Spark gap ≈ Spark gap
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Multi response optimization of wire-EDM process parameters of ballistic grade aluminium alloy Open
In the current investigation, a multi response optimization technique based on Taguchi method coupled with Grey relational analysis is planned for wire-EDM operations on ballistic grade aluminium alloy for armour applications. Experiments …
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Empirical Investigations during WEDM of Ni-27Cu-3.15Al-2Fe-1.5Mn Based Superalloy for High Temperature Corrosion Resistance Applications Open
Monel K-500, a nickel–copper based alloy, is a very hard and tough material. Machining of such hard and tough materials always becomes a challenge for industry and this has been resolved by wire electric discharge machining (WEDM), a popul…
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A time-resolved imaging and electrical study on a high current atmospheric pressure spark discharge Open
We present a time-resolved imaging and electrical study of an atmospheric pressure spark discharge. The conditions of the present study are those used for nanoparticle generation in spark discharge generator setups. The oscillatory bipolar…
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Modeling and optimization of process variables of wire-cut electric discharge machining of super alloy Udimet-L605 Open
This paper presents the behavior of Udimet-L605 after wire electric discharge machining and evaluating the WEDM process using sophisticated machine learning approaches. The experimental work is depicted on the basis of Taguchi orthogonal L…
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Plasma-assisted combustion with nanosecond discharges. I: Discharge effects characterization in the burnt gases of a lean flame Open
The prediction of a flame response to plasma assistance requires extensive knowledge of discharge-induced plasma kinetics. Detailed studies of nanosecond discharges are common in N 2 /O 2 and fresh combustible mixtures but are still lackin…
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Mechanisms responsible for the initiation of a fast breakdown in an atmospheric discharge Open
Here, the initial stage of the fast electrical breakdown of an air gap with a pin-to-plane electrode geometry is studied on a nanosecond time scale using multi-frame laser probing with an exposure time of 70 ps and spatial resolution as hi…
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Existence of steady gap solutions in rotating black hole magnetospheres Open
Under conditions prevailing in certain classes of compact astrophysical\nsystems, the active magnetosphere of a rotating black hole becomes\ncharge-starved, giving rise to formation of a spark gap in which plasma is\ncontinuously produced.…
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Investigation for obtaining the optimal solution for improving the performance of WEDM of super alloy Udimet-L605 using particle swarm optimization Open
The purpose of the current study is to increase the productivity, accuracy and reduce the cost of wire electric discharge machining of super alloy Udimet-L605. The pulse-on time, pulse-off time, peak current, wire tension, spark gap voltag…
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A Novel Flushing Mechanism to Minimize Roughness and Dimensional Errors during Wire Electric Discharge Machining of Complex Profiles on Inconel 718 Open
One of the sustainability goals in the aeronautical industry includes developing cost-effective, high-performance engine components possessing complex curved geometries with excellent dimensional precision and surface quality. In this rega…
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From plasma to nanoparticles: optical and particle emission of a spark discharge generator Open
The increased demand for high purity nanoparticles (NPs) of defined geometry necessitates the continuous development of generation routes. One of the most promising physical techniques for producing metal, semiconductor or alloy NPs in the…
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Multi response optimization in wire electrical discharge machining of Inconel X-750 using Taguchi’s technique and grey relational analysis Open
The effective optimization of machining process parameters affects dramatically the cost and production time of machined components as well as the quality of the final products. This study presents an investigation on cutting speed and sur…
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Characterization of a copper spark discharge plasma in argon atmosphere used for nanoparticle generation Open
Spark discharge nanoparticle generation is a dynamically developing application of discharge plasmas. In the present study a spark plasma used for nanoparticle generation is characterized by means of spatially and temporally resolved optic…
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Numerical and experimental investigation of dielectric recovery in supercritical N<sub>2</sub> Open
A supercritical (SC) nitrogen (N2) switch is designed and tested. The dielectric strength and
\nrecovery rate of the SC switch are investigated by experiments. In order to theoretically study
\nthe discharge and recovery process of the SC …
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Application of Taguchi, Fuzzy-Grey Relational Analysis for Process Parameters Optimization of WEDM on Inconel-825 Open
Process parameters optimization of multiple response characteristics of WEDM on Inconel-825 super alloy using FuzzyGrey relational analysis is presented in this paper. Response characteristics such as MRR, surface finish and spark gap are …
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Compact intense electron-beam accelerators based on high energy density liquid pulse forming lines Open
