Journal of Electrostatics最新文献_第10页

Effect of collection efficiency and reducing ozone generation in an electrostatic precipitator with knife edge disk type electrode 刃盘式电极电除尘器对收集效率和减少臭氧产生的影响

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-09-01 DOI: 10.1016/j.elstat.2023.103842

Akinori Zukeran , Yuto Ikeda , Fumiki Mashimo , Koji Yasumoto , Masahiro Matsumoto , Noboru Matsumoto

{"title":"Effect of collection efficiency and reducing ozone generation in an electrostatic precipitator with knife edge disk type electrode","authors":"Akinori Zukeran , Yuto Ikeda , Fumiki Mashimo , Koji Yasumoto , Masahiro Matsumoto , Noboru Matsumoto","doi":"10.1016/j.elstat.2023.103842","DOIUrl":"10.1016/j.elstat.2023.103842","url":null,"abstract":"<div>In this study, the experiments were carried out to investigate the effect of a wire diameter on reducing ozone generation and improving the collection efficiency for particle sizes larger than 24 nm in an electrostatic precipitator (ESP) with wire electrode. Furthermore, the effect of the ESP with a knife-edge disk electrode was also investigated, since a wire will be broken. The ESP consisted of a discharging section and an electrostatic section. Two types of discharging sections were used. One was wire-to-plate configuration, and another was a knife-edge disk electrode structure. Positive DC high voltage was applied to the ESP, and gas velocity was 0.6 m/s. As a result, the collection efficiency increased as the diameter of the wire electrode decreased. The efficiency for particle sizes greater than 400 nm achieved more than 99.3%, and the average efficiency for the particle sizes between 24 nm and 213 nm was 99.8% at the ozone concentration of 0.01 ppm and the fine wire diameter of 0.1 mm. In the ESP with knife edge disk type electrode, the efficiency increased with decreasing the diameter of the disk electrode. The collection efficiency for particle sizes larger than 400 nm achieved 99.8% or higher, and the average efficiency for the sizes between 24 nm and 213 nm was 99.0% at the ozone concentration of 0.01 ppm and the disk diameter of 28 mm. The effect which was equivalent to the ESP with fine wire electrode was obtained in the ESP with knife edge disk electrode.</div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41262262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A multi-scale simulation method for powder coating with moving powder guns 移动式粉末枪粉末涂层的多尺度模拟方法

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-09-01 DOI: 10.1016/j.elstat.2023.103843

Tomas Johnson , Andrea Ruggiu , Melanie Quast , Karlheinz Pulli , Andreas Mark , Matthias Bader , Niklas Sandgren , Markus Cudazzo , Fredrik Edelvik

{"title":"A multi-scale simulation method for powder coating with moving powder guns","authors":"Tomas Johnson , Andrea Ruggiu , Melanie Quast , Karlheinz Pulli , Andreas Mark , Matthias Bader , Niklas Sandgren , Markus Cudazzo , Fredrik Edelvik","doi":"10.1016/j.elstat.2023.103843","DOIUrl":"10.1016/j.elstat.2023.103843","url":null,"abstract":"<div>A mathematical model and numerical method, supported by experiments, to simulate industrial scale powder coating for moving coating guns is developed. The numerical method is based on a model reduction procedure that starts with a three species electrostatic model for the negative corona discharge at the nozzle exit of the gun. It is reduced to a one species electrostatic model away from the gun, which is coupled to a RANS fluid model and Lagrangian particle tracking and charging in a detailed stationary simulation. The final part consists of coating simulation with a moving gun, enabled by immersed boundary methods that do not require a body fitted mesh. In the coating simulation the detailed simulation results are reinjected, preserving the size and charge distribution of the powder particles. The method is validated with coating thickness measurements for horizontal and vertical lines on flat and two sets of bent panels: towards and away from the applicator. The bent panels are used to validate the performance on highly convex and concave objects.</div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46356534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparison of negative streamer development in synthetic ester and mineral oil in a point-sphere gap divided by a pressboard barrier 合成酯和矿物油在由压板屏障分隔的点球间隙中负流光发展的比较

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-09-01 DOI: 10.1016/j.elstat.2023.103839

Pawel Rozga, Filip Stuchala, Bartlomiej Pasternak, Malgorzata Binek

{"title":"Comparison of negative streamer development in synthetic ester and mineral oil in a point-sphere gap divided by a pressboard barrier","authors":"Pawel Rozga, Filip Stuchala, Bartlomiej Pasternak, Malgorzata Binek","doi":"10.1016/j.elstat.2023.103839","DOIUrl":"10.1016/j.elstat.2023.103839","url":null,"abstract":"<div>This article presents the results of the studies on development of negative streamers in synthetic ester and mineral oil with electrode system using a pressboard barrier. The tests were performed at standard lightning impulse voltage in point-sphere electrode configuration as reference system and a 5 mm thick pressboard barrier placed in different locations between the point and the sphere. Introducing pressboard between the electrodes allowed to relate the observations to the real insulating systems where long oil gaps are divided on shorter by insulating barriers. It was done to show whether pressboard barrier changes the streamers behavior in the considered electrode gap distance what is important from the viewpoint of assessment of dielectric properties of alternative liquids versus mineral oils. The results showed that the pressboard barrier for both liquids tested prevents breakdown. In addition, the barrier causes reduction of the propagation velocity of the streamers in synthetic ester, which is benefit in relation to the results concerning free liquid gaps.</div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43223294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electric field and EHD flow in longitudinal wire-to-plate DC and DBD electrostatic precipitators: A numerical study 纵向线-板直流和DBD静电除尘器中的电场和EHD流动：数值研究

