Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering最新文献_第4页

A Modified Preconditioning Approach for Nodal Integral Method 一种改进的节点积分法预处理方法

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/htff22.173

Nadeem Ahmed, Alok Kumar, Niteen Kumar, Suneet Singh

引用次数: 1

Flow Visualization in the Impeller and Diffuser of a Centrifugal Pump using Time-Resolved Particle Image Velocimetry 时间分辨粒子图像测速技术在离心泵叶轮和扩散器内的流动显示

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/icmie22.155

R. Perissinotto, W. Fonseca, R. Cerqueira, W. M. Verde, J. L. Biazussi, E. Franklin, A. Bannwart, Marcelo S. Castrot

{"title":"Flow Visualization in the Impeller and Diffuser of a Centrifugal Pump using Time-Resolved Particle Image Velocimetry","authors":"R. Perissinotto, W. Fonseca, R. Cerqueira, W. M. Verde, J. L. Biazussi, E. Franklin, A. Bannwart, Marcelo S. Castrot","doi":"10.11159/icmie22.155","DOIUrl":"https://doi.org/10.11159/icmie22.155","url":null,"abstract":"- The present paper describes an experimental study on the flow dynamics within a centrifugal pump impeller. A transparent pump prototype made of acrylic parts was firstly developed for flow visualization purposes. Then, single-phase flow experiments were conducted in different impeller rotational speeds and water flow rates. A time-resolved particle image velocimetry (TR-PIV) system was used as the flow visualization method. As a result, velocity fields were obtained in the whole impeller. They reveal that the flow behaviour is dependent on the pump operational condition. When the pump works at the best efficiency point (BEP), the flow is uniform and the streamlines follow the blade curvature. However, when the machine works at off-design conditions, the flow becomes complex, with the presence of turbulent structures which cause a reduction in the pump performance. This type of result may be useful to validate numerical simulations and support the proposition of new mathematical models, new impeller geometries, among other applications.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132122965","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 Investigation on Pressure Drop In Liquid-Liquid Taylor Flow Regimes 液-液泰勒流中压降的实验研究

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/htff22.156

Seyyed Saeed Shojaee Zadeh, V. Egan, P. Walsh

引用次数: 0

Study Of The Copper Flotation From Copper Smelter Slag, Using Seawater As Operation Water 以海水为操作水从铜冶炼渣中浮选铜的研究

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/mmm22.130

Erik Kohnenkamp, Felix Pizarro

引用次数: 0

Analysis of a Battery Thermal Management System for Electric Vehicles using Heat Pipe Technology 基于热管技术的电动汽车电池热管理系统分析

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/htff22.161

Eoin Guinan, J. Mooney, Johnathan Ottman, J. Punch, V. Egan

{"title":"Analysis of a Battery Thermal Management System for Electric Vehicles using Heat Pipe Technology","authors":"Eoin Guinan, J. Mooney, Johnathan Ottman, J. Punch, V. Egan","doi":"10.11159/htff22.161","DOIUrl":"https://doi.org/10.11159/htff22.161","url":null,"abstract":"This paper presents an analysis of the performance of a heat pipe assisted battery thermal management system (BTMS) as a means of passive heat dissipation from EV batteries to minimise required pumping power. A BTMS incorporating both standard heat pipes and multi-branched heat pipes (MBHPs) is analysed. The standard heat pipe configuration is analysed experimentally using a custom-built test rig and numerically using thermal equivalent circuit (TEC) models developed using MATLAB’s Simscape software. The MBHP setup is analysed numerically having validated the TEC models using the experimental data from the standard configuration. Experimental results showed that the standard heat pipe BTMS provided sufficient cooling at heat loads of <40W. However, at heat loads of 40W the maximum battery temperature marginally exceeded the maximum temperature criteria with a maximum battery block temperature of 42.9 o C and temperature difference between battery blocks of 4.3 o C recorded. Due to an increase in heat transfer coefficient with increasing coolant flow rate, the battery block temperature and temperature difference decrease. This decrease in temperature is counteracted by a decrease in the coefficient of performance of the cold plate by approximately 70% as pumping power increases due to increased pressure drop across the cold plate. This showed there are marginal gains to increasing flow rate in the BTMS. Numerical analysis of both setups shows a similar temperature response of the simulated batteries to the experimental setup with analytical results being within 15% the of experimental values. Therefore, a TEC can be used to predict battery temperatures. Numerical results show increased battery temperature for an MBHP setup but kept within the operating range for heat loads of <20W suggesting MBHP’s can perform sufficiently for normal battery discharge rates.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114434102","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

