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Advances in Thermal Systems最新文献

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Experimental Study for the Effect of the Modified Twisted Tape Insert on Heat Transfer Through Circular Tube 改进型扭带插片对圆管传热影响的实验研究
Advances in Thermal Systems Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101281
Y. B. Patil, J.P. Shete
{"title":"Experimental Study for the Effect of the Modified Twisted Tape Insert on Heat Transfer Through Circular Tube","authors":"Y. B. Patil, J.P. Shete","doi":"10.2139/ssrn.3101281","DOIUrl":"https://doi.org/10.2139/ssrn.3101281","url":null,"abstract":"This work presents an experimental study on the mean Nusselt number, friction factor and enhancement efficiency characteristics in a circular tube. This was investigated for four twist ratios (Y= 2.3, 2.9, 3.5, and 4.1) The obtained results show that the mean Nusselt number and the mean friction factor in the tube with Plain, Perforated, perforated with notch type twisted tapes inserts increase with decreasing twist ratios (Y). Subsequently, an empirical correlation also was formulated to match with experimental results with ±4.22% variation for the Nusselt number and 5.59% for the friction factor. Also, the experimental results show higher values of heat transfer for perforated with notch type insert for higher values of Re. And shows lower values of friction factor for higher values of Re. Maximum F is observed for the insert with perforation with notch having Y=2.3. The average F increases 5 to 7 times than that of the plain tube and the heat transfer enhancement ranges from 2.9 to 3.3 times that of the plain tube over the range of Re 10000 to 16000 with air as working fluid.","PeriodicalId":277472,"journal":{"name":"Advances in Thermal Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127197387","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
Validation of Stress Concentration Factor and Estimation of Local Stresses Beyond Yield Point of the Material for Notched Specimens 缺口试样应力集中系数的验证及屈服点外局部应力的估计
Advances in Thermal Systems Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101362
Vinayak H. Khatawate, M. Dharap, R. Moorthy
{"title":"Validation of Stress Concentration Factor and Estimation of Local Stresses Beyond Yield Point of the Material for Notched Specimens","authors":"Vinayak H. Khatawate, M. Dharap, R. Moorthy","doi":"10.2139/ssrn.3101362","DOIUrl":"https://doi.org/10.2139/ssrn.3101362","url":null,"abstract":"In this paper, estimation of stresses at the notch root is reported for the three notched specimens using finite element analysis (FEA). Linear FEA is performed on the notches to evaluate stress concentration factor (Kt) and validated using Roark’s formulae. For the three specimens, nonlinear finite element analysis (NLFEA) is performed to evaluate local plastic stresses at the notch root and compared using notch stress strain conversion (NSSC) rules viz., Neuber’s rule and Equivalent strain energy density (ESED) approach. It is found that Neuber’s rule predicts better results of plastic stresses for flat specimens, whereas ESED predicts better results for cylindrical specimen.","PeriodicalId":277472,"journal":{"name":"Advances in Thermal Systems","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117016585","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
Flow Study of Synthetic Jet: A Review 合成射流的流动研究进展
Advances in Thermal Systems Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101301
Arundhati S. Ambole, M. Chaudhari
{"title":"Flow Study of Synthetic Jet: A Review","authors":"Arundhati S. Ambole, M. Chaudhari","doi":"10.2139/ssrn.3101301","DOIUrl":"https://doi.org/10.2139/ssrn.3101301","url":null,"abstract":"Synthetic jet is an immersing technology; it has proved very effective for cooling purpose. Synthetic jet has been looking as one of the challenging technology which can replace almost all traditional electronic cooling system very effectively. Huge amount of work has been done yet and still in progress to understand the flow of synthetic jet and to improve its performance. The review of experimental and computational study has been discussed. The experimental study consists of the formation and evolution with different stages in flow field. Also, it includes the parametric study of synthetic jet; in which effect of most of the geometric and operational parameters on the performance of the synthetic jet has studied. The computational study using commercial software’s has been explained in this paper. It has been observed that the flow characteristics of synthetic jet are different in the near field as compared to continuous jet.","PeriodicalId":277472,"journal":{"name":"Advances in Thermal Systems","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114527413","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
Development of Optimum Blade Pitching Software for Horizontal Axis Wind Turbine 水平轴风力机最佳桨叶俯仰软件的开发
Advances in Thermal Systems Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3102082
R. Jobanputra, S. Gopal
