Investigation on the Initial Part and the Spray Formation Delay of Diesel Spray

Ha, Jong-Yul; Hayashi, Akira; Tanabe, Hideaki; Sato, G. Takeshi; Kuniyoshi, Hikaru; Fujimoto, Hajime

doi:10.4271/830451

Cited by 17 publications

(6 citation statements)

References 6 publications

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“…Also, higher injection pressures produced an increment in the spray penetration, related to the bigger momentum of the spray. Many others researches have observed these trends (Bardi et al, 2012;Ha et al, 1983;Naber and Siebers, 1996;Payri et al, 2011). Regarding the spreading angle measurements, increasing the ambient density caused a wider spreading angle, while elevating the injection pressure reduced it ( Figure 6).…”

Section: Resultsmentioning

confidence: 61%

Effect of High Injection Pressures and Ambient Gas Properties Over the Macroscopic Characteristics of the Diesel Spray on Multi-Hole Nozzles

et al. 2018

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In this work, the effect of high injection pressures and ambient gas properties on diesel spray penetration and spreading angle are studied. To this end a multi-hole piezoelectric injector was used, and MIE-Scattering optical technique to visualize the spray. Injection pressures up to 270 MPa were used throughout the experiments. Additionally, the spray behavior going from subsonic to supersonic state was analyzed by controlling the ambient gas speed of sound, promoting in this way supersonic jets. For this purpose, measurements were done using three different ambient gases (SF 6 , CO 2 , and N 2) at isothermal conditions. The results showed that sprays near transonic or in supersonic state had a higher penetration rate than those in subsonic state. Furthermore, among the sprays near transonic or in supersonic state, those with higher Mach number had faster penetration. Differently, within the sprays at subsonic state, no significant variations in spray penetration rate were found, regardless of the difference in the Mach number. Shock waves appearances were pointed out as a possible explanation for the spray penetration variations observed. Finally, a statistical analysis is presented for the spray penetration under isothermal conditions and for each ambient gas.

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Section: Resultsmentioning

confidence: 61%

Effect of High Injection Pressures and Ambient Gas Properties Over the Macroscopic Characteristics of the Diesel Spray on Multi-Hole Nozzles

et al. 2018

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“…influences the liquid length penetration when the volume of control where the combustible is injected at atmospheric conditions. However, when the control volume pressure is high, the influence of this parameter in liquid length penetration decreases, according to investigations made by (Ha et al, 1983) and (Xu & