Journal of Electrostatics最新文献_第9页

Oscillation suppression for pulsed arc electrohydraulic discharges based on plasma impedance model 基于等离子体阻抗模型的脉冲电弧电液放电振荡抑制技术

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-04-04 DOI: 10.1016/j.elstat.2024.103923

Yingbo Yu, Zhongjian Kang

{"title":"Oscillation suppression for pulsed arc electrohydraulic discharges based on plasma impedance model","authors":"Yingbo Yu, Zhongjian Kang","doi":"10.1016/j.elstat.2024.103923","DOIUrl":"https://doi.org/10.1016/j.elstat.2024.103923","url":null,"abstract":"<div><p>The circuit oscillation generated during the process of pulsed arc electrohydraulic discharge can prolong the discharge time and pose potential hazards to the withstand voltage of the discharge equipment. To enhance the anti-oscillation performance of the equipment, the structure of the gas spark switch was analyzed and an improved pulse power switch for suppressing circuit oscillation was designed. Firstly, a two-dimensional axisymmetric simulation model of the gas spark switch was established by COMSOL software, and a theoretical model to express the impedance of the plasma channel through the series combination of resistance and inductance was put forward. Then, the correctness of the theoretical model was proved by the nonlinear regression method considering the capacitance effect of plasma discharge, and the results show that the theoretical model almost coincides with the actual discharge waveform, with a fitting rate of 99.73%. Finally, a thyristor-based pulse power switch was designed, and an electrohydraulic discharge experiment was carried out. The experimental results show that the designed switch can reliably control the output of the high-voltage pulses even if the repetitive discharge frequency is higher than 60 Hz under 8.5 kV voltage. Furthermore, the circuit oscillation process was suppressed, and the oscillation time was reduced from 242μs to 39 μs, with a decrease of 83.88 %. This study has potential application value in underwater high-voltage discharge applications.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"129 ","pages":"Article 103923"},"PeriodicalIF":1.8,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140343810","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

An analytical model-based assessment of Wet Electrostatic Scrubbing for mitigating fine and ultrafine particles emissions in domestic biomass boilers 基于分析模型的湿式静电除尘评估，以减少家用生物质锅炉中的细颗粒和超细颗粒排放

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-03-27 DOI: 10.1016/j.elstat.2024.103921

Arianna Parisi, Francesco Di Natale

引用次数: 0

Design and analysis of triboelectric energy harvester with an application in self-powered smart mask 应用于自供电智能面罩的三电能收集器的设计与分析

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-03-25 DOI: 10.1016/j.elstat.2024.103917

Souvik Khan, Banibrata Mukherjee

{"title":"Design and analysis of triboelectric energy harvester with an application in self-powered smart mask","authors":"Souvik Khan, Banibrata Mukherjee","doi":"10.1016/j.elstat.2024.103917","DOIUrl":"https://doi.org/10.1016/j.elstat.2024.103917","url":null,"abstract":"<div><p>The epidemiological information concerning novel corona virus (SARS-Cov-2) seeks attention nowadays to get an overview of global as well as country-based cases and deaths so far. The utilization of face mask has become evident for the protective measure of mankind to filter out the infiltrating virus from outside. In this paper, we have analysed various triboelectric based energy harvester configurations focusing on its application in self-powered smart mask design to combat SARS-Cov-2. Smart mask will comprise of triboelectric nanogenerator (TENG) and a smart layer to execute electrocution of the infiltrating virus as well as ensure the safety of human being (I < 10 mA). The theoretical investigations and simulation studies are carried out for different triboelectric materials and a comparative analysis is also portrayed in the context of designing self-powered smart mask under different operating modes. It has been observed that polypropylene-poly methyl methacrylate (PP-PMMA) material combination produces an electrical field of 0.9916 MV/m which is sufficient to electrocute the virus without causing harm to human body. Hence the design and comprehensive analysis is carried out considering PP-PMMA combination for various possible modes of operation like constant velocity, constant acceleration, sinusoidal and generic one. Here, respiration is considered as major mechanical input source for TENG whereas other biomechanical activities like talking, chewing are also discussed in the context of self-powered application of smart mask. It has been demonstrated that the physiological activity like chewing and respiration altogether produce a typical input force of 23.65 N which is sufficient to electrocute the incoming virus without causing any hazard to human health.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"129 ","pages":"Article 103917"},"PeriodicalIF":1.8,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140290537","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