Omid Sam-Daliri, Pouyan Ghabezi, Tomas Flanagan, William Finnegan, Sinéad Mitchell, Noel Harrison

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/icmie22.142

P. Ghabezi, N. Harrison, T. Flanagan

引用次数: 0

A Heat Transfer Analysis of Axial and Radial Functionally Graded Ceramic Foams Solar Air Receivers 轴向和径向梯度陶瓷泡沫太阳能空气接收器的传热分析

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/htff22.141

A. Andreozzi, M. Iasiello

{"title":"A Heat Transfer Analysis of Axial and Radial Functionally Graded Ceramic Foams Solar Air Receivers","authors":"A. Andreozzi, M. Iasiello","doi":"10.11159/htff22.141","DOIUrl":"https://doi.org/10.11159/htff22.141","url":null,"abstract":"Volumetric solar receiver are promising as heat transfer devices in concentrated solar power applications because they allow to reduce heat losses at the receiver entrance when compared to more conventional tubular receivers. Among various porous materials, ceramic foams have been shown to be promising because of their extended heat transfer area and effective thermal conductivity, especially when they are manufactured by considering variable morphologies thanks to modern techniques like additive manufacturing. In this contribution, porous media numerical simulations are presented for fluid flow and heat transfer in ceramic foams receiver with different porosity functions on either axial or radial directions, and also when porosity varies on both directions. Such simulations are performed by employing Beer-Lambert law to model radiative heat transfer, and a Gaussian distribution for the incoming radiation. Results are obtained by constraining the average porosity for the different cases, showing that graded foams allow to obtain more or less similar outflow temperatures, but with reduced heat losses at the receiver entrance and also with less uniform velocity profiles to promote heat convection in some critical points of the receiver.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129597873","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

Numerical Simulation through Fluent Of a Cold, Swirling Particle Flow in a Combustion Chamber 燃烧室中冷旋流颗粒流的数值模拟

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/htff22.137

Wronski Tomek, Z. Nabila, Schönnenbeck Cornelius, Brillard Alain

{"title":"Numerical Simulation through Fluent Of a Cold, Swirling Particle Flow in a Combustion Chamber","authors":"Wronski Tomek, Z. Nabila, Schönnenbeck Cornelius, Brillard Alain","doi":"10.11159/htff22.137","DOIUrl":"https://doi.org/10.11159/htff22.137","url":null,"abstract":"Extended Abstract The study aims to first model the cold, confined and swirling flow in a magnesium burner. One of the most important features of the experimental burner is the presence of a significant recirculation zone, which is crucial for stabilizing the flame in the combustion chamber, [1]. Before modelling the combustion reaction and the flame, a first step is the simulation of the cold monophasic airflow and the accurate simulation of the recirculation zone. To validate the numerical simulations performed with the ANSYS Fluent software, experimental velocity measurements were first made in a 1:1 scale PMMA replica of the experimental burner. A constant temperature hot-wire anemometer was used to determine radial profiles of axial velocity. A low swirl case (S=0.13) was first considered because of its apparent simplicity. Simulation results obtained using different eddy viscosity models were compared to the experimental data and the Standard k-ε model proved to predict the velocity profiles and the central recirculation zone with the most accuracy. A high swirl case was then studied (S=2.94), corresponding to the conditions occurring in the experimental burner. In this case, the turbulence and its anisotropy appeared to be too strong for the eddy viscosity models previously used, and they failed to provide a converging solution. The RSM model was better suited for the task and could predict the position, size and shape of the central toroidal recirculation zone with acceptable accuracy, although important errors were still observed for the velocity values. Part of the inaccuracies could be explained by the usage of first-order","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129688384","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

