Journal of University of Babylon for Engineering Sciences最新文献_第7页

Environmental Impact Assessment of Tehran- Karaj Highway by Using Plants Indicators 利用植物指标评价德黑兰-卡拉杰高速公路环境影响

Journal of University of Babylon for Engineering Sciences Pub Date : 2018-07-05 DOI: 10.29196/jubes.v26i7.1526

Mustafa Nur Istanbuly, B. Amiri, A. Hamidian

{"title":"Environmental Impact Assessment of Tehran- Karaj Highway by Using Plants Indicators","authors":"Mustafa Nur Istanbuly, B. Amiri, A. Hamidian","doi":"10.29196/jubes.v26i7.1526","DOIUrl":"https://doi.org/10.29196/jubes.v26i7.1526","url":null,"abstract":"Lead pollution is one of the negative impacts of roads on environment, which can be assessed using environmental impact assessment. As a study case, Tehran- Karaj highway was selected for studying environmental lead pollution in pine tree needles (plants indicators). Samples were collected from seven stations and five distances (0, 10, 20, 50, 100 meter). The results showed that transport has a direct effect on lead pollution in trees. The differences in lead concentrations were significant for both stations and distances. The average lead concentration was 11.34 mg/Kg in the station close to Tehran, and 3.8 mg/Kg in the closest station to Karaj. This is because heavier transfer and higher density of cars in Tehran compared to Karaj. The average Pb concentrations in the stations besides the highway was 8.77 mg/Kg and decreased to 6.57 mg/kg in stations located in 100 meter away from the highway. While the average Pb concentration in station E was 1.53 mg/Kg, it was decreased constantly in all distances, due to tree coverage. A conclusion, the analytical method of roads environmental impact assessment can be used effectively for monitoring Pb pollution. The pollution can be decreased by using pine trees and emphasis on using windbreakers. ","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131677351","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

Numerical Investigation of Influence of Multi-Line Fuel Injection (Methane) on a Tubular Combustor Emissions of Micro Gas Turbine 多管路燃油喷射(甲烷)对微型燃气轮机管式燃烧室排放影响的数值研究

Journal of University of Babylon for Engineering Sciences Pub Date : 2018-07-05 DOI: 10.29196/JUBES.V26I7.1537

Arkan Khikhal Husain, Mahmood Attallah Mashkoor, Fuad Abdul Ameer Khalaf

{"title":"Numerical Investigation of Influence of Multi-Line Fuel Injection (Methane) on a Tubular Combustor Emissions of Micro Gas Turbine","authors":"Arkan Khikhal Husain, Mahmood Attallah Mashkoor, Fuad Abdul Ameer Khalaf","doi":"10.29196/JUBES.V26I7.1537","DOIUrl":"https://doi.org/10.29196/JUBES.V26I7.1537","url":null,"abstract":"This work presents a technique for design optimization of a gas turbine tubular combustor. This technique is based on the use of computational fluid dynamics (CFD) with CFX solver to reduce emission gases by using multi-line of fuel injection in secondary zone. This research relates the mass fraction of the multi-line of fuel injection as well as the equivalence ratio of the tubular combustion chamber designed for methane fuel. By using k-ε as turbulent model and Probability Density Function (PDF) Flamelet as combustion model. The operating casing data of micro size gas turbine are used, the validation of fuel flow mixing and combustion analyses were carried out with a focus on species concentration in the combustor outlet section. With variant fuel mass flow rate fraction in fuel lines (F2/F1), It was found that, with the new design NO reduced about 56% for the mass fraction 3 in high equivalence ratio and about 30%for the mass fraction 1 for a low equivalence ratio, while reduction in outlet temperature profile (pattern factor) is about 45% → 35%.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116918941","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

Estimation of Dispersion Phenomena for Selected Sites in Babylon Governorate 巴比伦省选定地点分散现象的估计

Journal of University of Babylon for Engineering Sciences Pub Date : 2018-07-03 DOI: 10.29196/JUBES.V26I7.1491

