High pressure thermophysical characterization of fuel used for testing and calibrating diesel injection systems

Ndiaye, El Hadji Ibrahima; Bazile, Jean-Patrick; Nasri, Djamel; Boned, Christian; Daridon, Jean-Luc

doi:10.1016/j.fuel.2012.04.005

Cited by 40 publications

(23 citation statements)

References 28 publications

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“…The comparisons show good agreement of the experimental data with the theoretical values, with a 0.5 % maximum deviation, which highlights the validity of the methodology implemented to determine diesel fuel densities. The evolution of the density with the temperature and pressure is as expected from previous works [2,5,13,14]: it increases when the pressure increases, and decreases when the temperature increases. Figure 11.…”

Section: Density Determinationsupporting

confidence: 84%

“…This validates the speed of sound facility and the calibration performed with n-Dodecane. The evolution of the speed of sound with the temperature and pressure is as expected from previous works [2,5,13,14,20]: it increases when the pressure increases, and decreases when the temperature increases. It is also important to state that the dependency with the temperature is nearly linear, whereas the pressure dependency shows a different behavior.…”

Section: Speed Of Sound Testssupporting

confidence: 84%

“…More specifically, the properties that affect the performance of diesel injection systems include but are not limited to speed of sound, density, viscosity and bulk modulus [2,3,4,5].…”

Section: Introductionmentioning

confidence: 99%

“…The fuel properties stated before present an important dependence on pressure and temperature, as several authors have reported [2,5,13,14,15]. However, most of the studies report data either for relatively low pressures, or for fluids different than diesel fuels.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Experimental Characterization of the Thermodynamic Properties of Diesel Fuels Over a Wide Range of Pressures and Temperatures

Desantes¹,

Salvador²,

Carreres³

et al. 2015

SAE Int. J. Fuels Lubr.

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The influence of pressure and temperature on some of the important thermodynamic properties of diesel fuels has been assessed for a set of fuels. The study focuses on the experimental determination of the speed of sound, density and compressibility (via the bulk modulus) of these fuels by means of a method that is thoroughly described in this paper. The setup makes use of a common-rail injection system in order to transmit a pressure wave through a high-pressure line and measure the time it takes for the wave to travel a given distance. Measurements have been performed in a wide range of pressures (from atmospheric pressure up to 200 MPa) and temperatures (from 303 to 353 K), in order to generate a fuel properties database for modelers on the field of injection systems for diesel engines to incorporate to their simulations.

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Section: Density Determinationsupporting

confidence: 84%

Section: Speed Of Sound Testssupporting

confidence: 84%

“…More specifically, the properties that affect the performance of diesel injection systems include but are not limited to speed of sound, density, viscosity and bulk modulus [2,3,4,5].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Characterization of the Thermodynamic Properties of Diesel Fuels Over a Wide Range of Pressures and Temperatures

Desantes¹,

Salvador²,

Carreres³

et al. 2015

SAE Int. J. Fuels Lubr.

View full text Add to dashboard Cite

show abstract

“…This particular work was chosen due to the use of ISO 4113 as the test fuel (i.e. equations of state and experimentally determined fluid properties are available, see [22] and [23]) and the fact that their results include visualization of instantaneous pressure waves, turbulence and cavitation, all of which are expected to be present in the current study [13]. The simulation for the validation cases was run for the Mauger test cases with a pressure drop across the channel of ΔP = 26.8 bar, ΔP = 31.4 bar and ΔP = 35 bar.…”

mentioning

confidence: 99%

Near Nozzle Field Conditions in Diesel Fuel Injector Testing

Pearce

Hardalupas

Taylor

2015

SAE Technical Paper Series

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The measurement of the rate of fuel injection using a constant volume, fluid filled chamber and measuring the pressure change as a function of time due to the injected fluid (the so called "Zeuch" method) is an industry standard due to its simple theoretical underpinnings. Such a measurement device is useful to determine key timing and quantity parameters for injection system improvements to meet the evolving requirements of emissions, power and economy. This study aims to further the understanding of the nature of cavitation which could occur in the near nozzle region under these specific conditions of liquid into liquid injection using high pressure diesel injectors for heavy duty engines. The motivation for this work is to better understand the temporal signature of the pressure signals that arise in a typical injection cycle.A preliminary CFD study was performed, using OpenFOAM, with a transient (Large Eddy Simulation -LES), multiphase solver using the homogenous equilibrium model for the compressibility of the liquid/ vapour. The nozzle body was modelled for simplicity without the nozzle needle using a nozzle hole of 200μm diameter and the body pressurised to values typical for common rail engines. Temperature effects were neglected and the wall condition assumed to be adiabatic. The chamber initial static pressure was varied between 10 and 50 bar to reflect typical testing conditions.Results indicate that vapour formation could occur in areas 10-30mm distant from the nozzle itself. The cavitation was initiated around 100 μs after the jet had started for low ΔP cases and followed the development period required for the formation of vortices associated with the vortex roll up of this jet. These vortices had localised sites, in their core region, below the vapour pressure and were convected downstream of their initial formation location. It was also found that vapour formation could occur at chamber static pressures up to 50 bar (the highest tested) due to cavitation in the shear layer and this vortex effect. The pressure signal received at the chamber would therefore be more difficult to interpret with additional error components. IntroductionFuel injectors are under constant scrutiny as one of the prime factors in governing the overall efficiency and emissions output from heavy duty diesel engines. Manufacturers of fuel systems are therefore pursuing increasingly challenging targets for the accurate quantification of the instantaneous mass flow rate and total fuel quantity delivered. The characteristics of the fuel delivered such as the time rate of change of mass flow for a given pressure differential (i.e. rail pressure) are as important as the total quantity delivered for a given "shot". The rate of change of fuel mass flow is an important consideration to engine developers as it allows more complex combustion strategies that can be tailored for a given engine configuration and application [1,2]. This 'rate shaping' is a useful tool in order to gain the incremental improvements of combustion that...

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Thermophysical properties of rapeseed oil methyl esters (RME) at high pressures and various temperatures evaluated by ultrasonic methods

Kiełczyński

Ptasznik

Szalewski

et al. 2017

Biomass and Bioenergy

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High pressure thermophysical characterization of fuel used for testing and calibrating diesel injection systems

Cited by 40 publications

References 28 publications

Experimental Characterization of the Thermodynamic Properties of Diesel Fuels Over a Wide Range of Pressures and Temperatures

Experimental Characterization of the Thermodynamic Properties of Diesel Fuels Over a Wide Range of Pressures and Temperatures

Near Nozzle Field Conditions in Diesel Fuel Injector Testing

Thermophysical properties of rapeseed oil methyl esters (RME) at high pressures and various temperatures evaluated by ultrasonic methods

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