International journal of engineering. Transactions A: basics最新文献_第3页

Predicting Force in Single Point Incremental Forming by Using Artificial Neural Network 基于人工神经网络的单点增量成形力预测

International journal of engineering. Transactions A: basics Pub Date : 2017-11-30 DOI: 10.5829/ije.2018.31.01a.13

M. Oraon, Vinay Sharma

引用次数: 22

An Experimental Study of Nanofluids Operated Shell and Tube Heat Exchanger with Air Bubble Injection 气泡注入纳米流体管壳式换热器的实验研究

International journal of engineering. Transactions A: basics Pub Date : 2017-11-30 DOI: 10.5829/ije.2018.31.01a.19

G. Thakur, Gurpreet Singh, M. Thakur, S. Kajla

{"title":"An Experimental Study of Nanofluids Operated Shell and Tube Heat Exchanger with Air Bubble Injection","authors":"G. Thakur, Gurpreet Singh, M. Thakur, S. Kajla","doi":"10.5829/ije.2018.31.01a.19","DOIUrl":"https://doi.org/10.5829/ije.2018.31.01a.19","url":null,"abstract":"Shell and Tube heat exchangers are the heat exchangers that are most widely used in industries and for other commercial purposes. There are many techniques that have been utilized to enhance the heat transfer performance of the shell and tube heat exchangers. Air bubble injection is one of the promising and inexpensive techniques that can create turbulence in the fluids resulting in to enhancement of heat transfer characteristics of the shell and tube heat exchangers. In this paper, experimental study of heat transfer characteristics have been done by injecting air bubbles at tube inlet and throughout the tube for 0.1%v/v and 0.2%v/v Al2O3 nanoparticle concentration. Results obtained at two different injection points for both concentrations are compared with the case when no air bubble injection is done. The results showed the enhancement in the heat transfer characteristics with air bubble injection and volumetric concentration of nanoparticles. The maximum enhancement was found to be in the case where air bubbles are injected throughout the tube which is followed by the air bubble injection at the tube inlet and without air bubble injection. As the bubbles were injected throughout the tube, approximately 22-33% enhancement was observed. The overall heat transfer coefficient with injecting air bubbles throughout the tube showed an enhancement of about 12-23% and 14-25% for 0.1% and 0.2% of nanofluids.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126117148","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: 6

Economic-statistical Design of NP Control Chart with Variable Sample Size and Sampling Interval 变样本量和抽样间隔的NP控制图的经济统计设计

International journal of engineering. Transactions A: basics Pub Date : 2017-10-12 DOI: 10.5829/ije.2018.31.04a.15

M. Fallahnezhad, M. Shojaie-Navokh, Y. Zaremehrjerdi

{"title":"Economic-statistical Design of NP Control Chart with Variable Sample Size and Sampling Interval","authors":"M. Fallahnezhad, M. Shojaie-Navokh, Y. Zaremehrjerdi","doi":"10.5829/ije.2018.31.04a.15","DOIUrl":"https://doi.org/10.5829/ije.2018.31.04a.15","url":null,"abstract":"The control charts are graphical tools and proven techniques to improve the performance of a process. Usually, the processes are not naturally controlled, so the use of control charts will help to reduce the variability and increase the stability of the process. In the traditional approach, control charts with fix sample size and constant sampling intervals were used to identify the changes in the process. While, control charts can be examined from different statistical and economical directions using different sampling schemes for achieving a better result. In past studies, it has been shown that np control charts show better results in detecting shifts by using variable sampling schemes but it is also important to consider how the cost of using variable sampling schemes will be, since the cost of a process depends on the parameters of the control chart. In this paper, the economic-statistical design of np control chart with variable sample size and sampling interval (VSSI) is formulated and then we compare and analyze the resulted obtained with other schemes. Results show significant improvement in terms of economic and statistical performance.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131152311","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: 5

Application of Multivariate Control Charts for Condition Based Maintenance 多变量控制图在状态维修中的应用

International journal of engineering. Transactions A: basics Pub Date : 2017-10-12 DOI: 10.5829/ije.2018.31.04a