Heat Transfer Study for Oil-in-Water Emulsion Jets Impinging onto hot Metal Surface 水包油乳液射流冲击热金属表面的传热研究

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/htff22.190

K. Nabbout, L. Pasternak, M. Sommerfeld, B. Bock-Marbach, J. Kuhnert, E. Barth, E. Uhlmann

{"title":"Heat Transfer Study for Oil-in-Water Emulsion Jets Impinging onto hot Metal Surface","authors":"K. Nabbout, L. Pasternak, M. Sommerfeld, B. Bock-Marbach, J. Kuhnert, E. Barth, E. Uhlmann","doi":"10.11159/htff22.190","DOIUrl":"https://doi.org/10.11159/htff22.190","url":null,"abstract":"– The purpose of this work is to analyse numerically as well as experimentally liquid jets impinging at different angles (30°, 60° and 90°) and different velocities (4.7 m/s, 7.0 m/s and 9.7 m/s) onto a hot circular plate made of Inconel 718. Liquids used in the experiments are water and oil-in-water emulsion with 8% concentration of the mineral oil Adrana AY 401 from Houghton Deutschland GmbH. An infrared camera is used to measure the black-coated rear face of the plate during the jet cooling process. The temperature field obtained is then used as input to estimate the heat transfer coefficient. The heat transfer coefficient is estimated by solving an Inverse Heat Transfer Problem (IHTP). In addition, the transient growth of the wetting area is also shown for both liquids. The heat transfer coefficient obtained from the experiments are utilised as input in numerical simulations with the Finite-Pointset-Method (FPM). Comparison between experiments and simulations is done to validate the recently implemented evaporation modelling in the MESHFREE software.","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134352052","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

The Influence of Sensor Position on the Measurement of Recovery Temperature in Compressible Flow 传感器位置对可压缩流中恢复温度测量的影响

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI: 10.11159/htff22.125

A. Straatman, M. Parker, Benjamin Jentz

{"title":"The Influence of Sensor Position on the Measurement of Recovery Temperature in Compressible Flow","authors":"A. Straatman, M. Parker, Benjamin Jentz","doi":"10.11159/htff22.125","DOIUrl":"https://doi.org/10.11159/htff22.125","url":null,"abstract":"Extended Abstract The measurement of temperature in high-speed, compressible flows is complicated by the fact that both the static and dynamic components of temperature can be significant and may be difficult to discern from one another based on the sensor temperature alone. In most cases, the sensor measures neither the static or total temperature, but rather an intermediate “recovery temperature”, which comprises the static temperature and a portion of the dynamic temperature [1]. Since it is normally the static (thermodynamic) temperature that is needed, a means must be available to convert the sensor (recovery) temperature into static temperature. A study conducted by Parker et al. [2] included both experiments and computational fluid dynamics simulations, and investigated the meaning of the temperature value measured by a simple cylindrical probe (thermistor sensor) inserted into a high-speed airflow in a small pipe. The study compared the sensor temperature to a temperature measured by a highly-accurate instrument and then presented an analytical approach for converting the sensor temperature to the local static temperature based on other easily attainable measurements. The article also showed that the measured temperature was dependent upon the sensor position in the airflow. The results show that the recovery factor is dependent on whether the sensor tip is aligned with the tube inner wall or protruding into the airflow. Details of conjugate simulations of a cylindrical sensor placed in a compressible flow of air in a tube show how probe protrusion leads to a modified flow field and a different sensor temperature. Specifically, for a given flow rate, static temperature in the vicinity of the sensor nose is shown to drop with increasing protrusion length due to the increased local","PeriodicalId":385356,"journal":{"name":"Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133874562","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