Al-Qadisiyah Journal for Engineering Sciences最新文献_第2页

Investigation of heat transfer characteristics of Al2O3-water nanofluid in a coiled agitated vessel across varied operating conditions 不同操作条件下al2o3 -水纳米流体在螺旋搅拌容器中的传热特性研究

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-09-01 DOI: 10.30772/qjes.2023.178993

Uday M. Basheer Al-Naib

{"title":"Investigation of heat transfer characteristics of Al2O3-water nanofluid in a coiled agitated vessel across varied operating conditions","authors":"Uday M. Basheer Al-Naib","doi":"10.30772/qjes.2023.178993","DOIUrl":"https://doi.org/10.30772/qjes.2023.178993","url":null,"abstract":"This study aimed to investigate the heat transfer behavior of an Al 2 O 3 -water nanofluid within a coil-agitated tank. The experiment utilized Al 2 O 3 -water nanofluids with varying volume concentrations, namely 0.2 vol%, 0.3 vol%, and 0.4 vol%. Two different cooling water flow rates, specifically 1.8 and 2.2 liters/min, were employed during the investigation. The propeller speed ranged from 2 to 12 (rps), and the temperature spanned from 30 to 80 °C. The findings revealed that the heat transfer coefficient of the nanofluids exceeded that of the base water. Moreover, it increased with higher volume concentrations, reaching its peak at 0.4 vol% with an average rise of approximately ±77.2%. Additionally, the heat transfer coefficient demonstrated an increase of about ±19.8% when the temperature was elevated to 80 °C and approximately ±11.9% when the propeller speed was raised to 12 rps. Comparing the two distinct flow rates, it was observed that the heat transfer coefficient rose with decreasing flow rate to 1.8 liters per minute, exhibiting an average enhancement of approximately ±13.6%.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129086261","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

Investigation on aerodynamic performance of H-type darrieus vertical axis wind turbine with different series airfoil shapes 不同串联翼型h型达瑞乌斯垂直轴风力机气动性能研究

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-06-30 DOI: 10.30772/qjes.v16i2.881

Sivan Arif, Iyd Maree

{"title":"Investigation on aerodynamic performance of H-type darrieus vertical axis wind turbine with different series airfoil shapes","authors":"Sivan Arif, Iyd Maree","doi":"10.30772/qjes.v16i2.881","DOIUrl":"https://doi.org/10.30772/qjes.v16i2.881","url":null,"abstract":"Wind energy is one of the most important renewable energies since it reduces environmental pollution. Darrieus VAWTs with straight-bladed are more prevalent in small-scale power generation due to their simple blade design and easy construction. The investigation of the performance of VAWTs is a topic that is fascinating for Researchers to look into. Researchers have paid special attention to the Double Multiple Stream Tube (DMST) model for VAWT simulation because of the good correlation between the DMST model and the experimental results. In this paper Double Multiple Stream Tube analysis using Matlab programing to predict the aerodynamic performance of H-type Darrieus fixed pitch VAWT, More specifically, the power coefficient (Cp) and the tip speed ratio (TSR). The fact that an H-type Darrieus rotor has poor self-starting despite having a good power coefficient which is a constant worry at low wind speeds. Selection of the airfoil is one of the most essential factors to take into account while trying to enhancement the aerodynamic performance of H-type Darrieus fixed pitch VAWT. In this study first, results from experiments were used for the validation of the model, and then, 4 different families of symmetrical airfoils compared. The results indicate that the symmetrical airfoil S-1046 showed exceptional aerodynamic performance and a high starting torque for a low wind speed of 4m/s.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"42 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114042397","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 review on earth tube heat exchanger in heating and cooling systems 地管换热器在供热和制冷系统中的研究进展

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-06-30 DOI: 10.30772/qjes.v16i2.847

Doaa Hussain, M. Kassim

引用次数: 0

Aerodynamic lift coefficient prediction of supercritical airfoils at transonic flow regime using convolutional neural networks (CNNs) and multi-layer perceptions (MLPs) 基于卷积神经网络(cnn)和多层感知(mlp)的超临界翼型跨声速气流升力系数预测

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-06-30 DOI: 10.30772/qjes.v16i2.955

