International Journal of Mechanical Engineering and Applications最新文献_第8页

Reproducing Failure Mode and Life Prediction of Expansion Joint Using Field Data 利用现场数据再现膨胀节失效模式及寿命预测

International Journal of Mechanical Engineering and Applications Pub Date : 2018-04-27 DOI: 10.11648/J.IJMEA.20180601.12

J. Oh, S. Cho, S. Won, D. Kang, Bongsoo Lee, Joong-Sik Heo

引用次数: 0

The Effect of the Fluid Film Variable Viscosity on the Hydrostatic Thrust Spherical Bearing Performance in the Presence of Centripetal Inertia and Surface Roughness 在向心惯性和表面粗糙度存在下，液膜变粘度对静压推力球面轴承性能的影响

International Journal of Mechanical Engineering and Applications Pub Date : 2018-03-07 DOI: 10.11648/j.ijmea.20180601.11

Ahmad Waguih Elescandarany

{"title":"The Effect of the Fluid Film Variable Viscosity on the Hydrostatic Thrust Spherical Bearing Performance in the Presence of Centripetal Inertia and Surface Roughness","authors":"Ahmad Waguih Elescandarany","doi":"10.11648/j.ijmea.20180601.11","DOIUrl":"https://doi.org/10.11648/j.ijmea.20180601.11","url":null,"abstract":"In response to the importance of the industry great need to the hydrostatic thrust spherical bearing, this study is performed. The stochastic modified Reynolds equation (developed by the author in his previous papers) applied to this type of bearings has become more developed to deal with the bearing static performance under the effect of the fluid film viscosity variation. The study showed the effect of the viscosity variation on the pressure, the load, the flow rate, the frictional torque, the friction factor, the power factor, the stiffness factor and the central pressure ratio as well as the effect of the speed parameter and the eccentricity on the temperature rise. The partial differential equation of the temperature gradient is derived from the fluid governing equations, integrated and applied to this type of bearings to calculate and predict the temperature distribution along the fluid film. The application of this temperature equation proved the excellence of the aforementioned optimum design of this bearing in our previous papers where the temperature of the outlet flow was less than 14 degrees centigrade over its inlet temperature.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126517647","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: 4

Transportation Engineering Technology – A Review, Part III 运输工程技术综述，第三部分

International Journal of Mechanical Engineering and Applications Pub Date : 2018-01-04 DOI: 10.11648/j.ijmea.s.2017050401.17

Vo Trong Cang

引用次数: 0

Determining the Optimized Repair Cycle Structure Considering the Repairing Cost and the Gamma-Percent Lifetime 考虑维修成本和寿命的优化维修周期结构的确定

International Journal of Mechanical Engineering and Applications Pub Date : 2017-12-25 DOI: 10.11648/j.ijmea.s.2017050401.16

Vo Trong Cang, Nguyen Duc Toan, D. Tuan

引用次数: 0

Study on Greenhouse Gases Emissions from Two Common Cars in Iran (Paykan Pick-up and Pride) 伊朗两种常见汽车的温室气体排放研究(Paykan皮卡和Pride)

International Journal of Mechanical Engineering and Applications Pub Date : 2017-12-15 DOI: 10.11648/J.IJMEA.20170506.11

A. Jahanbakhshi, G. Rezaei

引用次数: 2

Factors Affecting Technological Growth in Nigeria and the Way Forward 影响尼日利亚技术增长的因素及未来之路

International Journal of Mechanical Engineering and Applications Pub Date : 2017-10-20 DOI: 10.11648/J.IJMEA.20170505.15

Isioto Nte Nathaniel, O. Friday, Dickson Rachael

{"title":"Factors Affecting Technological Growth in Nigeria and the Way Forward","authors":"Isioto Nte Nathaniel, O. Friday, Dickson Rachael","doi":"10.11648/J.IJMEA.20170505.15","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20170505.15","url":null,"abstract":"This paper spotlights Nigeria’s technological antecedence and the factors affecting Nigeria’s technological growth with a view to proffering solution for a robust technological and industrialized structural framework as a way forward to achieving sustainable technological growth. Majorly, due to relegation of useful indigenous technology as a result of distractions, inability to comprehend what actually is the meaning of technology, inability to identify her appropriate technology and the guiding principle for technology transfer, among others have made it vivid that after over fifty years of independence, Nigeria has been depending, in several areas, on foreign nations for her various technological and industrial needs. This research paper relied majorly on information sources, such as government documents, academic journals and articles, conference papers and personal observations and interactions with people carrying this same burden for Nigeria. From the study, colonialism truncated and hindered improvement in the indigenous skills and techniques of the pre-colonial economy. However, the development of indigenous skills and techniques of pre-colonial Nigeria is a pre-requisite to sound technological growth, rather than depending on foreign inputs, which must be properly monitored and developed to set the pace for Nigeria’s industrialization.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129093964","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: 10

Numerical Investigation of Heat Transfer of CuO Nanofluid Using Eulerian-Eulerian Two Phase Model 基于欧拉-欧拉两相模型的CuO纳米流体传热数值研究

International Journal of Mechanical Engineering and Applications Pub Date : 2017-09-26 DOI: 10.11648/J.IJMEA.20170505.14

F. Amiri, M. Nazari, M. Shahmardan

{"title":"Numerical Investigation of Heat Transfer of CuO Nanofluid Using Eulerian-Eulerian Two Phase Model","authors":"F. Amiri, M. Nazari, M. Shahmardan","doi":"10.11648/J.IJMEA.20170505.14","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20170505.14","url":null,"abstract":"In this study, laminar forced convection of CuO nanofluid is numerically investigated in sudden expansion microchannel with expansion ratio of 3:1 and isotherm walls. The importance and developments of microfluidic devices, like expansion microchannel, has caused that the investigation of the flow and the heat transfer of nanofluid in sudden expansion microchannel to be so important. On the other hand, the two phase models can be used instead of single phase model very well. Among two phase models, Eulerian-Eulerian model is very efficient because of considering the relative velocity and temperature of the phases and the nanoparticle concentration distribution. An Eulerian two-fluid model is considered to simulate the nanofluid flow inside the microchannel and the governing mass, momentum and energy equations for both phases are solved using the finite volume method. It can be observed that the Eulerian two phase model of the CuO nanofluid enhances the heat transfer instead of using pure water as a coolant. Reynolds number and nanoparticle volume concentration increase the average Nusselt number, while the pressure drop increases only slightly. Also, the heat transfer increases with decrease in the nanoparticle diameter.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114560206","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: 4

Design, Manufacture and Performance Evaluation of a Soybean Paddle Thresher with a Blower 鼓风机大豆桨式脱粒机的设计、制造及性能评价

International Journal of Mechanical Engineering and Applications Pub Date : 2017-09-25 DOI: 10.11648/J.IJMEA.20170505.13

Philip Yamba, Enoch Asuako Larson, Zakaria Issaka, A. Akayeti

{"title":"Design, Manufacture and Performance Evaluation of a Soybean Paddle Thresher with a Blower","authors":"Philip Yamba, Enoch Asuako Larson, Zakaria Issaka, A. Akayeti","doi":"10.11648/J.IJMEA.20170505.13","DOIUrl":"https://doi.org/10.11648/J.IJMEA.20170505.13","url":null,"abstract":"Soybeans threshing is traditionally done by hand beating with a wooden stick on a hard surface which is a drudgeries operation which leads to time-consuming, grain damage and grain loss due to shattering for small-scale farmers. Therefore, a soybeans manual thresher (Pedal operated) machine attached to a blower was designed, manufactured and its performance evaluated to help eradicate this problem by reducing labor, improve post-harvest, and increase income to small-scale farmers. The thresher consists of a hopper, drum, shaft on bearings, frame, beaters, blower, chain, and sprocket power transmission, pedal and seat. The thresher was fabricated with sheets and angle iron and the mechanism is based on a combination of impact, compression, and shear. Two levels of moisture content level were combined to evaluate the performance of thresher in terms of its capacity, threshing efficiency and percentage grain damage. The combination of dried and wet sample mixture at a feed rate of 25kg yielded maximum threshing capacity of 96 kg/hr, 98.6% maximum threshing efficiency and minimum percent grain damage of 3.5% results was recorded, which was very satisfactory.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116062191","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

