Mechanical Engineering Advances最新文献

Prelithiation of electrodes in lithium-ion capacitors: A review 锂离子电容器电极的预层析：综述

Mechanical Engineering Advances Pub Date : 2024-07-17 DOI: 10.59400/mea.v2i2.1223

Aston Sam D’Silva, M. P. Eldho, K. Lekha, J. Anushree, Vinayambika S. Bhat, Raghavendra Sagar

引用次数: 0

The main distinguishing characteristic of active vibration control 主动振动控制的主要特点

Mechanical Engineering Advances Pub Date : 2024-04-18 DOI: 10.59400/mea.v2i1.1140

Z. Ghemari, S. Belkhiri

引用次数: 0

Low carbon integrated vehicles and buildings 低碳综合车辆和建筑

Mechanical Engineering Advances Pub Date : 2024-02-05 DOI: 10.59400/mea.v2i1.282

Kevin Kendall

引用次数: 0

Low carbon integrated vehicles and buildings 低碳综合车辆和建筑

Mechanical Engineering Advances Pub Date : 2024-02-05 DOI: 10.59400/mea.v2i1.282

Kevin Kendall

引用次数: 0

Mechanical properties of polypyrrole/SnO2 nanocomposites and its LPG sensing application 聚吡咯/二氧化锰纳米复合材料的机械特性及其在液化石油气传感中的应用

Mechanical Engineering Advances Pub Date : 2023-12-15 DOI: 10.59400/mea.v1i1.258

Md Shakeel Ahmed, A. Parveen, Sriram Manjunath

引用次数: 0

Thermal and viscous irreversibilities in the heat exchanger of individually finned heat pipes using freon R404A as the working fluid 使用氟利昂 R404A 作为工作流体的独立翅片热管热交换器中的热不可逆性和粘不可逆性

Mechanical Engineering Advances Pub Date : 2023-10-18 DOI: 10.59400/mea.v1i1.132

Élcio Nogueira

{"title":"Thermal and viscous irreversibilities in the heat exchanger of individually finned heat pipes using freon R404A as the working fluid","authors":"Élcio Nogueira","doi":"10.59400/mea.v1i1.132","DOIUrl":"https://doi.org/10.59400/mea.v1i1.132","url":null,"abstract":"This work aims to apply a theoretical procedure to determine the performance of the heat exchanger of individually finned heat pipes used in an air conditioning system. The relevant physical quantities are defined and specified locally in the evaporator and condenser sections. The results obtained in the sections are associated with the theoretical determination of the global performance of the heat exchanger. Global theoretical results are compared with global experimental results. Thermal effectiveness, heat transfer rate, pressure drop, thermal and viscous irreversibilities, and thermodynamic Bejan number are determined at the evaporator, condenser, and heat exchanger. The relevant variables used to determine the results are the number of fins per heat pipe and rows of heat pipes. The theoretical-experimental comparison demonstrates that the localized model applied in the analysis is consistent and can be used as a design and comprehensive analysis tool for finned heat exchangers. The performance of the heat exchanger demonstrated exceptional when comparing irreversibilities through the Bejan number, indicating a favorable cost-benefit ratio for the fins less than 30 and the number of heat pipes equal to 49. Bejan’s thermodynamic number, which uses results related to thermal and viscous irreversibilities, demonstrated that one should look for the relationship between thermal irreversibility versus total irreversibility and that fin numbers between 10 and 20 for heat pipes equal to 49 provide a better cost-benefit ratio. The absolute percentage errors obtained between theoretical and experimental values, for an experimental number of fins equal to 30, for the overall heat transfer rate and overall thermal effectiveness range from 2.0% to 42.1%.","PeriodicalId":509420,"journal":{"name":"Mechanical Engineering Advances","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139317081","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

Turbine vibration condition monitoring in region 3 第 3 地区涡轮机振动状态监测

Mechanical Engineering Advances Pub Date : 2023-10-18 DOI: 10.59400/mea.v1i1.219

Seyed Ali Mousavi, Mohammad Taghipour

引用次数: 0

Multigrid method for the solution of thermal elastohydrodynamic lubrication point contact problem with surface asperities 多网格法求解带表面粗糙度的热弹性流体动力润滑点接触问题

