Engineering Headway最新文献_第4页

Enhancement Thermal Transmission for Cross Flow Heat Exchanger by Using Triangular Fins Experimentally 使用三角鳍片增强横流式热交换器的热传递实验

Engineering Headway Pub Date : 2024-06-14 DOI: 10.4028/p-vtts3l

Shatha Ali Mardan, Z. K. Kadhim, Ali A. Alwan

引用次数: 0

An Investigation of the Design Mechanical Performance of Belleville Spring 贝勒维尔弹簧设计机械性能调查

Engineering Headway Pub Date : 2024-06-14 DOI: 10.4028/p-4dnkw0

Noor Alhuda Hayder Ali, Mohammed Ali Nasser, K. J. Jadee

{"title":"An Investigation of the Design Mechanical Performance of Belleville Spring","authors":"Noor Alhuda Hayder Ali, Mohammed Ali Nasser, K. J. Jadee","doi":"10.4028/p-4dnkw0","DOIUrl":"https://doi.org/10.4028/p-4dnkw0","url":null,"abstract":"A conical disc arranged in different stacks parallel, or series works as a compression spring used in different machine applications. This work focusing on presenting a comparison between theoretical calculation with experimental performance of single spring and their stacked. This comparison with cold stamping manufactured based on spring force and spring rate constant related with deflection. The spring design is chosen according to Belleville spring standard depending on sheet thickness of the selected material Carbon steel C55S-1/1204. Results experimental force for a single spring started high to about (0.2 mm) deflection, then reduced less than theoretical results, with a deviation (32.5 %). The parallel stacked of springs show, the force increased with increasing numbers of discs in spring stack, without clearly affecting deflection of stack in theoretical, but the experimental have (13.5%) variation for two springs and (14.6%) for three discs. While, the series stacked, show the spring deflection increased with increasing numbers of springs in the stack, without clearly affecting the spring force, with a variation of (38.5%) for two spring and (10%) for three discs. Finally, the spring rate increased with increasing deflection till reaching flatness, where the theoretical calculations show higher than the measured experimentally in about (31.5%).","PeriodicalId":512976,"journal":{"name":"Engineering Headway","volume":"26 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141343033","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 Numerical Assessment of the Belleville Spring Strength Behaviour 贝勒维尔弹簧强度行为的数值评估

Engineering Headway Pub Date : 2024-06-14 DOI: 10.4028/p-zr6rau

Noor Alhuda Hayder Ali, Mohammed Ali Nasser, K. J. Jadee

{"title":"A Numerical Assessment of the Belleville Spring Strength Behaviour","authors":"Noor Alhuda Hayder Ali, Mohammed Ali Nasser, K. J. Jadee","doi":"10.4028/p-zr6rau","DOIUrl":"https://doi.org/10.4028/p-zr6rau","url":null,"abstract":"This research presented a numerical assessment for a a selected theoretical design of single and stacked Belleville spring taken into consideration the strength behaviour. Theoretical and numerical analysis focused on two main factors which are the spring force and the variation of the stress at a specific locations across the spring section related to the deflection. This research chose the spring design dimensions according to the Belleville spring standard. The numerical simulation are done by employing ANSYS APDL 2018 software based on the same design and selected material properties. The comparison between the finding shows a good match with deviation less about, where the variation for a single spring being less than 10.9%, and the deviations being about 11.8% and 12.8% for two and three parallelly stacked discs. On the other hand, the divergence was approximately 12.4% and 12.2% for two and three discs stacked in series. The stress distribution results across the spring section shows at the final deflection of (1.15 mm), the maximum von Mises stress is concentrated at the upper surface of the inner hole of the spring, this stress is reduced in value when goes deeply through the thickness of the disc, till reach the minimum value at the middle section of the thickness.","PeriodicalId":512976,"journal":{"name":"Engineering Headway","volume":"30 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141341523","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 Study on Modifying Vortex Generators to Improve Thermal Performance in Single- and Two-Phase Flow in Circular Tubes 关于改进涡流发生器以提高圆管中单相和两相流热性能的综述研究

