Results in Engineering最新文献

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The effects of graphene oxide nanoparticles on the mechanical and thermal properties of polyurethane/polycaprolactone nanocomposites; a molecular dynamics approach 氧化石墨烯纳米颗粒对聚氨酯/聚己内酯纳米复合材料机械性能和热性能的影响;一种分子动力学方法
IF 6
Results in Engineering Pub Date : 2024-09-19 DOI: 10.1016/j.rineng.2024.102933
Shapour Fadaei Heydari, Mohamad Shahgholi, Arash Karimipour, Mehdi Salehi, Seyed Ali Galehdari
{"title":"The effects of graphene oxide nanoparticles on the mechanical and thermal properties of polyurethane/polycaprolactone nanocomposites; a molecular dynamics approach","authors":"Shapour Fadaei Heydari,&nbsp;Mohamad Shahgholi,&nbsp;Arash Karimipour,&nbsp;Mehdi Salehi,&nbsp;Seyed Ali Galehdari","doi":"10.1016/j.rineng.2024.102933","DOIUrl":"10.1016/j.rineng.2024.102933","url":null,"abstract":"<div><div>Using molecular dynamics simulations using LAMMPS and other tools, this work examined the effect of graphene oxide nanoparticles on the mechanical and thermal properties (TPs) of polyurethane/polycaprolactone nanocomposites. The simulations examined the atomic, MP, and thermodynamic properties of atomic structures while examining and equilibrating them. After 10 ns of equilibration at 300 K and 1 bar, samples were convergent and the simulation parameters were confirmed. The addition of GO-NPs significantly enhanced TPs and MPs, with optimal improvements observed at a 2 % concentration. Specifically, increasing GO-NP content from 0.5 % to 2 % resulted in increases in heat flux from 680.95 to 714.09 W/m<sup>2</sup>, thermal conductivity from 0.69 to 0.93 W/m·K, and Young's modulus from 5.91 to 6.63 MPa. This is while increasing GO-NP content from 0.5 % to 2 % resulted in decreases in both the mean square displacement and glass transition temperature (Temp) to 0.22 Å<sup>2</sup>and 318 K, respectively. However, further increasing the GO-NP concentration to 5 % led to a decrease in HF and TC, likely due to nanoparticle agglomeration, which also reduced mechanical strength and increased MSD and Tg. This study underscores the importance of optimizing GO-NP concentration, with 2 % identified as the most effective for enhancing the properties of PU/PCL/GO-NCs.</div></div>","PeriodicalId":36919,"journal":{"name":"Results in Engineering","volume":"24 ","pages":"Article 102933"},"PeriodicalIF":6.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590123024011885/pdfft?md5=31cc558ad2292c568ba5fa07fb44e27f&pid=1-s2.0-S2590123024011885-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A pythagorean fuzzy approach to evaluate the challenges to implementing circular economy in the glass manufacturing industry: Implications for sustainable development 用 pythagorean 模糊方法评估玻璃制造业实施循环经济所面临的挑战:对可持续发展的影响
IF 6
Results in Engineering Pub Date : 2024-09-19 DOI: 10.1016/j.rineng.2024.102911
Zulficar Niaz Tushar , Shah Murtoza Morshed , Afia Ahsan , Soumik Sarkar , A.B.M. Mainul Bari , Abu Reza Md Towfiqul Islam
{"title":"A pythagorean fuzzy approach to evaluate the challenges to implementing circular economy in the glass manufacturing industry: Implications for sustainable development","authors":"Zulficar Niaz Tushar ,&nbsp;Shah Murtoza Morshed ,&nbsp;Afia Ahsan ,&nbsp;Soumik Sarkar ,&nbsp;A.B.M. Mainul Bari ,&nbsp;Abu Reza Md Towfiqul Islam","doi":"10.1016/j.rineng.2024.102911","DOIUrl":"10.1016/j.rineng.2024.102911","url":null,"abstract":"<div><p>Glass is extensively used in both domestic and commercial settings and is recognized for its high recyclability and reusability. Organizations have been actively trying to adopt circular economy (CE) principles in various industrial sectors in recent years due to the increased global attention toward attaining sustainability. This study, therefore, proposes an integrated multi-criteria decision-making (MCDM) technique, combining the Pythagorean