Hassan Rasay, M. Fallahnezhad, Y. Zaremehrjerdi

引用次数: 15

Mathematical Investigation of Soil Temperature Variation for Geothermal Applications 地热应用中土壤温度变化的数学研究

International journal of engineering. Transactions A: basics Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.10a.23

R. K. Singh, Rishabh Sharma

引用次数: 3

Designing a High Resistant, High-torque Downhole Drilling Motor (RESEARCH NOTE) 设计一种高阻力、高扭矩的井下钻井马达(研究笔记)

International journal of engineering. Transactions A: basics Pub Date : 2017-09-08 DOI: 10.5829/ije.2017.30.10a.24

M. Dvoynikov, V. Syzrantsev, K. Syzrantseva

引用次数: 11

A Low Cost Numerical Simulation of a Supersonic Wind-tunnel Design 超音速风洞设计的低成本数值模拟

International journal of engineering. Transactions A: basics Pub Date : 2017-09-08 DOI: 10.5829/ije.2018.31.01a.18

H. Bagheri-Esfe, M. D. Manshadi

引用次数: 5

Investigation of Radiative Cooling Using a Photonic Composite Material for Water Harvesting 利用光子复合材料辐射冷却集水的研究

International journal of engineering. Transactions A: basics Pub Date : 2017-08-28 DOI: 10.5829/ije.2017.30.10a.19

S. Teja, C. Karthikeyan, M. B. S. Kumar

{"title":"Investigation of Radiative Cooling Using a Photonic Composite Material for Water Harvesting","authors":"S. Teja, C. Karthikeyan, M. B. S. Kumar","doi":"10.5829/ije.2017.30.10a.19","DOIUrl":"https://doi.org/10.5829/ije.2017.30.10a.19","url":null,"abstract":"The objective of this study is to design and analyse materials which are capable of harvesting water from thin air using condensation phenomenon which employs the radiative cooling approach. These passive cooling materials not only solve the water generating problems, but also employed in various cooling applications. The fundamental concept of radiative cooling is analysed and the performance parameters were identified to test the passive cooling ability of the designed material for water harvesting. The field of Photonics is studied which has the potential to obtain the surface temperature significantly lower than the atmospheric temperature by radiation phenomenon. Important parameters are identified to validate the performance of the proposed materials. ANSYS FLUENT is used to analyse the surface temperature for the given boundary conditions and the potential material which is capable of obtaining a significant temperature difference with respect to the ambient temperature is identified. A sandwich material is designed and its performance is evaluated using Computational Fluid Dynamics (CFD) by which we could achieve temperature difference of 15°C. To reduce the heat gain losses by conduction and convection, we designed a physical system which could maintain significant temperature difference even in the broad day-sunlight. CFD analysis of the designed system under similar boundary conditions gave satisfying results of maintaining the temperature difference of about 15°C for a prolonged period of time due to minimal heat gain losses. Later, two potential materials are manufactured and the performance parameters of these materials are characterized using U-V/Vis (Ultraviolet-Visible) and FTIR (Fourier Transform Infrared) Spectroscopy experiments. The results of absorption phenomenon in the U-V/Vis spectrum and the transmittance phenomenon in the FTIR spectrum of the two materials explain the reason for the passive cooling ability of materials.","PeriodicalId":416886,"journal":{"name":"International journal of engineering. Transactions A: basics","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128586601","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: 2

WAVELET NEURAL NETWORK WITH RANDOM WAVELET FUNCTION PARAMETERS 具有随机小波函数参数的小波神经网络

International journal of engineering. Transactions A: basics Pub Date : 2017-08-25 DOI: 10.5829/ije.2017.30.10a.12

H. Bazoobandi

引用次数: 2

Preparation and Characterization of an Antifouling Polyethersulfone Nanofiltration Membrane Blended with Graphene Oxide/Ag Nanoparticles 氧化石墨烯/银纳米颗粒聚醚砜防污纳滤膜的制备与表征

International journal of engineering. Transactions A: basics Pub Date : 2017-07-07 DOI: 10.5829/ije.2017.30.10a.02

F. Gholami, S. Zinadini, A. Zinatizadeh, Elham Noori, E. Rafiee

引用次数: 11