Advanced Science, Engineering and Medicine最新文献_第3页

Stabilization of Maglev Plant Through Feedback Controller 基于反馈控制器的磁悬浮装置镇定

Advanced Science, Engineering and Medicine Pub Date : 2020-12-01 DOI: 10.1166/asem.2020.2587

Arpan Gupta, D. Sharma, S. Ghoshal

引用次数: 0

Indication of Mesopic Effectiveness in Light Emitting Diode (LED)-Based Lighting System 发光二极管(LED)照明系统中介观效能的表征

Advanced Science, Engineering and Medicine Pub Date : 2020-12-01 DOI: 10.1166/asem.2020.2717

Shikha Kasera, Harish Kumar

引用次数: 0

Harnessing Energy from Wind Induced Vibrating Structures 利用风振结构产生的能量

Advanced Science, Engineering and Medicine Pub Date : 2020-12-01 DOI: 10.1166/asem.2020.2601

Mrunal Bhalerao, Pooja Pangavhane, Ruchi Thosare, D. Pande

{"title":"Harnessing Energy from Wind Induced Vibrating Structures","authors":"Mrunal Bhalerao, Pooja Pangavhane, Ruchi Thosare, D. Pande","doi":"10.1166/asem.2020.2601","DOIUrl":"https://doi.org/10.1166/asem.2020.2601","url":null,"abstract":"This paper focuses on the harnessing of energy from fluid induced vibrations of bluff bodies due to the phenomenon of vortex shedding. Vortex shedding causes oscillating drag and lift forces due to which the bluff body in question experiences transient forces causing it to vibrate.\u0000 An experiment has been conducted to investigate the potential of such vibrations and its probable usefulness. Maximum achievable efficiency of the system has been calculated and techniques to convert this mechanical energy into electrical energy have been discussed. In this experiment the\u0000 bluff body used is a simple circular cylinder. The model developed works on the phenomenon of vortex shedding and resonance. The innovation of the setup is that the natural frequency of the structure can be easily altered by changing the relative distance between two of the mounting springs\u0000 or by simply using springs of a different stiffness, as a result it can be ensured that the natural frequency of oscillation of the structure is always nearly matched to the frequency of vortex shedding for a wide range of wind velocities thereby ensuring a near resonance condition always.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84625763","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

Performance Evaluation of Diesel Engine Using Novel Variable Compression Ratio Mechanism 采用新型变压缩比机构的柴油机性能评价

Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2608

A. J. Chaudhari, Dnyaneshwar Panchal, Shankar Kolekar, Swapnil Kadav, Harshal Moradiya, V. D. Patel

{"title":"Performance Evaluation of Diesel Engine Using Novel Variable Compression Ratio Mechanism","authors":"A. J. Chaudhari, Dnyaneshwar Panchal, Shankar Kolekar, Swapnil Kadav, Harshal Moradiya, V. D. Patel","doi":"10.1166/asem.2020.2608","DOIUrl":"https://doi.org/10.1166/asem.2020.2608","url":null,"abstract":"Increasingly stringent emission and fuel economy standards brings opportunities and research in automobile engine technology development to make it more efficient and less polluting. There are various performance improvement strategies adopted by different researchers in order to get\u0000 maximum power from the minimum quantity of fuel alongside substantial reduction in exhaust gas emission. The techniques such as CRDI (Common Rail Direct Injection), VVT (Variable valve timing) and such more are commercially viable and successfully incorporated in vehicles. Along the similar\u0000 track, this paper highlights the importance of variable compression ratio diesel engine, method of achieving the variable compression ratio (VCR) as per load and speed conditions. Variable compression ratio (VCR) technology is one of the method for improving the automobile engine performance,\u0000 efficiency, fuel economy with reduced emission for range of fuels. The basis of the VCR engine is to operate at different compression ratio, by altering the combustion chamber volume, as per need of most suitable operating conditions. Apart from this, the fuel injection location needs to be\u0000 varied as per load and speed conditions. The synchronization of both VCR and variable fuel injector location (VFIL) becomes important. Knowing this fact, the study for the diesel Comet engine (3.7 kW@2100 RPM) is undertaken for variable clearance volume accompanied with VIPL. The work consists\u0000 of design and development of mechanism consisting of auxiliary cylinder and auxiliary piston which will operate in and out of combustion chamber as per load and speed conditions. The detailed drawings and complete experimentation will be carried out to judge the improvement of performance\u0000 of diesel engine with modification of variable clearance volume concept. The performance parameters consist of brake power, brake thermal efficiency and brake specific fuel consumption under various load conditions.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76847642","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 Validation of In-Cylinder Combustion Analysis of DI Diesel Engine 直喷柴油机缸内燃烧分析的实验与数值验证

Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2591

S. Gugulothu, M. Sinha

{"title":"Experimental and Numerical Validation of In-Cylinder Combustion Analysis of DI Diesel Engine","authors":"S. Gugulothu, M. Sinha","doi":"10.1166/asem.2020.2591","DOIUrl":"https://doi.org/10.1166/asem.2020.2591","url":null,"abstract":"The major factors affecting the process of combustion in a single cylinder diesel engine is in-cylinder fluid flow characteristics. Better fuel-air mixing and combustion rates in diesel engine are primarily enhanced by the fluid flow. The fluid flow prior to combustion process in DI\u0000 diesel engines travel through induction process and further gets improvised during the compression process. Therefore, it is compulsory to understand the fluid flow motion inside the cylinder in designing the different bowl-in-piston geometries with the most appropriate operating and emission\u0000 characteristics. A better spatial distribution is required for the injected fuel throughout the entire space of combustion geometry in DI diesel engine, to obtain a better combustion with lesser emission. In order to effectively make use of gas flows it is mandatory to match the piston bowl\u0000 geometry with fuel spray characteristics. For obtaining better combustion, matching of combustion chamber geometry, fuel injection and gas flows plays prominent role. But it is evident that piston bowl geometry plays a significant role on flow of compressed air when piston moves from BDC to\u0000 TDC i.e., before the start of combustion, resulting in proper mixing, better vaporization and atomization of fluid particles. When compared with other combustion chambers, Off-set bowl in the absence of central projection with sharp edges provide higher swirl number. Higher these whirl number\u0000 lesser will be the soot emission at the expense of higher NOx level.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77907264","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

Micro Electrical Discharge Machining of Micro-Hole 微孔微细电火花加工

Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2586

R. Porwal, V. Yadava, J. Ramkumar

{"title":"Micro Electrical Discharge Machining of Micro-Hole","authors":"R. Porwal, V. Yadava, J. Ramkumar","doi":"10.1166/asem.2020.2586","DOIUrl":"https://doi.org/10.1166/asem.2020.2586","url":null,"abstract":"Advancements in micro-fabrication are characterized by a progressive miniaturization leading towards higher integration. The fabrication of particular size micro hole in difficile to machine engineering materials is one of the most challenging tasks in manufacturing industry. Since\u0000 micro holes are prepared in the end product therefore the rejection of product due to poor hole quality is not acceptable in modern manufacturing industries. Micro electrical discharge machining has become one of the most promising methods for creating micro features or micro components of\u0000 any electrical conducting engineering materials in spite of its hardness. The material extraction mechanism in micro electrical discharge machining is due to plasma creation, heat deportation, superheating of both the electrodes and expulsion of material is in the form of debris particles\u0000 by dielectric fluid during pulse-off time. The micro feature such as micro hole created by micro electrical discharge machining process is useful in industries ranging from automobile to biomedical. In order to improve process efficiency researchers across the globe worked on micro electrical\u0000 discharge machining Setup development, micro electrical discharge machining of different materials and shapes in general and hole making in particular, and also analyzes different factor that affect process performance. Present paper summarizes research work carried out related to experimentation,\u0000 modeling and optimization of sinking and drilling micro electrical discharge machining of different materials.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78461052","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

Evolution of a Modular Limbless Crawling and Climbing Robot 模块化无肢爬行爬行机器人的进化

Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2590

Meet Patel, Asesh Patra, P. Chattopadhyay, A. Majumder, S. Ghoshal

引用次数: 1

Structural Response of Multi-Layered Aluminium Foam Core Sandwich Structure Against Blast Loading 多层泡沫铝芯夹层结构对爆炸荷载的结构响应

Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2604

Manjeet Gupta, G. Tiwari

{"title":"Structural Response of Multi-Layered Aluminium Foam Core Sandwich Structure Against Blast Loading","authors":"Manjeet Gupta, G. Tiwari","doi":"10.1166/asem.2020.2604","DOIUrl":"https://doi.org/10.1166/asem.2020.2604","url":null,"abstract":"In the present study, three dimensional finite element analysis were carried out to know the structural response of the sandwich panels having closed cell Aluminium foam cored material against blast loading. The foam cored material were used in the form of layers of different Relative\u0000 Density (R.D.) 6%, 10%, and 16% whereas the material for top and bottom face plate was considered as Aluminium Alloy (AA2024 T3) and Rolled Homogeneous Armour (RHA) steel respectively. The thickness of face plate was kept as 3 mm and total equivalent thickness of core material was considered\u0000 as 50 mm and the length and breadth of the sandwich panel is 500 mm × 500 mm. The sandwich panel subjected to blast load equivalent to 700 gm. TNT at a stand-off distance of 350 mm from the front plate along the centerline of the panel. The numerical investigation was carried out through\u0000 LS-DYNA software with varying charge mass, stand-off distance, individual layer thicknesses by keeping total core thickness constant and results were validated through the findings available in the literature and found close to each other. The influence of relative density, Stand-Off Distance\u0000 (SOD), individual foam layer and mass of charge was explored. Results show that the various layers of foam with different densities improve the blast resistance of panel compared to panel with single layer of foam with uniform density.","PeriodicalId":7213,"journal":{"name":"Advanced Science, Engineering and Medicine","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83045266","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

Application of Computational Fluid Dynamics in MQL (Minimum Quantity Lubrication) Machining 计算流体动力学在最小量润滑加工中的应用

Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2694

Payal Chauhan, Anjali Gupta, A. Thakur

引用次数: 0

Reverse Engineering in Medical-Bio Modeling and Bioengineering 医学生物建模和生物工程中的逆向工程

Advanced Science, Engineering and Medicine Pub Date : 2020-11-01 DOI: 10.1166/asem.2020.2593

K. Satyam, Richa Pandey

引用次数: 0