O. Olayemi, Oluwadolapo Salako, Abdulbaqi Jinadu, A. Obalalu, Benjamin Anyaegbuna

{"title":"Aerodynamic lift coefficient prediction of supercritical airfoils at transonic flow regime using convolutional neural networks (CNNs) and multi-layer perceptions (MLPs)","authors":"O. Olayemi, Oluwadolapo Salako, Abdulbaqi Jinadu, A. Obalalu, Benjamin Anyaegbuna","doi":"10.30772/qjes.v16i2.955","DOIUrl":"https://doi.org/10.30772/qjes.v16i2.955","url":null,"abstract":"Designing an aircraft involves a lot of stages, however, airfoil selection remains one of the most crucial aspects of the design process. The type of airfoil chosen determines the lift on the aircraft wing and the drag on the aircraft fuselage. When a potential airfoil is identified, one of the first steps in deciding its optimality for the aircraft design requirements is to obtain its aerodynamic lift and drag coefficients. In the early stages of trying to select a candidate airfoil, which a whole part of the design process rests on, the conventional method for acquiring the aerodynamic coefficients is through Computational Fluid Dynamics Simulations (CFDs). However, CFD simulation is usually a computationally expensive, memory-demanding, and time-consuming iterative process; to circumvent this challenge, a data-driven model is proposed for the prediction of the lift coefficient of an airfoil in a transonic flow regime. Convolutional Neural Networks (CNNs) and Multi-Layer Perceptrons (MLPs) were used to develop a suitable model which can learn a set of usable patterns from an aerodynamic data corpus for the prediction of the lift coefficients of airfoils. Findings from the training revealed that the models (MLPs and CNNs) were able to accurately predict the lift coefficients of the airfoil.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134647422","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 scientometric study and a bibliometric review of the literature on the design and construction of semi-flexible pavement 半柔性路面设计与施工的科学计量学研究与文献计量学综述

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-06-30 DOI: 10.30772/qjes.v16i2.921

R. Ali, B. Al-Humeidawi

{"title":"A scientometric study and a bibliometric review of the literature on the design and construction of semi-flexible pavement","authors":"R. Ali, B. Al-Humeidawi","doi":"10.30772/qjes.v16i2.921","DOIUrl":"https://doi.org/10.30772/qjes.v16i2.921","url":null,"abstract":"In last years, a new type of pavement has gained popularity, this type is called Semi-Flexible Pavement (SFP). It consists of porous asphalt with high air voids between (25-35) % filled with cementitious grout materials. This type of pavement substance offers substantial advantages over both common types of pavements (concrete and flexible) such as good resistance to rutting and durability. SFP is considered an alternative pavement to exceed the drawbacks that occur for both flexible and concrete pavements. SFP has good features against permanent deformation, oil spillage, and fatigue resistance. Previous studies have shown that it can be used in a variety of applications such as highways, motorways, bridge deck pavement, tunnels, industrial areas with industrial equipment traffic, airport aprons, and stations. The goal of this research is to identify and compile the most significant research papers using the Web of Science (WOS), analyze the data using the VOS viewer software, as well as learn which countries and institutions had published the most articles relating to the subject of cementitious grout material as it relates to semi-flexible. It was also done to learn more about the authors and their collaboration. In addition to knowing the keywords that will aid researchers in their research on this topic, using these studies to better understand the elements that affect how well semi-flexible mixtures and grouts perform such as porous asphalt Mixture gradation and grout material components.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130928903","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

Two parametric SEE transformation and its applications in solving differential equations 两参数SEE变换及其在求解微分方程中的应用

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-06-30 DOI: 10.30772/qjes.v16i2.891

Ali Moazzam, Emad A. Kuffi, Zain Ul Abideen, Ayza Anjum

引用次数: 1

The types of spatial adaptability based on user preferences of low-income apartments in erbil city 基于用户偏好的埃尔比勒低收入公寓空间适应性类型

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-06-30 DOI: 10.30772/qjes.v16i2.932

Arazu Hamad, Husein Husein

{"title":"The types of spatial adaptability based on user preferences of low-income apartments in erbil city","authors":"Arazu Hamad, Husein Husein","doi":"10.30772/qjes.v16i2.932","DOIUrl":"https://doi.org/10.30772/qjes.v16i2.932","url":null,"abstract":"Spatial adaptability is the ability of floor plans to adapt to families' changing needs and requirements over time. Apartment floor plans that are not designed according to the user's preferences cannot meet his or her changing needs over time. So, an adaptable apartment floor plan is considered a desirable alternative that can provide various solutions to households' changing spatial needs in the present and the future. Future low-income apartment designs will be more effective if users select the most appropriate types of floor plan adaptability for their needs and culture. The aim of this study is to identify user preferences for the types of adaptability of floor plans and assess the adaptability capacity of low-income apartment floor plans based on those preferences. Based on the research criteria, six low-income multi-family residential buildings in Erbil City were chosen as case studies. The questionnaire was conducted through face-to-face interviews with 363 participants. The study used mixed methodologies, including a quantitative questionnaire survey and a qualitative case study analysis method, to answer the research questions. This study concluded that users did not prefer all the types of spatial adaptability; they preferred the ones that most suited their needs, lifestyles, and preferences. Low-income apartment floor plans didn’t support user preferences, and residents of low-income apartments in Erbil City could not adapt their apartment floor plans according to their preferences. According to the findings of this study, there should be a greater emphasis on the future design of low-income apartment floor plans in order to meet the changing space needs and requirements of families. This study can help architects and policymakers improve housing quality in Erbil City by considering user preferences for space adaptation when designing low-income apartment floor plans in the future.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124543721","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