{"title":"Development of Optimum Blade Pitching Software for Horizontal Axis Wind Turbine","authors":"R. Jobanputra, S. Gopal","doi":"10.2139/ssrn.3102082","DOIUrl":"https://doi.org/10.2139/ssrn.3102082","url":null,"abstract":"The work demonstrates the development of a software for the operation of variable speed wind turbines with pitch control. Pitch control software will allow the wind turbine to capture Optimum energy in the real-time conditions. When the velocity of the wind is low to medium the turbine will be allowed to capture maximum amount of energy by pitching the blades at optimum angles, which will obtain maximum co-efficient of power. If the wind speed increases such that the power captured by the rotor approaches the rated power capacity, then the pitch of the blade would be controlled to maintain the desired power by decreasing the aerodynamic efficiency. This is possible by pitching the blades to feather such that it will generate the desired output power. At higher wind speed the wind turbine can be controlled by pitching the blade to feather i.e. to shed some power by pitching the blades to operate at lower power coefficient. The method of pitching to feather to control the aerodynamic power P captured will also be implemented.","PeriodicalId":277472,"journal":{"name":"Advances in Thermal Systems","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125844840","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
Thermohydraulic Performance Enhancement Using a Novel Combined V-Shaped Bluff Body Configuration 利用新型组合v形钝体结构提高热液性能
Advances in Thermal Systems Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101318
S. Bhattacharyya, R. S. Bhowmik, Satyajit Das, S. Show
{"title":"Thermohydraulic Performance Enhancement Using a Novel Combined V-Shaped Bluff Body Configuration","authors":"S. Bhattacharyya, R. S. Bhowmik, Satyajit Das, S. Show","doi":"10.2139/ssrn.3101318","DOIUrl":"https://doi.org/10.2139/ssrn.3101318","url":null,"abstract":"Heat transfer in a duct in presence of V-shape bluff body configuration has been experimentally examined in the turbulent flow regime up to the Reynolds number of 100000. This work presents a wide experimental study on novel combined V-shaped bluff body configuration in a plain duct at different positions. Isothermal pressure drop tests and heat transfer experiments under uniform heat flux conditions have been carried out. The Reynolds number ranges from 100-100000. The results indicate that in presence of V-shaped bluff body, heat transfer in the duct is increased by around 5%-15%. The increase in heat transfer is related to the eddy formation downstream of the V-shaped bluff body. Heat transfer augmentation and friction loss increased with combined effect of V-shaped bluff body configuration. Experimental results indicate that the use of V-shaped bluff body the duct can prominently increase the heat transfer performance.","PeriodicalId":277472,"journal":{"name":"Advances in Thermal Systems","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128451468","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 Measurement of Erosive Wear and Development of Prediction Model Using Adaptive Nero Fuzzy Inference System 侵蚀磨损试验测量及自适应Nero模糊推理系统预测模型的建立
Advances in Thermal Systems Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101690
M. Patil, S. D. Kalpande, S. Shekhawat, E. R. Deore, Chandrashekhar D. Mohod
{"title":"Experimental Measurement of Erosive Wear and Development of Prediction Model Using Adaptive Nero Fuzzy Inference System","authors":"M. Patil, S. D. Kalpande, S. Shekhawat, E. R. Deore, Chandrashekhar D. Mohod","doi":"10.2139/ssrn.3101690","DOIUrl":"https://doi.org/10.2139/ssrn.3101690","url":null,"abstract":"An investigation has been made to predict the erosion wear of slurry. Experimental setup was developed and experiments were conducted with slurry erosion tester. Based on results of experimentation regression model was developed results of this and experimental results were then compared with prediction model developed with adaptive Nero Fuzzy Inference System. It is observed that the regression model has an error of 25%. However with ANFIS prediction model wear prediction error was reduced to about 6%.","PeriodicalId":277472,"journal":{"name":"Advances in Thermal Systems","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131493828","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
Design Optimization and Manufacturing of Quadcopter Using 3D Printing 基于3D打印的四轴飞行器设计优化与制造
Advances in Thermal Systems Pub Date : 2017-12-21 DOI: 10.2139/ssrn.3101401
M. K. Satra, S. Shetty
{"title":"Design Optimization and Manufacturing of Quadcopter Using 3D Printing","authors":"M. K. Satra, S. Shetty","doi":"10.2139/ssrn.3101401","DOIUrl":"https://doi.org/10.2139/ssrn.3101401","url":null,"abstract":"In the past few years aerial vehicles have become extensively popular especially rotary winged vehicles like the quadcopters. In this paper, we discuss an approach we used to optimize the design a Quadcopter and to formulate appropriate design solutions for the problem of designing a customized quadcopter using 3D printing technology. Two approaches for designing a customized quadcopter frame are discussed, a Hybrid frame developed from a carbon fiber tubes and 3D printed parts and a pure 3D printed frame. A comparison of the two approaches has been discussed by highlighting the weight and the efficiency parameters. Frame parts are designed using mechanical simulation softwares like Autodesk Inventor and SolidWorks and static analysis was carried out using ANSYS Workbench.","PeriodicalId":277472,"journal":{"name":"Advances in Thermal Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123697455","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
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