Journal of Karary University for Engineering and Science最新文献_第7页

Development of a Computer Based Gas Turbine Instruments Test system 基于计算机的燃气轮机仪表测试系统的开发

Journal of Karary University for Engineering and Science Pub Date : 2021-12-21 DOI: 10.54388/jkues.v1i2.70

E. T. Yousif, Faris Osman Mohamed, A. Alamin

{"title":"Development of a Computer Based Gas Turbine Instruments Test system","authors":"E. T. Yousif, Faris Osman Mohamed, A. Alamin","doi":"10.54388/jkues.v1i2.70","DOIUrl":"https://doi.org/10.54388/jkues.v1i2.70","url":null,"abstract":"Due to the significant importance of gas turbine engines as it is the core of the aircr aft, the engine health status should be tested periodically. Testing methodologies are needed to conduct the engine tests required as a part of airworthiness certification. In this project, a Data Acquisition System (DAQ) was developed as a turboshaft engi ne (GTD 350) testing system. This system was developed to monitor the engine parameters for determining its condition. A PIC 16F877A microcontroller was used as the heart of the DAQ. Internal Analog to Digital Converters (ADC) acquired data from analog sig nals. The analog signals gathered from temperature, tacho generator, throttle, and pressure sensors were transformed into digital format, and then the corresponding data was sent serially to Personal Computer (PC) through a microcontroller serial port. The visual basic program was designed to convert, scale, and display these data. Furthermore, the system was designed to analyze, compare the displayed data with standard stored data, and provides automatically a troubleshooting list whenever upnormal data oc curred. The developed test system had been applied successfully and the results are accurate, reliable, and acceptable.","PeriodicalId":129247,"journal":{"name":"Journal of Karary University for Engineering and Science","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130388068","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

A New Method for Correcting Deviation of Volatiles Content and Chamber Pressure for Single Base Propellant 单基推进剂挥发分含量和室压偏差校正的新方法

Journal of Karary University for Engineering and Science Pub Date : 2021-12-21 DOI: 10.54388/jkues.v1i2.82

H. Elbasher, A. Ibrahim

{"title":"A New Method for Correcting Deviation of Volatiles Content and Chamber Pressure for Single Base Propellant","authors":"H. Elbasher, A. Ibrahim","doi":"10.54388/jkues.v1i2.82","DOIUrl":"https://doi.org/10.54388/jkues.v1i2.82","url":null,"abstract":"In this study, special treatment was applied to two production batches of single-base propellant to correct three of the most important properties in the final product. These properties are internal and external volatile content (IV%, EV% respectively) and chamber pressure, the special treatments depend on mixing two batches with different percentages of mixing starting with sieving and ended with blending to guarantee the homogeneity of the final batch. The batches under study (A and B), batch A with (IV% 0.53%) which must be not less than 0.6%, so it deviated from standard requirement and Bach B with (IV =0.88%), the treatment applied for these batches to generate (C and D) batches. Batch C was a mixture composed of (25% of batch A and 0.75% of batch B). batch D was a mixture composed of (50%batchA and 50% of batch B). Six samples were subjected to sieving and blending according to calculations to correct internal and external volatile content and chamber pressure. For all samples lab, ballistics test, and executive calculations were done. After the test observed that no significant difference between the test and the results of calculations for all samples with different mixing ratios either volatiles content or chamber pressure so according to the result achieved the procedure (Method) was dependable for correcting the deviation of volatiles content and chamber pressure. The selectivity of the optimum mixing ratio can be controlled by using the equation used in this study. The importance of this study in reducing material losses due to the non-conformity of the final product with the specification.","PeriodicalId":129247,"journal":{"name":"Journal of Karary University for Engineering and Science","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130406511","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

Enhancing the Bending Stiffness of Nanosatellite Composite Panel 提高纳米卫星复合材料板的抗弯刚度

Journal of Karary University for Engineering and Science Pub Date : 2021-12-21 DOI: 10.54388/jkues.v1i2.99

