Measurement of Liquid Phase Penetration of vaporating Spray in a DI Diesel Engine

Zhang, Long; Tsurushima, Tadashi; Ueda, Takahiro; Ishii, Yoshinori; Itou, T.; Minami, Toshitaka; Yokota, Katsuhiko

doi:10.4271/971645

Cited by 19 publications

(12 citation statements)

References 8 publications

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“…To define this zone the use of diverse measurements methods and techniques is of vital importance. In the literature we find some of the most useful measurement methods and techniques in the analysis of the liquid length, (Hiroyasu & Arai, 1990), (Chehroudi et al, 1985), (Arai et al, 1984), (Nishida et al, 1992), (Gülder et al, 1992), (Christoph & Dec, 1995), (Zhang et al, 1997) and (Bermúdez et al, 2002(Bermúdez et al, , 2003.…”

Section: Liquid Lengthmentioning

confidence: 99%

“…Working fluid temperature (Tg): working fluid temperature is one of the thermodynamic properties that strongly affect liquid length penetration, since the rate of combustible vaporization is directly related to the energy content of the working fluid in the inside of the cylinder (e.g., high temperatures) and in the degree of the mixture of both fluids (injected fuel-gas or air) (Christoph & Dec, 1995). However, working fluid temperature has no relevant effect at high pressure injection because both, an increase in the speed of injection and the amount of fuel injected, ease the effect with respect of low pressures, (Zhang et al, 1997). An increase in working fluid temperature at constant density causes and increase in the specific energy of the latter and therefore a decrease in liquid length during spray penetration is a consequence of high drag of vaporization energy towards the fuel, (Siebers, 1999).…”

Section: The Relationship Between Length/nozzle Diameter (L O /D O ):mentioning

confidence: 99%

See 1 more Smart Citation

Liquid Sprays Characteristics in Diesel Engines

Martínez-Martínez¹,

Sanchez²,

Bermúdez³

et al. 2010

Fuel Injection

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Section: Liquid Lengthmentioning

confidence: 99%

Section: The Relationship Between Length/nozzle Diameter (L O /D O ):mentioning

confidence: 99%

Liquid Sprays Characteristics in Diesel Engines

Martínez-Martínez¹,

Sanchez²,

Bermúdez³

et al. 2010

Fuel Injection

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“…However, little literature can be found concerning this factor since most of the authors have focused on the influence of other parameters such as nozzle length, diameter, rounding, hole angle or sac geometry (Corcicone et al, 1991;Greeves and Tullis, 1993;Hiroyasu and Arai, 1990;Kato et al, 1998;Knox-Kelecy and Farrell, 1993;Pierpont and Reitz, 1995;Su et al, 1995a,b;Zhang et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

The effects of injector hole convergence on diesel combustion and emissions

Payri¹,

Benajes²,

Gonzalez³

et al. 2004

IJVD

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The influence of different nozzle hole geometries in diesel spray behaviour and emissions was studied. Two multiple-hole nozzles, with different convergence ratios, were tested in an injection test rig and in a single cylinder engine. The nozzle hole diameter was changed but the injection pressure and mass flux were kept fairly constant. The tests in cold conditions were carried out with two different ambient pressures in order to obtain data from penetration and spray angle. Emission results are exhibited in terms of brake specific fuel consumption, dry soot and nitrogen oxides. Additional data from the cylinder conditions such as the burnt products' temperature and the heat release rate were obtained. Convergent nozzles presented a higher penetration rate, but a narrower spray angle. In terms of combustion, findings showed little difference in fuel consumption for both nozzles; nevertheless, for the tested conditions divergent nozzles exhibited worse mixing rates than the convergent ones.

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“…Thus, the actual value of liquid-phase internal energy is calculated at a given droplet temperature T by (5) When fuel density is not constant [see Eq. (1)], liquid internal energy does not depend on temperature only, but is also affected by the local value of pressure.…”

Section: Numerical Modelsmentioning

confidence: 99%

“…Therefore, parcels which have different temperature and different pressure have, in the original code, the same density. Many researchers have found [1][2][3][4][5][6] that fuel density influences the structure and the evolution of sprays by affecting tip penetration, spray angle, and vaporization rate.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Investigation on Variable-Density Sprays

2002

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The aim of the present investigation is the analysis of the influence of liquid-fuel compressibility on the simulation of sprays produced by high-pressure injection systems. Two different equations have been introduced in the KIVA3V code to calculate liquid-phase density. The first one determines fuel density by using a second-order function of drop temperature and pressure, while the second one also takes into account the quantity of air dissolved in the fuel. Breakup, vaporization, and collision models as well as the energy, momentum, and air-spray mass exchange equations were modified so that each droplet would have a different density, according to its position and evolution.A comparison between experimental and numerical data for sprays injected in a constant-volume vessel at ambient temperature and pressure has been carried out to test the practical capability of the modified KIVA3V subroutines. The predicted and measured results of penetration versus time and drop size distribution showed good agreement. An in-depth study of the influence of gas temperature on the droplet vaporization rate has been performed for a single droplet and for sprays injected in a high-temperature, medium-pressure, constant-volume chamber. The effect of fuel density variability on vaporizing noncombusting sprays has been investigated for both models. The air dissolved in the fuel was found to affect liquid-phase density only at low ambient pressure.Finally, the experimental data measured on a small-bore diesel engine have been used to verify the provisional capabilities of constant-and variable-density models. NO and soot predictions have shown to be dependent on the model used for liquid-phase density.

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Measurement of Liquid Phase Penetration of vaporating Spray in a DI Diesel Engine

Cited by 19 publications

References 8 publications

Liquid Sprays Characteristics in Diesel Engines

Liquid Sprays Characteristics in Diesel Engines

The effects of injector hole convergence on diesel combustion and emissions

Theoretical Investigation on Variable-Density Sprays

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