Extraction efficacy of newly designed electric fields on red beetroot samples 新设计的电场对红色甜菜根样品的提取效果

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-03-23 DOI: 10.1016/j.elstat.2024.103919

Melih Çoban , Damla Nur Türker , Murat Fidan , Gulsun Akdemir Evrendilek

引用次数: 0

The electric potential and field of a finite conducting rod, and a conducting disk 有限导电杆和导电盘的电动势和电场

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-03-21 DOI: 10.1016/j.elstat.2024.103920

Mohammad Khorrami

引用次数: 0

Dielectric barrier discharge actuators: Momentum injection into co-flow and counter-flow freestream 介质阻挡放电致动器：向同流和逆流自由流注入动量

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-03-21 DOI: 10.1016/j.elstat.2024.103918

Anthony Tang , Nathan Li , Benjamin Price , Alexander Mamishev , Alberto Aliseda , Igor Novosselov

{"title":"Dielectric barrier discharge actuators: Momentum injection into co-flow and counter-flow freestream","authors":"Anthony Tang , Nathan Li , Benjamin Price , Alexander Mamishev , Alberto Aliseda , Igor Novosselov","doi":"10.1016/j.elstat.2024.103918","DOIUrl":"https://doi.org/10.1016/j.elstat.2024.103918","url":null,"abstract":"<div><p>In a quiescent environment, dielectric barrier discharge (DBD) plasma actuators generate a wall jet through the interaction of ionized and neutral molecules in an electric field. In external flow, the coupling between electrohydrodynamic (EHD), turbulence, inertial, and viscous effects in the flow boundary layer is more complex and requires additional investigation. We experimentally study momentum injection by DBD actuators into the free stream flow with Re = 35,000 and 75,000 in co-flow and counter-flow scenarios over a range of V<sub>AC</sub> = 12 kV–19.5 kV peak-to-peak at a frequency of 2 kHz. In co-flow, the momentum injection leads to boundary layer thinning and fluid entrainment from the freestream into the DBD forcing region, while in the counter-flow configuration, flow separation can occur. A separation bubble is observed at Re = 35,000 for the tested condition. The momentum difference in the counter-flow configuration is six times greater than the EHD jet momentum in a quiescent environment. Both co-flow and counter-flow momentum injections show diminishing effects with higher Re. We show that the resulting flow pattern is not a superposition of the EHD jet and the free stream but is determined by the coupling and competition of inertial, viscous, and Coulombic effects between the EHD-driven forcing and the external flow. The proposed non-dimensional momentum ratio (M*) of EHD jet momentum to momentum in the external flow boundary layer can be used to predict the onset of separation; however, additional experimental and numerical studies are required to generalize this concept to other flow scenarios. The velocity profiles and momentum measurements presented here can be used to validate numerical models and inform the design of DBD actuators for active flow control.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"129 ","pages":"Article 103918"},"PeriodicalIF":1.8,"publicationDate":"2024-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140180317","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

Modeling analysis of the electrostatic interaction between a nth-order electric multipole moment and dielectric layers utilizing the image multipole method 利用图像多极法对 nth 阶电多极矩与介电层之间的静电相互作用进行建模分析

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-03-16 DOI: 10.1016/j.elstat.2024.103906

Yue Feng , Zilong Zhou , Yanhui Han , Zhiliang Gao , Xu Tang , ShanShan Ma , Ying Xiong