fuzzy (PF) theory with the decision-making trial and evaluation laboratory (DEMATEL) method to prioritize and analyze the interrelationships within the challenges affecting the adoption of CSC practices in the glass manufacturing industry in a growing economy like Bangladesh. The challenges were initially identified through a review of existing literature. Following expert validation, seventeen components were chosen for analysis using the PF-DEMATEL framework. The obtained results suggest that \"lack of consumer awareness and drive for circular practices\",\" inadequate regulatory framework for waste management and environmental protection\", and \" limited market demand for remanufactured products\" are the most important challenges affecting the adoption of CSC in the glass manufacturing industry with prominence value 7.872, 7.614, and 7.315, respectively. Furthermore, the primary contributing factor is the \"lack of consumer awareness and drive for circular practices\", followed by \"inadequate waste collection fleet\" and \"limited market demand for remanufactured products\", which have causal weights of 0.77, 0.464, and 0.353, respectively. The study's findings hold the prospect of assisting managers and policymakers in crafting long-term strategy and expenditure decisions aimed at enhancing sustainability and resilience in the glass manufacturing industry.</p></div>","PeriodicalId":36919,"journal":{"name":"Results in Engineering","volume":"24 ","pages":"Article 102911"},"PeriodicalIF":6.0,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590123024011666/pdfft?md5=53b6234e54d7146ae8fe7316c12c4399&pid=1-s2.0-S2590123024011666-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Channel flow dynamics of fractional viscoelastic nanofluids in molybdenum disulphide grease: A case study 二硫化钼润滑脂中分数粘弹性纳米流体的通道流动动力学:案例研究
IF 6
Results in Engineering Pub Date : 2024-09-18 DOI: 10.1016/j.rineng.2024.102872
Maria Javaid , Junaid N. Chauhdary , M. Yasar Javaid , Muhammad Farooq , Faisal Saleem , M. Imran , Ijaz Hussain , M. Sultan , M. Imran Khan , Mohammad Ilyas Khan , Mohammad Rehan , Fahid Riaz
{"title":"Channel flow dynamics of fractional viscoelastic nanofluids in molybdenum disulphide grease: A case study","authors":"Maria Javaid ,&nbsp;Junaid N. Chauhdary ,&nbsp;M. Yasar Javaid ,&nbsp;Muhammad Farooq ,&nbsp;Faisal Saleem ,&nbsp;M. Imran ,&nbsp;Ijaz Hussain ,&nbsp;M. Sultan ,&nbsp;M. Imran Khan ,&nbsp;Mohammad Ilyas Khan ,&nbsp;Mohammad Rehan ,&nbsp;Fahid Riaz","doi":"10.1016/j.rineng.2024.102872","DOIUrl":"10.1016/j.rineng.2024.102872","url":null,"abstract":"<div><p>Nanoscopic fluids especially viscoelastic Nanofluids are very useful in engineering and industrial problems. This research is to determine the open channel flow of a viscoelastic nanofluid (namely Oldroyd-B (OBNF)). Oldroyd-B fluid (OBF) was used as the base fluid and molybdenum disulphide nanopatrials were added in the fluid to form desired OBNF. To convert the mathematical model to a fractional model from a classical order partial differential equation PDE, fractional type derivative named Caputo-Fabrizio (CF) was used. The main objective of this study is to find the exact mathematical solution for the temperature, concentration and velocity distributions by using integral transformation technique. Final results are discussed graphically for the influence of different parameters on calculated temperature, concentration and velocity. Skin friction of the said fluid and engineering related dimensionless numbers including Reynolds number (<em>Re</em>), Prandtl number (<em>Pr</em>), Grashof number (<em>Gr</em>) and Schmidt number (<em>Sc</em>) are also discussed. At the end a comparison is illustrated in graphical form between current studied fluid (i.e. OBNF), another non-Newtonian fluid (i.e. Maxwell Nanofluid (MWNF)) and Newtonian fluid. As we know speed of Newtonian fluid is greater than non-Newtonian fluid, the same statement is validated by our solution. It is also noted that adding molybdenum disulphide nanoparticles to grease, heat transmission increased to 19.11% and mass transmission decreased to 2.51%.