Mechanical Engineering Advances Pub Date : 2023-10-15 DOI: 10.59400/mea.v1i1.94

V. Awati, Parashuram M. Obannavar, Mahesh Kumar Nanjaiah

{"title":"Multigrid method for the solution of thermal elastohydrodynamic lubrication point contact problem with surface asperities","authors":"V. Awati, Parashuram M. Obannavar, Mahesh Kumar Nanjaiah","doi":"10.59400/mea.v1i1.94","DOIUrl":"https://doi.org/10.59400/mea.v1i1.94","url":null,"abstract":"The paper presents, the numerical investigation of point contact thermal elasto-hydrodynamic lubrication (EHL) with surface asperities are analyzed. The effect of temperature and surface roughness on fluid film thickness is studied in detail. The governing equations comprises Reynolds, film thickness, load balance and energy equations with appropriate boundary conditions. The second order finite difference approximation is used to discretize the governing equations and the resultant nonlinear system of algebraic equations is solved using Multigrid V-cycle with full approximation scheme (FAS) technique. Multi level multi integration (MLMI) technique is employed to solve the film thickness equation. The obtained results are illustrated in the form of graphs and tables which are comparable with earlier findings. The film thickness profiles shows dimple near to the outlet region due to temperature-viscosity wedge mechanism. Isothermal minimum film thickness is higher than the thermal minimum film thickness. Minimum film thickness is much smaller due to slide to roll ratio is positive ascompared to negative, whereas the behavior of central film thickness is contrast as that of minimum film thickness.","PeriodicalId":509420,"journal":{"name":"Mechanical Engineering Advances","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139319133","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

Analysing entropy generation of MHD (50:50) slip flow over an inclined needle 分析倾斜针上 MHD（50:50）滑移流的熵产生

Mechanical Engineering Advances Pub Date : 2023-09-19 DOI: 10.59400/mea.v1i1.106

Selvaraj Priya, Gundada Raju Rajamani, Bhose Ganga, Abdul Kaffoor Abdul Hakeem, Pachiyappan Ragupathi

{"title":"Analysing entropy generation of MHD (50:50) slip flow over an inclined needle","authors":"Selvaraj Priya, Gundada Raju Rajamani, Bhose Ganga, Abdul Kaffoor Abdul Hakeem, Pachiyappan Ragupathi","doi":"10.59400/mea.v1i1.106","DOIUrl":"https://doi.org/10.59400/mea.v1i1.106","url":null,"abstract":"The primary objective of this study is to quantify the rate of entropy generation within the Magnetohydrodynamic (MHD) slip flow system over the inclined needle. Entropy generation is a measure of the irreversibility and inefficiency in the flow process. The slip flow condition at the fluid interface can significantly impact the flow characteristics and heat transfer rates. In the hybrid nanofluid flow, which consists of non-magnetic and magnetic (Al2O3 and Fe3O4) are nanoparticles, are considered as the base fluid. Furthermore, the effects of inclined magnetic fields are taken into interpretation. The PDE’s governing equations are converted into ODE’s using similarity transformations and solved by a numerical technique based on BVP4C. The results illustrate that crucial parameter such as the magnetic parameter, mixed convection parameter, nanoparticles of solid volume fractions, and Prandtl numbers are pointedly impacted by momentum and thermal profiles. The entropy and Bejan number also consider being various relationship combined parameters. These analyses protest that raising the magnetic parameter estates an increase in the hybrid nanofluid thermal profile under slip circumstances. Examined magnetic field impact on flow and entropy generation in MHD flows, revealing significant changes in entropy generation due to interaction between magnetic field and nanoparticles. This analysis understands the impact of MHD and slip effects on entropy generation, particularly in the context of the newly emerging 50:50 fluid mixture. Hybrid nanofluids have been shown to have improved thermal conductivity compared to traditional fluids, which can enhance the cooling or heating capabilities of the inclined needle.","PeriodicalId":509420,"journal":{"name":"Mechanical Engineering Advances","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139338867","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

Analysis of spiral plate heat exchanger used to cool vegetable oil with nanofluid consisting of water and non-spherical boehmite alumina nanoparticles 利用由水和非球形沸石氧化铝纳米颗粒组成的纳米流体冷却植物油的螺旋板热交换器分析

Mechanical Engineering Advances Pub Date : 2023-09-06 DOI: 10.59400/mea.v1i1.67

Élcio Nogueira

引用次数: 0