Engineering Headway Pub Date : 2024-06-14 DOI: 10.4028/p-1mvdhb

F. Alnasur, Riyadh S. Al-Turaihi

{"title":"A Review Study on Modifying Vortex Generators to Improve Thermal Performance in Single- and Two-Phase Flow in Circular Tubes","authors":"F. Alnasur, Riyadh S. Al-Turaihi","doi":"10.4028/p-1mvdhb","DOIUrl":"https://doi.org/10.4028/p-1mvdhb","url":null,"abstract":"The literature about various modifications to the vortex generators as passive techniques and some combined techniques was discussed numerically and experimentally. In general, all vortex generators have a good coefficient of thermal performance compared to a plain tube. Most vortex generators don’t consume any amount of energy to perform their function, so can be considered a good tool to enhance the thermal performance coefficient in industrial applications, but they have the disadvantage of high pressure drop. When using vortex generators in two phase flow accelerated the process of transition between phases pattern in addition to increasing heat transfer. The inserted twisted tapes have a low pressure drop and good heat transfer efficiency, resulting in a thermal performance factor of 1.6.In addition, the easier to manufacture where can be changed in size and shape in proportion to the place of use inside the tubes also having a low cost, and do not consume any amount of energy to perform its function, the hybrid methods can be used with it, such as a twisted tape with nonfluids, which had proven effective in thermal performance coefficients, but their disadvantages include the high cost and risk of dealing with these materials ,bubble injectors can also be used, despite the fact that they require energy to operate. So, the twisted tapes inserted can be considered a best tool to be used in enhancing the thermal performance coefficient in various Industrial fields.Based on the reviewed literature, it was determined that the following research is limited and could garner more attention in the future: multiple coaxial cross-twisted tapes with different perforations, and twisted tapes with variable cross-section, typical twisted tapes with regular wavy edge, hybrid methods such as nanofluids and twisted tape can be used in multiphase flow.","PeriodicalId":512976,"journal":{"name":"Engineering Headway","volume":"22 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141338734","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

Effect of Split and Timing Injection Techniques on Diesel-Biodiesel Blends Fueled RCCI Engines 分注和定时喷射技术对以柴油-生物柴油混合物为燃料的 RCCI 发动机的影响

Engineering Headway Pub Date : 2024-06-14 DOI: 10.4028/p-4xcnx1

N. K. F. Al-Abboodi, Alaa R. Al-Badri, Ali A. Abdulsaeed

{"title":"Effect of Split and Timing Injection Techniques on Diesel-Biodiesel Blends Fueled RCCI Engines","authors":"N. K. F. Al-Abboodi, Alaa R. Al-Badri, Ali A. Abdulsaeed","doi":"10.4028/p-4xcnx1","DOIUrl":"https://doi.org/10.4028/p-4xcnx1","url":null,"abstract":"On reactivity-controlled compression ignition engines, numerical simulations approach were conducted to study the combined effect of the 2nd pulse fraction and dwell time on combustion and emissions characteristics powered by the diesel-biodiesel blends. The Diesel-RK commercial software carried out the simulation the engine was chosen. Meanwhile, the fuel is directly injected through engine cylinder, four stroke, and single cylinder. Simulations were conducted with different dwell times between start of injections of the 1st and 2nd pulses, while the start of injections times of 1st pulse keeping at -40o CA ATDC. Besides, the fuel fraction ratio of the 2nd pulse was changed at 90, 80,70, and 70%, accordingly. In this current study, the peak cylinder pressure and peak cylinder temperature were compared at various boundary conditions. The extracted results extracted from simulation showed that, in contrast to the dwell time 5o CA, a slightly reduction in peak cylinder pressure by 8.9, 7.8, 6.7, and 9.1% for 10, 15. 20, 25o CA respectively. Peak cylinder temperature showed identical trend, its decreased by 9.0, 6.8, 7.8, and 8.8% . Moreover, the results showed that by decreased fuel fraction ratio from 90 to 60%, the peak cylinder pressure increased by 10.1%, while peak cylinder temperature decreased by 7.9%. As a result of the current study, and based on the results of the experimental work published in the literature, it has been consistently demonstrated that the predictive numerical model is reliable..","PeriodicalId":512976,"journal":{"name":"Engineering Headway","volume":"57 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141338765","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

Machine Building and Energy: New Concepts and Technologies (2nd MBENCT) 机械制造与能源：新概念与新技术（第 2 届 MBENCT）

Engineering Headway Pub Date : 2024-04-18 DOI: 10.4028/b-jncup1

Subhan Namazov, Nizami Yusubov, Sylvio Simon

引用次数: 0

Time Series Analysis on Covid-19 Cases in Malaysia and Thailand 马来西亚和泰国 Covid-19 病例的时间序列分析