</p></div>","PeriodicalId":36919,"journal":{"name":"Results in Engineering","volume":"24 ","pages":"Article 102872"},"PeriodicalIF":6.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590123024011277/pdfft?md5=59c5a30ca443f56e05e6b7cd5368075d&pid=1-s2.0-S2590123024011277-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study on compressive strength of bamboo (Guadua amplexifolia J. Presl) in San Jorge River basin, Colombia 哥伦比亚圣乔治河流域竹子(Guadua amplexifolia J. Presl)抗压强度研究
IF 6
Results in Engineering Pub Date : 2024-09-18 DOI: 10.1016/j.rineng.2024.102926
Yiniva Camargo Caicedo , Jorge Augusto Montoya Arango , Ricardo Acosta Acosta
{"title":"Study on compressive strength of bamboo (Guadua amplexifolia J. Presl) in San Jorge River basin, Colombia","authors":"Yiniva Camargo Caicedo ,&nbsp;Jorge Augusto Montoya Arango ,&nbsp;Ricardo Acosta Acosta","doi":"10.1016/j.rineng.2024.102926","DOIUrl":"10.1016/j.rineng.2024.102926","url":null,"abstract":"<div><p>Bamboo is a fast-growing plant commonly used to produce handicrafts, baskets, furniture, and other goods. <em>Guadua amplexifolia</em> J. Presl, a native woody bamboo species of Colombia, has been the subject of limited scientific research. This study conducted in the San Jorge River basin in Montelíbano (Córdoba) evaluated <em>Guadua amplexifolia</em> J. Presl's compressive strength to find its potential applications. Samples from four- and five-year-old bamboo culms were collected for analysis. The findings showed a positive correlation between the modulus of rupture and density. In contrast, the modulus of elasticity showed a weak positive correlation. It was seen that the predominant mode of compressive strength failure was type A (accounted for 66.7 %) in the samples tested. The mean value for the modulus of rupture was 43.1 x10<sup>−3</sup> MPa, and the mean modulus of elasticity value was 1075.5 x10<sup>−3</sup> MPa. Earlier studies reported lower calculated values for modulus of rupture and modulus of elasticity for <em>G. amplexifolia</em> J. Presl bamboo than other bamboo species.</p></div>","PeriodicalId":36919,"journal":{"name":"Results in Engineering","volume":"24 ","pages":"Article 102926"},"PeriodicalIF":6.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590123024011812/pdfft?md5=36f8ebfb38afede78116497e84a1924b&pid=1-s2.0-S2590123024011812-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A genetic algorithm approach for flexible power point tracking in partial shading conditions 部分遮光条件下灵活功率点跟踪的遗传算法方法
IF 6
Results in Engineering Pub Date : 2024-09-18 DOI: 10.1016/j.rineng.2024.102940
Hamid Ouatman, Nour-Eddine Boutammachte
{"title":"A genetic algorithm approach for flexible power point tracking in partial shading conditions","authors":"Hamid Ouatman,&nbsp;Nour-Eddine Boutammachte","doi":"10.1016/j.rineng.2024.102940","DOIUrl":"10.1016/j.rineng.2024.102940","url":null,"abstract":"<div><p>A novel Flexible Power Point Tracking (FPPT) algorithm based on Genetic Algorithms (GAs) is presented in this study. The algorithm is designed to effectively handle fluctuating solar irradiation levels and partial shading scenarios. The main objective is to enhance power output and tracking accuracy under dynamic environmental conditions, based on extensive simulations. The results showed superior performance for power output, tracking accuracy, and convergence speed than traditional techniques. Its adaptability to changing environmental conditions renders it suitable for real-time implementation, thereby contributing to efficient power generation in PV systems. Simulations demonstrate the efficacy of the algorithm in