Studies on the Penetration of Fuel Spray of Diesel Engine

Wakuri, Yutaro; Fujii, Masaru; AMITANI, Tatsuo; TSUNEYA, Reijiro

doi:10.1299/kikai1938.25.820

Cited by 88 publications

(55 citation statements)

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“…Wakuri et al [15] proposed a spray model based on the momentum theory that air entrained into fuel produces mixed gas together with fuel droplets for the density ratio range 40-60…”

Section: Spray Tip Penetration Modelmentioning

confidence: 99%

Dimethyl ether (DME) spray characteristics in a common-rail fuel injection system

Jin

Bae

2003

Proceedings of the Institution of Mechanical Engineers, Part D:

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The fundamental spray characteristics of dimethyl ether (DME ) and conventional diesel were investigated in a constant-volume vessel pressurized by nitrogen gas. A common-rail fuel injection system was adopted with a sac-type injector. DME and diesel were injected into the chamber at two di erent chamber pressures (atmospheric and 3 MPa) and three di erent injection pressures (25, 40 and 55 MPa) under room temperature condition. A charge coupled device (CCD) camera was employed to capture time series of spray images, so that spray cone angles and penetrations of the DME spray were characterized and compared with those of diesel. For evaluation of the evaporation characteristics, shadowgraphy of the DME spray using an Ar ion laser and an intensi ed charge coupled device (ICCD) camera was adopted, in conjunction with the Mie scattering imaging technique for single-hole spray. Intermittent hesitating DME spray was observed, depending on the injection conditions, and might be due to the unstable force balance inside the common-rail nozzle during the injection period. The macroscopic spray characteristics of the DME in the atmospheric chamber conditions proved to be intrinsic physical properties of the DME, and they became diesel-like under 3 MPa ambient pressure. A higher injection pressure produced a wider vapour phase area while it decreased with higher chamber pressure conditions.

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“…Wakuri et al [15] proposed a spray model based on the momentum theory that air entrained into fuel produces mixed gas together with fuel droplets for the density ratio range 40-60…”

Section: Spray Tip Penetration Modelmentioning

confidence: 99%

Dimethyl ether (DME) spray characteristics in a common-rail fuel injection system

Jin

Bae

2003

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…In order to verify the accuracy of the LIF-PIV measurement and calculation method, a comparison of the instantaneous equivalence ratio u inst and the mean equivalence ratio u mean of the whole spray are taken into account in Figures 10 and 11, respectively. The instantaneous equivalence ratio was calculated from the instantaneous ambient gas and fuel mass flow rate by LIF-PIV results in Figure 10(a) and from the predictive model suggested by Wakuri et al 24 in Figure 10(b). The main equation is given as…”

Section: Methods For Calculating Ambient Gas Mass Flow Ratementioning

confidence: 99%

An investigation of the effects of fuel injection pressure, ambient gas density and nozzle hole diameter on surrounding gas flow of a single diesel spray by the laser-induced fluorescence–particle image velocimetry technique

Zhu

Kuti

Nishida

2012

International Journal of Engine Research

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The characteristics of ambient gas motion induced by a single diesel spray were measured quantitatively by using a laserinduced fluorescence-particle image velocimetry technique under non-evaporating quiescent conditions. The effects of fuel injection pressure, ambient gas density and nozzle hole diameter on the ambient gas mass flow rate into the spray through the whole spray periphery (spray side periphery and tip periphery) were investigated quantitatively according to the gas flow velocity measurements. The results show that the captured gas mass flow rate through the spray tip periphery is prominent in the whole periphery and the proportion of the gas entrainment through the spray side periphery increases with spray development. The higher injection pressure significantly enhances the total gas mass flow rate through the whole periphery; however, the increase in the ratio of ambient gas and fuel mass flow rate becomes moderate gradually with the increase in the injection pressure. The higher ambient gas density results in a slight increase in ambient gas flow velocity along the spray side periphery and the tip periphery and a reduction of the spray volume; however, the ambient gas mass flow rate was apparently enhanced. The smaller nozzle hole diameter results in a significant decrease in the ambient gas mass flow rate and an increase in the ratio of the gas and fuel mass flow rate. Numerical simulation results provide more understanding of the spray-induced gas flow field and validate the measurement accuracy of the laser-induced fluorescence-particle image velocimetry results.

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“…Then Equation (13) is used to compute the mass of fuel that enters the zones numbered 2 to n-3 [30]. The mass of injected fuel that enters zones n-3 to n is considered to be zero in this step.…”

Section: Governing Equationsmentioning

confidence: 99%

Multi-zone model for diesel engine simulation based on chemical kinetics mechanism

Neshat

Honnery

Saray

2017

Applied Thermal Engineering

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Studies on the Penetration of Fuel Spray of Diesel Engine

Cited by 88 publications

References 0 publications

Dimethyl ether (DME) spray characteristics in a common-rail fuel injection system

Dimethyl ether (DME) spray characteristics in a common-rail fuel injection system

An investigation of the effects of fuel injection pressure, ambient gas density and nozzle hole diameter on surrounding gas flow of a single diesel spray by the laser-induced fluorescence–particle image velocimetry technique

Multi-zone model for diesel engine simulation based on chemical kinetics mechanism

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