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-07-01 DOI: 10.1016/j.elstat.2023.103826

Orcun Ekin , Kazimierz Adamiak

{"title":"Electric field and EHD flow in longitudinal wire-to-plate DC and DBD electrostatic precipitators: A numerical study","authors":"Orcun Ekin , Kazimierz Adamiak","doi":"10.1016/j.elstat.2023.103826","DOIUrl":"10.1016/j.elstat.2023.103826","url":null,"abstract":"<div>In this study, the electrical and electrohydrodynamic (EHD) flow properties of a wire-to-plate electrostatic precipitator with a longitudinal wire electrode are investigated through a numerical simulation. The two modes of operation are considered: DC and AC supply voltages. The AC model features dielectric layers over collecting electrodes, hence a dielectric barrier discharge mechanism. To predict the ion concentration on the wire electrode surface, Kaptzov's hypothesis is employed. Both electrical and fluid flow equations are solved using the Finite Element Method. The EHD flow properties are estimated by simulating electric field, space charge density and fluid flow in the 3D precipitator channel. The results suggest that 1000 Hz frequency in AC supply generates EHD force with a 9 × 104 N/m3 maximum alue, which is an order of magnitude higher than the same value under DC supply. However, for 100 Hz supply voltage frequency the EHD force is lower than that for the DC supply and equal to 8 × 103 N/m3, although with a greater level of vorticity. The proposed models for DC and AC supply voltages display close characteristics to their experimental references with an average relative error of 13.5%.</div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48504157","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the minimum and maximum flowrate of electrospraying: A practical approach, based on fundamentals, for design purposes 关于电喷涂的最小和最大流量:基于基本原理的实用方法，用于设计目的

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-07-01 DOI: 10.1016/j.elstat.2023.103809

J.C.M. Marijnissen , C.U. Yurteri , S.W. Karuga , R.P.A. Hartman

引用次数: 0

Parametric study of DBD plasma actuator for heat transfer enhancement in flow over a flat plate at low Reynolds numbers 低雷诺数平板流动中DBD等离子体作动器强化传热的参数研究

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-07-01 DOI: 10.1016/j.elstat.2023.103825

H. Moayedi, N. Amanifard, Hamed Mohaddes Deylami

引用次数: 1

Parametric study of DBD plasma actuator for heat transfer enhancement in flow over a flat plate at low Reynolds numbers 低雷诺数平板流动中DBD等离子体作动器强化传热的参数研究

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-07-01 DOI: 10.1016/j.elstat.2023.103825

Hesam Moayedi , Nima Amanifard , Hamed Mohaddes Deylami

{"title":"Parametric study of DBD plasma actuator for heat transfer enhancement in flow over a flat plate at low Reynolds numbers","authors":"Hesam Moayedi , Nima Amanifard , Hamed Mohaddes Deylami","doi":"10.1016/j.elstat.2023.103825","DOIUrl":"https://doi.org/10.1016/j.elstat.2023.103825","url":null,"abstract":"<div>The present study intends to find the optimal configurations of Dielectric-Barrier-Discharge (DBD) plasma actuators to augment the thermo-hydraulic performance in air flow over a flat plate at low Reynolds numbers. A range of parametric studies are conducted to determine the impact of the major contributing variables; Reynolds number, voltage frequency, and the applied voltage of the DBD actuator, on the heat transfer. This study reports that in the presence of plasma actuation, the factor of enhancement (<math><mrow><msub><mrow><mi>N</mi><mi>u</mi></mrow><mi>m</mi></msub><mo>/</mo><msub><mrow><mi>N</mi><mi>u</mi></mrow><mrow><mi>m</mi><mn>0</mn></mrow></msub></mrow></math>) achieves about 3.76. Results show that reducing the Reynolds number and raising the frequency and applied voltage of the DBD actuator improve the factor of enhancement. Furthermore, the plasma system thermal efficiency (PSTE) to achieve the optimized electric power consumption and heat transfer augmentation is introduced as the rate of increase of enhancement factor to the rate of increase of consumed electric power. The frequency and applied voltage for the DBD actuator are used as the design variables to find the optimum configurations. Optimum electric power consumption and configurations of DBD plasma actuator based on Reynolds number are determined. Results also show that Vapp = 10.5 kV and f = 5 kHz conditions for DBD plasma actuator is much beneficial than the other configurations in the presence of low Reynolds number external flow. This study's findings will benefit designers in developing high-performance heat transfer.</div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49754955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Experimental investigation of a new solar panels cleaning system using ionic wind produced by corona discharge 新型太阳能电池板电晕放电离子风清洗系统的实验研究

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-07-01 DOI: 10.1016/j.elstat.2023.103827

Amar Tilmatine , Nezha Kadous , Khelifa Yanallah , Yassine Bellebna , Zeid Bendaoudi , Ayyoub Zouaghi

引用次数: 2

Electrohydrodynamics of conducting droplets suspended in a low-conducting liquid: The effect of the difference in mobilities of positive and negative ions 悬浮在低导电性液体中的导电液滴的电流体动力学:正离子和负离子迁移率差异的影响

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-07-01 DOI: 10.1016/j.elstat.2023.103828

I.A. Dobrovolskii, S.A. Vasilkov, V.A. Chirkov

引用次数: 0

Study on the influence of electrodes on the collection efficiency during the treatment of welding fume in electrostatic precipitators 电除尘器处理焊烟过程中电极对收集效率影响的研究

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2023-05-01 DOI: 10.1016/j.elstat.2023.103808

引用次数: 0