Engineering Headway Pub Date : 2024-04-16 DOI: 10.4028/p-5nfqeo

Koh Ee Xinne, Sabariah Binti Saharan

{"title":"Time Series Analysis on Covid-19 Cases in Malaysia and Thailand","authors":"Koh Ee Xinne, Sabariah Binti Saharan","doi":"10.4028/p-5nfqeo","DOIUrl":"https://doi.org/10.4028/p-5nfqeo","url":null,"abstract":"The 2019 Coronavirus Disease (COVID-19), also known as the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), is a highly contagious illness. The first Malaysia COVID-19 case was discovered on January 25, 2020, while Thailand reported their first confirmed case on January 13, 2020. In this research, the main objectives are to identify and forecast the trend of COVID-19 confirmed cases and death cases in Malaysia and Thailand by using the simple exponential smoothing method and Holt’s linear trend method. This research used 365 data of daily COVID-19 confirmed cases and death cases for Malaysia and Thailand. The results showed that Thailand recorded a higher accuracy with MAPE value of 10.41% in terms of daily confirmed cases by using a simple exponential smoothing method and the same findings applied to daily death cases, with Thailand accounted for 25.89% of MAPE. Meanwhile, by using Holt's linear trend method, Thailand achieved a higher accuracy of MAPE (16.77%) in terms of daily confirmed cases and the same conclusions held true for daily death cases, with Thailand accounting for 25.00% of MAPE. However, the simple exponential smoothing method outperformed Holt's linear trend method when forecasting daily confirmed cases, while Holt's linear trend method outperformed it when forecasting daily death cases.","PeriodicalId":512976,"journal":{"name":"Engineering Headway","volume":"27 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140697113","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

Applying Visualization and Analysis Data to Investigate Cyber Crimes (Case: Web Defacement) 应用可视化和分析数据调查网络犯罪（案例：网页污损）

Engineering Headway Pub Date : 2024-04-16 DOI: 10.4028/p-9jbcba

Mandahadi Kusuma, Dedy Hariyadi, Indah Daila Sari

引用次数: 0

The Effect of Adding Variations in Glycerol Concentration from Used Cooking Oil on the Physical Properties of Edible Film Made from Potato Starch 添加不同的废食用油甘油浓度对马铃薯淀粉制成的食用薄膜的物理性质的影响

Engineering Headway Pub Date : 2024-04-16 DOI: 10.4028/p-1mh50n

Mutiara Eka Permata, E. Sedyadi, Dodi Irwanto, Karmanto Karmanto

{"title":"The Effect of Adding Variations in Glycerol Concentration from Used Cooking Oil on the Physical Properties of Edible Film Made from Potato Starch","authors":"Mutiara Eka Permata, E. Sedyadi, Dodi Irwanto, Karmanto Karmanto","doi":"10.4028/p-1mh50n","DOIUrl":"https://doi.org/10.4028/p-1mh50n","url":null,"abstract":"Making edible films from potato starch by adding glycerol from used cooking oil with various concentrations of 10, 20 and 30% (v/w starch). This study aims to determine the physical properties of edible films made using these materials and the effect of adding variations in glycerol concentration on the physical properties of the resulting edible films. The physical property tests carried out included thickness, tensile strength, elongation and WVTR (Water Vapor Transmission Rate) tests as well as to see the effect using the pearson correlation test on SPSS version 25. The physical properties of edible film made from potato starch raw materials with the addition of variations in glycerol concentration produced successive thicknesses respectively 0.0670; 0.0674 and 0.0818 mm. Tensile strength respectively 24.237; 14.929 and 3.417 N/m2. Consecutive elongation 2.4064; 5.6768 and 20.096 %. As well as WVTR 5.05556 respectively; 6.38426 and 8.36574. The addition of variations in glycerol concentration to the physical properties of the edible film showed that the addition of glycerol did not significantly affect the thickness, but greatly affected the tensile strength, elongation and WVTR of the resulting edible film.","PeriodicalId":512976,"journal":{"name":"Engineering Headway","volume":"23 35","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140697406","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

Identification of Disease in Tomato Plants Based on Image: Systematic Literature Review 基于图像识别番茄植株的病害：系统文献综述

Engineering Headway Pub Date : 2024-04-16 DOI: 10.4028/p-oan0u7

Ejah Said Mansur, Mahmud Rizal Mustopa, Ricky Habibullah, Shofwatul Uyun

引用次数: 0