Experimental Studies on Micropumps Using Rotational/Reciprocating Motions of Magnetic Material Balls 磁性材料球旋转/往复运动微泵实验研究

International Journal of Mechanical Engineering and Applications Pub Date : 2017-09-18 DOI: 10.11648/j.ijmea.20170505.12

H. Kumamaru, Y. Nomura, Fuma Sakata, H. Fujiwara, K. Itoh

{"title":"Experimental Studies on Micropumps Using Rotational/Reciprocating Motions of Magnetic Material Balls","authors":"H. Kumamaru, Y. Nomura, Fuma Sakata, H. Fujiwara, K. Itoh","doi":"10.11648/j.ijmea.20170505.12","DOIUrl":"https://doi.org/10.11648/j.ijmea.20170505.12","url":null,"abstract":"In application of micropumps to new fields in chemistry, biology, medical science and others, smaller sizes are supposed to be important rather than higher pump performance. In this study, considering from such a view point, micropumps using rotational and reciprocating motions of magnetic material balls were proposed and studied experimentally. The pump performance, i.e. the relation between flow rate and pump head are measured from liquid level changes in two containers connected to the inlet and outlet of the micropump. For the rotational motion micropump, while the maximum flow rate obtained, ~2 mL/min, is large enough as a micropump, the maximum pump head achieved, ~15 mm, is small even for a micropump. It is desirable to increase the pump head furthermore for this micropump. For the reciprocating motion micropump, the maximum flow rate obtained and the maximum pump head achieved are ~7.5 mL/min and ~625 mm, respectively. These values of the pump performance are sufficient as a micropump. Both the micropumps can be incorporated into microfluidic devices (tips) and can pump arbitrary kind of liquid.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116793348","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

Benefit of Compressor Washing on Power Output in Oil and Gas Applications 压缩机清洗对石油和天然气应用中输出功率的好处

International Journal of Mechanical Engineering and Applications Pub Date : 2017-08-30 DOI: 10.11648/j.ijmea.20170505.11

Enyia James Diwa, D. Igbong, A. Archibong, U. Eyo

{"title":"Benefit of Compressor Washing on Power Output in Oil and Gas Applications","authors":"Enyia James Diwa, D. Igbong, A. Archibong, U. Eyo","doi":"10.11648/j.ijmea.20170505.11","DOIUrl":"https://doi.org/10.11648/j.ijmea.20170505.11","url":null,"abstract":"Fouling in gas turbine compressor has proven to be inevitable, but online compressor washing has shown to be promising in mitigating the effects of fouling. Despite the several researches and experiments carried out in laboratories or actual engine operations as presented in literatures, the economic benefit is always very important. This research aim to present the optimum online compressor water washes frequency and determines the creep life of the high pressure turbine HPT, which in this case is the first and second stage of the rotor blades. A Siemens twin shaft industrial gas turbine (SGT200 Tornado) was used for the performance simulation and degradation model. The engine code for Tornado gas turbine was not available in the Turbomatch library, as such data provided by engine manufacturer (Siemens, Lincoln, UK), was applied at the design point and the Turbomatch engine program ran successfully for both design and off-design point with the supplied data. The engine model was deteriorated with knowledge of underlying fouling mechanism and the possibility to apply the design point data using Pythia software and the non-linear gas path analysis with measurable parameters. Larson-Miller parameter LMP approach was applied in determining the effect of increasing turbine entry temperature TET on high power turbine HPT creep life. Hence, the compressor wash optimisation was determined, and the optimum online compressor wash interval was found to be once in every four days. The sensitivity analysis for the price of electricity, shutdown cost, fuel price, and degradation rate was tested, and the results are presented.","PeriodicalId":398842,"journal":{"name":"International Journal of Mechanical Engineering and Applications","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116169559","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