Parameters estimation of non-saturated permanent magnet synchronous machines by aid of statistical analysis 基于统计分析的非饱和永磁同步电机参数估计

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-06-30 DOI: 10.30772/qjes.v16i2.877

Mazen Al-Ibraheemi, F. Anayi, M. Neamah, Zainb Hassan

引用次数: 0

Influence of Cutting Parameter on Scarface Quality in Dry Turning of Different Materials 切削参数对不同材料干式车削表面质量的影响

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-06-30 DOI: 10.30772/qjes.v16i2.850

Z. Mohsein, Ahmed Abdulwahhab, D. Noori

{"title":"Influence of Cutting Parameter on Scarface Quality in Dry Turning of Different Materials","authors":"Z. Mohsein, Ahmed Abdulwahhab, D. Noori","doi":"10.30772/qjes.v16i2.850","DOIUrl":"https://doi.org/10.30772/qjes.v16i2.850","url":null,"abstract":"In machining operations, surface roughness (Ra) is an essential measure of product quality. It is determined by the cutting settings. The parameters that have been worked on are the Feed (F) (0.72, 0.88, 0.96, 1.12 mm/min), depth of cut (DOC) (0.5mm), and spindle speed (N) (545, 710, 1000, 1400 r.p.m). Three types of ferrous metals were employed in this study low-carbon steel St 3, medium-carbon steel St 45, and high-carbon steel Y8. According to the data, the optimal operating condition for obtaining the best surface roughness is 1.119 µm for low-carbon steel. St 3 from the product is by employing the following cutting settings for the cutter (feed 0.72 = mm/rev), (DOC= 0.5mm), and (machine speed =1400 rpm). But when using the cutting variables (feed 1.12 = mm/rev), (DOC = 0.5mm), and (machine speed = 545 rpm) for high-carbon steel Y8, gives the highest surface roughness is 4.999 µm . The experimental findings indicate that the surface roughness of turned components is considerably affected by cutting settings and machine equipment. According to the results of this study, increasing spindle speed lowered the Ra of the turned components, but rising feed increased the surface roughness. The value acquired by this approach will benefit other researchers for future work on tool vibrations, cutting forces, and so on.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127678886","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

Density, load and fly ash effect on stabilization of high plasticity soil with lime 密度、荷载和粉煤灰对石灰稳定高塑性土的影响

Al-Qadisiyah Journal for Engineering Sciences Pub Date : 2023-06-30 DOI: 10.30772/qjes.v16i2.925

S. Nugroho, S. Wardani, A. Muntohar

{"title":"Density, load and fly ash effect on stabilization of high plasticity soil with lime","authors":"S. Nugroho, S. Wardani, A. Muntohar","doi":"10.30772/qjes.v16i2.925","DOIUrl":"https://doi.org/10.30772/qjes.v16i2.925","url":null,"abstract":"The reuse recycling materials or industrial waste materials with aims to reduce pollution and environmental pollution, strongly supports concept of green building. Fly Ash is result of combustion pulverized system coal at the PLTU Tenayan, is no longer included in the B3 waste category. The usage of Fly Ash usage as building material, mine restoration, roads in this decade, is to replace cement or lime. The fly ash composition is mixed with lime for sub-base, will applied on high plasticity soils. A fix-mixture of soil and lime 5%, mixed with fly ash up to 30% of the mixture. The samples test was made at Optimum Moisture Content, with density values around Maximum Dry Density i.e. under compacted (under MDD) and over compacted (above MDD). Consolidated testing was performed with and without curing. Changes of load are represented by load increment ratio (LIR). The selected LIR value is 1.0; 1,5; and 2.0. The results showed that the higher of density, the volume of void is lower. The soil compression index value is the same for all density values, if the soil structure has not destroyed. or fatigue yet. In samples with crushed/broken soil structures, the value of the compressibility index decreased sharply. Curing successfully decreased the void ratio and compressibility of the soil. The strength of fly ash will decrease when reacting with water, so if soil burdened, the void ratio decreases drastically. The formation of strong molecular bonds between Fly ash and lime takes time. So, the compressibility value of the sample by curing 28 days is better than without curing. The composition levels between fly ash and lime also affects the compressibility index of the mixture. The optimum combination occurs in samples with a fly ash content of 25%.","PeriodicalId":227530,"journal":{"name":"Al-Qadisiyah Journal for Engineering Sciences","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130546861","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