This paper provides a review of the compact intense electron-beam accelerators (IEBAs) based on liquid pulse forming lines (PFLs) that have been developed at the National University of Defense Technology (NUDT) in China. The history and ro…
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Process parameters optimization and performance analysis of micro-complex geometry machining on Ti6Al4V Open
The aeronautical industry relies on high-performance equipment that demands materials with exceptional engineering attributes, such as the Ti6Al4V alloy. However, the complexity of the parts used in these applications presents challenges r…
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Research on Maintaining Voltage of Spark Discharge in EDM Open
Currently there is no unified understanding about formation of maintaining voltage of spark discharge in electrical discharge machining (EDM), frequency and amplitude of high-frequency components of maintaining voltage and the relationship…
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Electric Breakdown in Long Discharge Tubes at Low Pressure (Review) Open
The review is devoted to studies of the processes and mechanisms of ignition of a glow discharge in tubes whose length significantly exceeds their diameter (long discharge tubes) at low pressures (~10 Torr and lower) and moderate voltage r…
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Microstructural analysis and multi response optimization of WEDM of Inconel 825 using RSM based desirability approach Open
Increasing demand of aerospace industry for more heat resistant and tough material have open up the possibility of the use of Inconel 825 for making of combustor casing and turbine blades. Because of its robust nature, Inconel 825 is a dif…
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A new approach to the high-yield synthesis of nanoparticles by spark discharge Open
A new approach to the high-yield synthesis of nanoparticles in the multi-gap (up to 12) spark discharge generator operating at a repetition rate as high as 2.5 kHz is discussed. This approach allows to increase the production rate by a fac…
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Experimental study of atmospheric pressure single-pulse nanosecond\n discharge in pin-to-pin configuration Open
In this work, we present an experimental study of nanosecond high-voltage\ndischarges in a pin-to-pin electrode configuration at atmospheric conditions\noperating in single-pulse mode (no memory effects). Various discharge\nparameters, inc…
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Enhanced shock wave generation via pre-breakdown acceleration using water electrolysis in negative streamer pulsed spark discharges Open
This paper presents a method for enhancement of shock waves generated from underwater pulsed spark discharges with negative (anode-directed) subsonic streamers, for which the pre-breakdown process is accelerated by preconditioning a gap wi…
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A parametric SPICE model for the simulation of spark gap switches Open
The use of SPICE-based software for the simulation of pulsed power systems—even large complex systems—has become commonplace in the pulsed power community. This is in contrast to earlier work in the field that relied on specially developed…
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Double-propagation mode in short-gap spark discharges driven by HV pulses with sub-ns rise time Open
The object of this study is the investigation of spark discharges ignited by unipolar positive rectangular high voltage (HV) pulses with 200 ps rise time and (15 ± 2) kV amplitude with 3 ns duration full width at half maximum in synthetic …
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Fabricating TiO<sub>2</sub>nanocolloids by electric spark discharge method at normal temperature and pressure Open
In this study, TiO2 nanocolloids were successfully fabricated in deionized water without using suspending agents through using the electric spark discharge method at room temperature and under normal atmospheric pressure. This method was e…
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Study on Characteristic of Multi-spark EDM Method by Using Capacity Coupling Open
In order to obtain higher removal rates, this paper developed a multi-spark EDM method by using a capacity coupling. In this method, the tool electrode was divided into multiple tool electrodes, which were electrically insulated from each …
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Study on the streamer inception characteristics under positive lightning impulse voltage Open
The streamer is the main process in an air gap discharge, and the inception characteristics of streamers have been widely applied in engineering. Streamer inception characteristics under DC voltage have been studied by many researchers, bu…
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Analysis of Zn I emission lines observed during a spark discharge in liquid nitrogen for zinc nanosheet synthesis Open
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Comparison of nanoparticle generation by two plasma techniques: Dielectric barrier discharge and spark discharge Open
\n\tDielectric barrier discharge ( DBD) and spark discharge, two versatile atmospheric pressure plasma-based techniques, have been employed to generate nanoparticles. This study compares the characteristics of metal nanoparticles generated…
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Nonlinear Spark Resistance and Capacitive Circuit Models of Electrostatic Discharge Open
Over the past century, several models of spark discharge have been developed that approximate the effect of a spark channel in a circuit as a nonlinear resistance. In this article, we review the physical derivations of a set of spark model…