maximizing power extraction and meeting grid-code requirements under dynamic conditions. The comparative analyses underscore the superiority of the GA-based FPPT algorithm, highlighting its potential to significantly improve power point tracking in photovoltaic systems. This shows significance of adaptive algorithms in modern PV systems, particularly for reducing the effects of partial shading on energy yield. More research is required on the refinement of the algorithm's performance for long-term reliability and scalability in larger PV installations fostering advancements in photovoltaic power point tracking toward sustainable energy systems.</p></div>","PeriodicalId":36919,"journal":{"name":"Results in Engineering","volume":"24 ","pages":"Article 102940"},"PeriodicalIF":6.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590123024011952/pdfft?md5=4f9ea0227c24cf657988e1608bb7ab8b&pid=1-s2.0-S2590123024011952-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative investigation on heat transfer augmentation in a liquid cooling plate for rectangular Li-ion battery thermal management 用于矩形锂离子电池热管理的液体冷却板传热增强比较研究
IF 6
Results in Engineering Pub Date : 2024-09-18 DOI: 10.1016/j.rineng.2024.102913
Ammar Abdulhaleem Abdulqader, Hayder Mohammad Jaffal
{"title":"Comparative investigation on heat transfer augmentation in a liquid cooling plate for rectangular Li-ion battery thermal management","authors":"Ammar Abdulhaleem Abdulqader,&nbsp;Hayder Mohammad Jaffal","doi":"10.1016/j.rineng.2024.102913","DOIUrl":"10.1016/j.rineng.2024.102913","url":null,"abstract":"<div><p>This work conducted a numerical study with experimental validation to improve the performance of a rectangular multi-channel cooling plate utilised for cooling lithium batteries. Seven different designs on a cold plate for laminar flow conditions were evaluated using numerical modelling simulations in the 3D ANSYS program. Three cooling plate designs were proposed with channel arrangements: arc, convergent–divergent and different channel widths (narrow central channels and wide peripheral channels). The other four proposed cooling plate designs included representations of variable-sized pin fins with different shapes: oval, drop, rhombus and trapezoidal within different channel widths. Real experiments were conducted on a manufactured conventional cooling plate to verify the results of the numerical simulation. Results indicated that all proposed designs improved the heat transfer of the cooling plate. The percentage of enhancement in Nusselt number due to the presence of rhombus-shaped pin fins inside different channel widths is approximately 95.5 %, which is about three times the enhancement in pin fins that used only smooth different channel widths, which is approximately 33.5 %. Amongst the studied designs, incorporating different channel widths with the addition of rhombus-shaped pin fins exhibited the largest heat dissipation capacity and the best thermal–hydraulic performance. The highest temperature uniformity enhancement ratio and performance evaluation parameter for this case reached about 71.96 % and 1.68, respectively.</p></div>","PeriodicalId":36919,"journal":{"name":"Results in Engineering","volume":"24 ","pages":"Article 102913"},"PeriodicalIF":6.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259012302401168X/pdfft?md5=c012d579552f2487fa3bce94df9ae70e&pid=1-s2.0-S259012302401168X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142240849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A modified fluorescent probe protocol for evaluating the reactive oxygen species generation by metal and metal oxide nanoparticles in Gram-positive and Gram-negative organisms 用于评估金属和金属氧化物纳米粒子在革兰氏阳性和革兰氏阴性生物体内产生活性氧的改良荧光探针方案
IF 6
Results in Engineering Pub Date : 2024-09-18 DOI: 10.1016/j.rineng.2024.102925
Anmiya Peter , Jiya Jose , Sarita G. Bhat , Abhitha K