A. Abed

{"title":"Estimation of Dispersion Phenomena for Selected Sites in Babylon Governorate","authors":"A. Abed","doi":"10.29196/JUBES.V26I7.1491","DOIUrl":"https://doi.org/10.29196/JUBES.V26I7.1491","url":null,"abstract":"This investigation is conducted to estimate the dispersion phenomena for selected sites in Babylon governorate (ALkheder – Almossiab, ALsadda, ALbunafaa, ALhashmia,). \u0000The main aim of this investigation is to study dispersion phenomena, and identification and classification of soils to (high, intermediate, and non-dispersion) depending on special test methods in dispersion phenomena. The experimental tests that were done; indexes, physical, and chemical tests to natural soils and special tests were done to the identification and classification of dispersion soils. \u0000The results of crumb test showed weak dispersion (Grade 2) for AL sadda soil, but the soils of ((ALkhezer – Almossaab, AL.bunafaa, AL.hashmia) showed intermediate dispersion (Grade 3). \u0000The results of the double hydrometer test showed that ALkheder – Al.mossaab, and ALbunafaa were of intermediate dispersion soils, and for AL.hashmia, and AL sadda soils were non – dispersive. \u0000The results of slacking test indicated that (ALkheder - Almossaab, ALbunafeej) were dispersive soils and (AL.hashmia, ALsadda soils) were non– dispersive. \u0000While the results of soluble salts in pore water test indicated that all soils were non–dispersive but with different ratios according to its position in zone B of the classification chart.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134266159","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 and Numerical Study to Enhance of Heat Transfer Coefficient in Air Flow Using Microchannel 利用微通道提高气流换热系数的实验与数值研究

Journal of University of Babylon for Engineering Sciences Pub Date : 2018-07-03 DOI: 10.29196/JUBES.V26I7.1492

Jalal M. Jalil, G. A. Aziz, Amjed A. Kadhim

引用次数: 0

Evaluation and Improvement of Roundabouts in CBD Area at Al-Hilla City Al-Hilla市CBD环形交叉口评价与改进

Journal of University of Babylon for Engineering Sciences Pub Date : 2018-07-02 DOI: 10.29196/jubes.v26i7.1488

A. N. Abbood, Aboothar Abdul Hussein Hamzah Al-Tufail

{"title":"Evaluation and Improvement of Roundabouts in CBD Area at Al-Hilla City","authors":"A. N. Abbood, Aboothar Abdul Hussein Hamzah Al-Tufail","doi":"10.29196/jubes.v26i7.1488","DOIUrl":"https://doi.org/10.29196/jubes.v26i7.1488","url":null,"abstract":"In the present-day, congestion considers one of the biggest problems experienced by urban areas. This congestion led to form the conflicting movements at intersections, merging, roundabouts, etc. The objective of this study is to investigate the traffic congestion problem at the two selected roundabouts at CBD area in Hilla city. Roundabouts consider safer than the conventional intersections, but it has less capacity than corresponding intersections. In Iraq, several roundabouts were built in the last decade to improve the traffic performance. However, most of these roundabouts are unable to accommodate the rapid growth in traffic volumes and suffer from a serious issue in congestion. Therefore, this study aims to evaluate these roundabouts. The VISSIM simulation software has been used to perform the evaluation analysis for these selected roundabouts. Then, field data have been collected by using two video cameras that installed by using a fabricated equipment. The process of collecting data has lasted for 8 hours at each roundabout. And then, this field data has been used to calibrate the simulation model (VISSIM). After making the required calibration and validation for the simulation model, the developed model was depended to perform the evaluation and find the suitable solution to solve the traffic congestion at these roundabouts.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121942070","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

Effect of Cutting Conditions and Cooling Fluid on the Surface Roughness of AA2024 in Turning Process 切削条件和冷却液对AA2024车削加工表面粗糙度的影响

Journal of University of Babylon for Engineering Sciences Pub Date : 2018-07-02 DOI: 10.29196/jubes.v26i7.1489

Wafa Mahdi Jodia

引用次数: 0

Effect of Combined Stresses on Fiber- Epoxy Composite Curved Pipe 复合应力对纤维-环氧复合弯曲管的影响