Abdulaziz Abdulmajid Sulieman, A. Ibrahim, T. Hassan

{"title":"Enhancing the Bending Stiffness of Nanosatellite Composite Panel","authors":"Abdulaziz Abdulmajid Sulieman, A. Ibrahim, T. Hassan","doi":"10.54388/jkues.v1i2.99","DOIUrl":"https://doi.org/10.54388/jkues.v1i2.99","url":null,"abstract":"The extreme working environment presented in many forms such as inevitable vibrations caused by various sources can lead to problems of the impairment of the nanosatellite functionality and integrity of its structure, as well as weakening the protection of internal components, which may trigger minor structural damage to total failure. To solve these addressed problems in this work, the bending stiffness of square laminated composite panel used in the structure of CubeSat, a version of nanosatellite, has been improved. A literature review for the previous studies and publications related to the current work has been studied. A mathematical equation that describes the stiffness behaviour of the composite panel has been derived based on the classical laminated plate theory (CLPT). The equation of motion (E.O.M) is also derived according to the Euler-Lagrange energy equation of the second kind. For determining the eigenfrequencies and eigenmodes of vibrating panel, Fourier series is used to solve the E.O.M of plate supported with a numerical solution using finite element method (FEM) for verification. The optimisation process is conducted to improve the bending stiffness of the structure, which is indicated by the increased value of first mode fundamental frequency, by finding the optimum stacking sequence for a set of design constraints using Miki Diagram method. The obtained results and conclusion from the addressed problem have been reported at the end of this work presenting the enhanced composite-panel bending stiffness and showed a promising findings that believed to contribute solving problems relevant to structural performance of aerospace structures.","PeriodicalId":129247,"journal":{"name":"Journal of Karary University for Engineering and Science","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128391079","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

Experimental Research on Lethal Range for 122 mm Carbon Fiber Warhead 122 mm碳纤维战斗部杀伤距离试验研究

Journal of Karary University for Engineering and Science Pub Date : 2021-12-21 DOI: 10.54388/jkues.v1i2.83

Ali Zain, Mohammed Abdalla Ayoub Mohammed, Mohamed Fadllala Karar, S. Majeed, A. Mahjoub

引用次数: 0

Design and Implementation of an Encryption Unit to Enhance Satellite Communication Security 一种增强卫星通信安全性的加密单元的设计与实现

Journal of Karary University for Engineering and Science Pub Date : 2021-12-21 DOI: 10.54388/jkues.v1i2.97

Mustafa Atta M. Alhassan, Yasir M.O. Abbas

引用次数: 1

Study the Effect of Using Ceramic Waste Powder as Partial Replacement for Cement on Concrete Properties 研究陶瓷废粉部分替代水泥对混凝土性能的影响

Journal of Karary University for Engineering and Science Pub Date : 2021-11-21 DOI: 10.54388/jkues.v1i1.125

