A Novel Injection System for Combustion Engines Based on Electrostatic Fuel Atomization

Leuteritz, Uwe; Velji, Amin; Bach, Ernstwendelin

doi:10.4271/2000-01-2041

Cited by 9 publications

(4 citation statements)

References 6 publications

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“…Research elsewhere [11,12] has demonstrated experimentally the feasibility of applying electrostatic atomization to transient sprays of electrically insulating liquids in fuel injectors of diesel engines. Bellan and Harstad [13] investigated the effect of electric charge upon the evaporation rate of a cluster of drops embedded in a single vortex.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of electrically charged transient evaporating sprays

Shrimpton

Laoonual

2006

Numerical Meth Engineering

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SUMMARYThe evolution of an evaporating spray plume typical of those under consideration for use in direct injection spark ignition (DISI) engines, for early and late fuel injection strategies is investigated. Here the effect of electric charge, present on individual drops, upon the spray dispersal and evaporation rate is investigated with the aim of optimizing these parameters with respect to typical engine timescales and injection strategy. The predictions suggest that applying electric charge to drops in sprays injected early into the intake stroke does not have a beneficial effect. The spray evaporation rate is not significantly enhanced, and the long time interval between fuel injection and ignition actually promotes spray wall deposition. Conversely, applying electric charge to sprays injected late encourages secondary atomization and the increase in surface area greatly improves the evaporation rate. This is also true at higher engine speeds, corresponding to a much reduced time between fuel injection and ignition. Therefore it is suggested that the selective use of electric charge is viable way of tuning the spray character without effecting fuel metering when moving from an early to a late injection strategy in DISI engines when variable loads are required.

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Section: Introductionmentioning

confidence: 99%

Dynamics of electrically charged transient evaporating sprays

Shrimpton

Laoonual

2006

Numerical Meth Engineering

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“…The conventional configuration [4,5,6] for Electrostatic Atomisation when applied to dielectric fluids such as hydrocarbons, like gasoline or diesel, consists of a single sharp pointed electrode located above a single orifice, as shown in Fig. 3.…”

Section: Figure 2 Electrostatic Spraying Of Water In 18 Thmentioning

confidence: 99%

A Novel Approach to Port Fuel Atomization Using a Very Low Power Multi-Holed Micro Atomizer

Allen¹,

Ravenhill²

2005

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Small gasoline IC engines worldwide are facing new emission legislations, manufactures are seeking low cost and low power consumption fuel control technologies to reduce their engine-out emissions. This paper presents details of the design of a novel multi-holed electrostatic port atomiser using an array of micron-sized orifices, achieving spray droplet diameters less than 40µm SMD, achieved with low pressure (<2.0bar) fuel systems and power consumption levels of only milliwatts. Results from research studies and development tests will demonstrate the atomisation capabilities of this electrostatic atomiser and its possible application to IC engines..

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“…Recent developments have been made to electrostatically atomize industrial hydrocarbon fuels using the charge injection principle of Kelly [4]. This involves passing the liquid through a high-intensity localized field generated between a sharp high-voltage electrode tip and the earthed body of an atomizer to achieve fine atomization [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

On simulations investigating droplet diameter–charge distributions in electrostatically atomized dielectric liquid sprays

Amine-Eddine

Shrimpton

2013

Numerical Methods in Fluids

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SUMMARYA general procedure has been developed for the simulation of charged liquid and electrostatically atomized sprays. The procedure follows a Lagrangian approach for simulation of spray droplets and a Eulerian approach for gas‐phase variables, including the electric field generated by the charge presence on droplets. Validation of the procedure was examined through simulations of previously published charged spray experiments. Results showed that for the specification of initial droplet charge, modelling the droplet charge–diameter relationship through a scaling law is as reliable a method as using a directly obtained charge–diameter relationship from experimental measurements. The normalized root‐mean‐square errors for sprays using the two methods were shown to be within 12% of one another, for the prediction of spatially averaged profiles of mean droplet diameters, mean axial velocities and mean radial droplet velocities. Results showed that the general spatial characteristics and dynamics of a charged liquid spray can successfully be reproduced, including the axial and radial dispersal pattern of droplets and the distribution of mean droplet diameters throughout the spray plume. For all sprays with droplet charges defined through a scaling law relationship, the normalized root‐mean‐square errors range from 9.0% to 31.6% for mean droplet diameters, 10.4% to 67.9% for mean axial droplet velocities and 16.8% to 38.6% for mean radial droplet velocities. Lastly, we present a brief set of general recommendations for simulating electrostatically atomized dielectric liquid sprays.Copyright © 2013 John Wiley & Sons, Ltd.

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A Novel Injection System for Combustion Engines Based on Electrostatic Fuel Atomization

Cited by 9 publications

References 6 publications

Dynamics of electrically charged transient evaporating sprays

Dynamics of electrically charged transient evaporating sprays

A Novel Approach to Port Fuel Atomization Using a Very Low Power Multi-Holed Micro Atomizer

On simulations investigating droplet diameter–charge distributions in electrostatically atomized dielectric liquid sprays

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