Journal of University of Babylon for Engineering Sciences Pub Date : 2018-07-01 DOI: 10.29196/JUBES.V26I7.1486

F. A. Abdullah, Omar Emad Shukry

{"title":"Effect of Combined Stresses on Fiber- Epoxy Composite Curved Pipe","authors":"F. A. Abdullah, Omar Emad Shukry","doi":"10.29196/JUBES.V26I7.1486","DOIUrl":"https://doi.org/10.29196/JUBES.V26I7.1486","url":null,"abstract":"The aim of this research is to study the behavior of fiber epoxy composite curve pipe under internal pressure and bending moment. The specimens made from woven roving (Mat) fiber glass pipes and epoxy composite with 50% volume fraction are used to manufacturing curved pipe. The experimental work included manufacturing pipe specimens by vacuum bag technique. Pipe specimens were having 100mm inner diameter, 450 mm length of curvature center line of curve pipe with (43 degree) and two wall thickness are 4 and 3 mm. The test rig was designed and performed to study the effect of internal pressure and bending moment on the composite pipes. Also, the tensile test of the samples was done. The analytical expression solution has been accomplished to determine the strain, stress, for hoop and longitudinal direction. It is evident that the hoop stress for woven roving fiber composite pipe was more than longitudinal stress by almost (14%). The maximum internal pressure in the case of internal pressure only was more than compared to the combined internal pressure with bending moment by almost (115%). The most dangerous region is found in the inner arc of the curved pipe (intrude) area.","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"271 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123291703","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 Study of a Diesel Engine Performance Fueled with Different Types of Nano-Fuel. 不同类型纳米燃料对柴油机性能的影响。

Journal of University of Babylon for Engineering Sciences Pub Date : 2018-07-01 DOI: 10.29196/JUBES.V26I7.1485

A. Nassir, H. Shahad

{"title":"Experimental Study of a Diesel Engine Performance Fueled with Different Types of Nano-Fuel.","authors":"A. Nassir, H. Shahad","doi":"10.29196/JUBES.V26I7.1485","DOIUrl":"https://doi.org/10.29196/JUBES.V26I7.1485","url":null,"abstract":"The aim of this experimental work is to study the effect of nanoparticles added to diesel fuel on engine performance characteristic. Nano fuels are prepared by adding Al2O3 or TiO2, both with particle size less than 45nm of diesel fuel. Four doses of each type namely (25, 50, 100 and 150) ppm are prepared. These nanoparticles are blended with diesel fuel in varying volume fraction by the means of an electric mixer and an ultrasonicator. The Nano fuels are (DF+Al2O3) and (DF+TiO2). Physicochemical properties of nano fuels are measured and compared with these of neat diesel. The study shows that the addition of nanoparticles to diesel fuel improves its physical properties such as cetane number, thermal conductivity and viscosity. The influence of nanoparticles addition is very clear on the engine performance. The results show that the performance parameters are improved for example, brake thermal efficiency is increased from 19.4% for diesel to 21% and 25% for DF+Al2O3 and DF+TiO2 respectively, the brake specific fuel consumption (BSFC) is decreased by 8% and 20% for DF+Al2O3 and DF+TiO2 respectively, the brake specific energy consumption (BSFC) is decreased by 8% and 20% for DF+Al2O3 and DF+TiO2 respectively at 25ppm and 75% load. The exhaust gas temperature is 382°C for pure diesel while it is 417°C for DF+Al2O3 and 353°C for DF+TiO2. The peak pressure for pure diesel is 62 bar and it increases with DF+Al2O3 to 66.2 bar as for DF+TiO2 the peak pressure decreases to 57.2 bar at full load and 150ppm. ","PeriodicalId":311103,"journal":{"name":"Journal of University of Babylon for Engineering Sciences","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133805380","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

A Review for the Current Advancements in 5G Technology 5G技术发展现状综述

Journal of University of Babylon for Engineering Sciences Pub Date : 2018-06-29 DOI: 10.29196/JUBES.V26I7.1481

Ahmed NajahJabbar, I. Murdas

引用次数: 0