Moatasim Attaelmanan, Mahgoub Elhaj Mahgoub Kambal, Mohammed Izzeldeen Mansour

{"title":"Study the Effect of Using Ceramic Waste Powder as Partial Replacement for Cement on Concrete Properties","authors":"Moatasim Attaelmanan, Mahgoub Elhaj Mahgoub Kambal, Mohammed Izzeldeen Mansour","doi":"10.54388/jkues.v1i1.125","DOIUrl":"https://doi.org/10.54388/jkues.v1i1.125","url":null,"abstract":"Ceramic waste is one of the most active research areas that encompass a number of disciplines including civil engineering and construction materials. Ceramic waste powder is settled by sedimentation and then dumped away which leads to environmental pollution, in addition to forming dust in summer and threatening both agriculture and public health. Therefore, utilization of the ceramic waste powder in various industrial sectors especially the construction, agriculture, glass and paper industries would help to protect the environment. It is most essential to develop eco-friendly concrete from ceramic waste. In this research replacing the (OPC) cement by ceramic waste powder has been studied accordingly in the range of (0, 10, 15, and 20) % by weight of M-30 grade concrete. Concrete mixtures were produced, tested and compared in terms of compressive and tensile strength to the conventional mixture. These tests were carried out to evaluate the mechanical properties for 7 and 28 days. As a result, the CWP cement concretes decreased the workability retention. The values of average hardened concrete density for concrete mixes with CWP cement are higher than the reference mix in 7 days, but lower than the reference mix in 28 days. The maximum value of compressive strengths at 7 and 28 days and tensile strength was achieved at about 5% CWP concrete mix. CWP slowed the compressive strength development especially at early ages. All mixtures with CWP showed good strength development at 28 days. It was observed that all CWP replacement ratios achieved higher compressive strength than characteristic compressive strength which is equal to 30 N/mm2 in 28 days, except the 20% ratio gives 29.72 N/mm2. Test results showed that CWP has potential to be used as an ingredient in concrete mixtures to partially replacing cement. The study showed that concrete mixtures with ceramic waste powder (CWP) had variable performance of the measured properties depending on the replacement level used.","PeriodicalId":129247,"journal":{"name":"Journal of Karary University for Engineering and Science","volume":"2017 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114364752","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

Optimizing Disassembly Line Balancing Problem Using Multi-objective ADAM Optimizer Algorithm 基于多目标ADAM优化算法的拆解线平衡问题优化

Journal of Karary University for Engineering and Science Pub Date : 2021-11-21 DOI: 10.54388/jkues.v1i1.15

Nadir Siddig, Abdallah Mokhtar, Ahmed Abualnor, Zeqiang Zhang

引用次数: 6

Nonlinear Finite Element Modelling and Parametric Study of Prestressed Steel Box Girder 预应力钢箱梁非线性有限元建模及参数化研究

Journal of Karary University for Engineering and Science Pub Date : 2021-11-11 DOI: 10.54388/JKUES.V1I1.123

Mahgoug Elhaj Mahgoub, Mohammed Awad, M. M. Ali

引用次数: 2

The Simulation of Sudanese Sugar Cane Bagasse Gasification Process Using ASPEN PLUS 利用ASPEN PLUS模拟苏丹甘蔗甘蔗渣气化过程

Journal of Karary University for Engineering and Science Pub Date : 1900-01-01 DOI: 10.54388/jkues.v1i1.8

M. Mutaz, Ibrahim H.Elamin, Hamid M. Mustafa

{"title":"The Simulation of Sudanese Sugar Cane Bagasse Gasification Process Using ASPEN PLUS","authors":"M. Mutaz, Ibrahim H.Elamin, Hamid M. Mustafa","doi":"10.54388/jkues.v1i1.8","DOIUrl":"https://doi.org/10.54388/jkues.v1i1.8","url":null,"abstract":"Bagasse has traditionally inefficiently burned in boilers for steam and electricity generation which still suffers from significant inefficiencies creating; therefore there is a need for alternative processes to be analyzed. Among the biomass utilization technologies, biomass gasification is an attractive solution for utilizing biomass effectively. In this study Aspen Plus simulation package V8 was used to develop a model for the gasification of Sudanese sugar cane bagasse in a fluidized bed reactor for syngas production. The developed model is based on Gibbs free energy minimization applying the non-stoichiometric equilibrium method for optimization of the gasifier performance. The objective is to study the effect of important operating parameters including gasification temperature, steam to biomass ratio (SBR) and air to biomass ratio (ABR), on syngas composition, low heating value (LHV) of syngas and cold gas efficiency (CGE). The optimal values of syngas composition, LHV and CGE were located at gasification temperature range from 750C to 950C, steam to biomass ratio around 0.5 to 0.8 and air to biomass ratio values equal to or below 0.4.","PeriodicalId":129247,"journal":{"name":"Journal of Karary University for Engineering and Science","volume":"77 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":"133739332","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: 4