{"title":"Modeling analysis of the electrostatic interaction between a nth-order electric multipole moment and dielectric layers utilizing the image multipole method","authors":"Yue Feng , Zilong Zhou , Yanhui Han , Zhiliang Gao , Xu Tang , ShanShan Ma , Ying Xiong","doi":"10.1016/j.elstat.2024.103906","DOIUrl":"https://doi.org/10.1016/j.elstat.2024.103906","url":null,"abstract":"<div><p>Accurate determination of the electrostatic force exerted on multipole moments is essential in comprehending the interaction between charged bodies and dielectric layers. A comprehensive solution is presented in this study for the calculation of the electric potential, field, and force generated by <em>n</em>th-order electric multipole above a semi-infinite dielectric body covered by a dielectric layer using the image multipole method. The present study investigates the impact of dielectric thickness, permittivity, and separation distance on the electrostatic interaction between an electric multipole moment and a semi-infinite dielectric body. The calculation results indicate that as the thickness of the dielectric layer increases and the dielectric constant of the surrounding medium surpasses that of the dielectric layer, the electrostatic attractive force undergoes a transition to a repulsive force. The magnitude of the electrostatic force acting on a <em>n</em>th-order electric multipole moment is directly proportional to the square of the value of the electric multipole moment and inversely proportional to the 2 (<em>n</em>+1) power of the distance.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"129 ","pages":"Article 103906"},"PeriodicalIF":1.8,"publicationDate":"2024-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140142042","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

Electrical properties of the unit square plate 单位方形板的电气性能

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-03-12 DOI: 10.1016/j.elstat.2024.103907

Jaeho Kim , Chi-Ok Hwang

引用次数: 0

Influence of nonuniform electric field due to a spherical collector on the particles dynamics in quiescent air 球形收集器产生的非均匀电场对静止空气中粒子动力学的影响

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-03-12 DOI: 10.1016/j.elstat.2024.103916

Abhishek Srivastava, Debabrat Biswal, Bahni Ray, Mayank Kumar, Debabrata Dasgupta

引用次数: 0

Extraction of transferred charge signal of gas-solid two-phase flow based on nonlinear time domain analysis 基于非线性时域分析的气固两相流转移电荷信号提取方法

IF 1.8 4区工程技术

Journal of Electrostatics Pub Date : 2024-03-01 DOI: 10.1016/j.elstat.2024.103905

Lin Jia, Xujun Su, Guibo Yu, Qiao Ma, Jinli Che

{"title":"Extraction of transferred charge signal of gas-solid two-phase flow based on nonlinear time domain analysis","authors":"Lin Jia, Xujun Su, Guibo Yu, Qiao Ma, Jinli Che","doi":"10.1016/j.elstat.2024.103905","DOIUrl":"https://doi.org/10.1016/j.elstat.2024.103905","url":null,"abstract":"<div><p>—When the particles are in the gas-solid two-phase flow, the transferred charge will be generated. The transferred signal obtained by using the inner flush-mounted electrostatic sensor is rich in flow information, which can provide important support for studying the flow law of gas-solid two-phase flow. In this paper, the nonlinear time-domain analysis method based on embedded empirical mode decomposition (EEMD) and largest Lyapunov exponent (LLE) is proposed to extract the transferred charge signal of gas-solid two-phase flow. Firstly, the electrostatic signal is decomposed and the induced charge signal is removed by the combination of EEMD and autocorrelation function correlation coefficient index. Then, the LLE of the remaining intrinsic mode function (IMF) components is calculated, and the corresponding IMF is selected to reconstruct into the transferred charge signal according to the condition that LLE>0. The results show that the LLE of transferred charge signal increases with the increase of the superficial gas velocity and decreases with the increase of solid gas mass ratio. The root mean square (RMS) and standard deviation (STD) of the transferred charge signal increase with the increase of the superficial gas velocity, increase with the increase of the solid gas mass ratio, and slow down at high solid gas mass ratio.</p></div>","PeriodicalId":54842,"journal":{"name":"Journal of Electrostatics","volume":"128 ","pages":"Article 103905"},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139992996","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