control networks used in many types of networks such as these applied in deformation monitoring field.  Another conclusion is that the suitability of the general solution form for all other chosen datums. Any fixed datum solution can be obtained from the general solution by adding a scalar calculated from height(s) of the reference fixed point(s).","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133171306","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
Beneficiation of Low-Grade and High-Phosphorus Iron Ore of Bajrawia, Sudan by Reverse Anionic Flotation: Potential of Microwave Treatment 反阴离子浮选法选矿苏丹Bajrawia低品位高磷铁矿石:微波处理的潜力
FES Journal of Engineering Sciences Pub Date : 2019-05-16 DOI: 10.52981/fjes.v8i1.100
Ahmed Mohammedelmubarak Abbaker, E. M. Moslim, M. S. Elsalmawy
{"title":"Beneficiation of Low-Grade and High-Phosphorus Iron Ore of Bajrawia, Sudan by Reverse Anionic Flotation: Potential of Microwave Treatment","authors":"Ahmed Mohammedelmubarak Abbaker, E. M. Moslim, M. S. Elsalmawy","doi":"10.52981/fjes.v8i1.100","DOIUrl":"https://doi.org/10.52981/fjes.v8i1.100","url":null,"abstract":"Deposits of low grade and high-phosphorus iron ores are spreading globally, however, the usage of this kind of deposits in the manufacturing of steel bounded because of the high-phosphorus content as well as depression of iron in which affect the quality of the produced steel. The Bajrawia iron ore deposit is one of the largest in Sudan but it only contains (35.5% Fe) and undesirable amount of phosphorus (0.37% P). This paper investigated the utilization of reverse anionic flotation (RAF) for the upgrading of iron and dephosphorization. Additionally, the effect of microwave pre-treatment on forth flotation performance on a laboratory scale. Microwave pre-treatment was applied on optimized reverse anionic flotation parameters in an account of iron grade (47.31% Fe), iron recovery (86.43%) and phosphorus content (0.167% P). The findings into the microwave pre-treatment are quite promising. This investigation has revealed that microwave heating improves the flotation response of iron grade to (51.94%) and phosphorus content decreases into (0.127% P) due to increasing the liberation.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122234764","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
Mineralogical and Chemical Characterization of Bajrawia Iron Ore, Sudan 苏丹Bajrawia铁矿矿物学及化学特征
FES Journal of Engineering Sciences Pub Date : 2019-03-28 DOI: 10.52981/fjes.v8i1.3
Ahmed Mohammedelmubarak Abbaker, E. M. Moslim, M. S. Elsalmawy
{"title":"Mineralogical and Chemical Characterization of Bajrawia Iron Ore, Sudan","authors":"Ahmed Mohammedelmubarak Abbaker, E. M. Moslim, M. S. Elsalmawy","doi":"10.52981/fjes.v8i1.3","DOIUrl":"https://doi.org/10.52981/fjes.v8i1.3","url":null,"abstract":"In this contribution, the mineralogical and chemical characterization of Bajrawia iron ore is investigated. The chemical analysis was conducted using atomic absorption spectroscopy, X-ray Fluorescence, Energy Dispersive X-ray and titration. The mineralogical characterization was obtained by optical microscopy and X-ray diffraction. The physical properties such as densities, water content and porosity were determined. It was found that Bajrawia iron ore contains about 35.5% Fe and some impurities like phosphorus and silica. Goethite is the major iron mineral associated with minor contents of hematite, kaolinite and quartz. SEM photo showed that the main minerals are goethite, clay minerals and quartz. The ore has low density because it has high porosity degree. This type of iron ore is disseminated in rock matrix and would be difficult to process.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"83 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116489950","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
Finite Element Analysis of Rectangular Beams 矩形梁的有限元分析
FES Journal of Engineering Sciences Pub Date : 2019-03-06 DOI: 10.52981/fjes.v8i1.11
Abusamra Attaelmanan, A. Ali
{"title":"Finite Element Analysis of Rectangular Beams","authors":"Abusamra Attaelmanan, A. Ali","doi":"10.52981/fjes.v8i1.11","DOIUrl":"https://doi.org/10.52981/fjes.v8i1.11","url":null,"abstract":"This paper is concerned with the analysis of simply supported beam using MATLAB programming language and structural analysis program SAP2000. The beam was discretized into rectangular elements using finite element method. Three patterns of different dimensions and numbers of rectangular elements were used to verify the results of vertical displacements and stresses obtained by MATLAB and SAP 2000.The development of four noded isoparametric quadrilateral membrane elements in MATLAB programming language is presented. The membrane elements developed are plane strain condition. The considered patterns were analyzed as shell elements using SAP2000. A finite element program is also developed using MATLAB to check the accuracy of the developed elements.","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114169040","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
Analysis of Blast Resistant Structure (TNT Storage Case Study) 防爆结构分析(TNT仓库案例研究)
FES Journal of Engineering Sciences Pub Date : 1900-01-01 DOI: 10.52981/fjes.v9i1.639
Majdi EL. Mukhtar, Abdelmonim A. Haroun
{"title":"Analysis of Blast Resistant Structure (TNT Storage Case Study)","authors":"Majdi EL. Mukhtar, Abdelmonim A. Haroun","doi":"10.52981/fjes.v9i1.639","DOIUrl":"https://doi.org/10.52981/fjes.v9i1.639","url":null,"abstract":"The explosions produce extreme and unique loading on structures and can cause widespread damage to the building’s structural elements. Design of blast resistant structures provides structural integrity and acceptable levels of safety for buildings. The previous studies show that some structural systems could provide substantial increase in protection against blasts. This paper discussed the behavior of TNT loaded storage (a framed reinforced concrete (. the results of calculated pressure Using Reference (UFC)-3-340-02 [1] Equation and investigated that the average peak reflected pressure close to 5000 Psi. CSI-ETABS Software 3D model shows that the structural system of case study unsafe under 0.5 tons of TNT internal weight charge.  ","PeriodicalId":137077,"journal":{"name":"FES Journal of Engineering Sciences","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123980202","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
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