{"title":"A modified fluorescent probe protocol for evaluating the reactive oxygen species generation by metal and metal oxide nanoparticles in Gram-positive and Gram-negative organisms","authors":"Anmiya Peter ,&nbsp;Jiya Jose ,&nbsp;Sarita G. Bhat ,&nbsp;Abhitha K","doi":"10.1016/j.rineng.2024.102925","DOIUrl":"10.1016/j.rineng.2024.102925","url":null,"abstract":"<div><p>Nanomaterials have enormous potential for application, particularly in the health sector. It is imperative to find new methods to develop new antibacterial drugs that suppress bacterial-resistant infections and restrict the spread of dangerous infectious diseases. Some metal and metal oxide nanomaterials can generate reactive oxygen species (ROS) in bacterial cells that can prevent bacterial infections. ROS plays a role in both healthy and pathological cellular processes. These extremely reactive compounds include hydrogen peroxide, superoxide, singlet oxygen, and hydroxyl radical. Several fluorescent probes are very selective and specific for certain ROS, particularly for their detection. Furthermore, it is crucial to comprehend the mechanism of ROS generated by nanomaterials because ROS are involved in several cellular signalling pathways. This work portrays a modified protocol for detecting ROS production in Gram-positive and Gram-negative organisms using fluorescent probes. Here, we use Dichloroflurosceine diacetate (DCFDA) to glimpse ROS production. This probe is specifically used for the detection of ROS in cell lines. We modified the protocol for analysing intracellular ROS production in bacteria in the presence of different metal and metal oxide nanomaterials and the detection of photocatalyzed ROS generation from nanoparticles. Scanning electron microscopy (SEM) images confirm the ROS-mediated bacterial cell rupture.</p></div>","PeriodicalId":36919,"journal":{"name":"Results in Engineering","volume":"24 ","pages":"Article 102925"},"PeriodicalIF":6.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590123024011800/pdfft?md5=985ee1f6ae20bbfd4e828b52f9df42ed&pid=1-s2.0-S2590123024011800-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270932","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Thermal activation of basic oxygen furnace slag as a heterogeneous catalyst in transesterification: Characterization and catalytic activity studies 将碱性氧气炉渣热活化为酯交换反应中的异相催化剂:特性和催化活性研究
IF 6
Results in Engineering Pub Date : 2024-09-18 DOI: 10.1016/j.rineng.2024.102899
J.S. Ali, H.L. Rutto, T. Seodigeng, S.L. Kiambi
{"title":"Thermal activation of basic oxygen furnace slag as a heterogeneous catalyst in transesterification: Characterization and catalytic activity studies","authors":"J.S. Ali,&nbsp;H.L. Rutto,&nbsp;T. Seodigeng,&nbsp;S.L. Kiambi","doi":"10.1016/j.rineng.2024.102899","DOIUrl":"10.1016/j.rineng.2024.102899","url":null,"abstract":"<div><p>The valorization of industrial by-products has garnered significant attention in recent years due to its potential to enhance sustainability and economic efficiency within various sectors. Basic Oxygen Furnace slag (BOF-S), a by-product generated in the steelmaking process characterized by its complex composition, presents an opportunity for waste management and resource recovery. This study investigates the potential of BOF-S as a catalyst in converting waste cooking oil to biodiesel via the transesterification reaction. To improve its efficiency, BOF-S was calcined at 850 °C (BOF-S 850), and 1000 °C (BOF-S 1000), for 5 h. The BOF-S was characterized using XRF, N<sub>2</sub> sorption, XRD, TGA-DSC, SEM-EDS and FTIR. The characterization techniques showed that the BOF-S 850 had superior characteristics as a catalyst: rough surface, increased pore size and more active basic sites compared to the BOF-S and the BOF-S 1000 slag samples. The transesterification reaction was conducted at a methanol: oil ratio of 20:1, a catalyst loading of 20 wt %, a reaction time of 12 h, a reaction temperature of 60 °C, and a stirring speed of 750 rpm. The findings established that the BOF-S 850 was the best catalyst, with a 90.77 % biodiesel yield and was able to sustain a maximum of two transesterification cycle runs.</p></div>","PeriodicalId":36919,"journal":{"name":"Results in Engineering","volume":"24 ","pages":"Article 102899"},"PeriodicalIF":6.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259012302401154X/pdfft?md5=ae4f1d60df0bc172039e09ef44980357&pid=1-s2.0-S259012302401154X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142240706","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On the enhancement of acceptable blockage of open jet wind tunnel by employing modifications based on concepts of boundary layer and jet flow for testing of aero-rotors 根据边界层和喷射流的概念进行改进,提高开放式喷射风洞的可接受阻塞性,用于航空转子测试
IF 6
Results in Engineering Pub Date : 2024-09-18 DOI: 10.1016/j.rineng.2024.102934
Ath S. Singhal, S.V. Jain, R.N. Patel, Vatsal Parmar, Rohan Pathak
{"title":"On the enhancement of acceptable blockage of open jet wind tunnel by employing modifications based on concepts of boundary layer and jet flow for testing of aero-rotors","authors":"Ath S. Singhal,&nbsp;S.V. Jain,&nbsp;R.N. Patel,&nbsp;Vatsal Parmar,&nbsp;Rohan Pathak","doi":"10.1016/j.rineng.2024.102934","DOIUrl":"10.1016/j.rineng.2024.102934","url":null,"abstract":"<div><p>The conventional closed and open jet tunnels suffer from various adverse blockage effects that alter the flow conditions generating erroneous results when larger than allowable blockage models are tested. The maximum acceptable blockage is limited to 25 % for an open jet tunnel. The physics behind the inferior blockage capacity and their redressal is investigated. Hitherto, numerical models are developed to rectify the blockage troubles that introduce an additional complex case-based mathematical modeling to reckoning the results. In the current paper novel approach to redesigning the tunnel to solve blockage troubles is investigated that facilitates evading of mathematical techniques and securing accurate results straightforwardly. A hypothetical design incorporating the remedies is proposed, capable of conditioning the flow in a manner that debilitates the adverse effects of solid blockage, wake blockage, jet expansion, etc. The hypothesis is theoretically expounded by the boundary layer and jet flow phenomenon. The modified blower-type open jet wind tunnel constitutes a centrifugal blower, long inlet duct, plenum chamber around the test section, and collector. The modified wind tunnel is tested through experiments executed on four different-sized Savonius rotors creating 10 %, 30 %, 50 %, and 60 % blockage. The static pressure along the contours of the blades of rotors is obtained. The experimental results are juxtaposed with CFD results carried out at free-wind boundary conditions and standard classic experimental results performed in conventional wind tunnel at 11 % blockage. A blockage enhancement of 25 % is achieved by the approach of modification in the design of a conventional open jet wind tunnel.</p></div>","PeriodicalId":36919,"journal":{"name":"Results in Engineering","volume":"24 ","pages":"Article 102934"},"PeriodicalIF":6.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590123024011897/pdfft?md5=cd188252b34f963ec9f504bd002a1e16&pid=1-s2.0-S2590123024011897-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142270874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel catalyst based on zero-valent iron nanoparticles for assisting electro-fenton process applied to a toxic wastewater 基于零价铁纳米颗粒的新型催化剂,用于辅助有毒废水的电-芬顿工艺
IF 6
Results in Engineering Pub Date : 2024-09-18 DOI: 10.1016/j.rineng.2024.102938
Mohsen Mohammadi , Reza Davarnejad , Mika Sillanpää
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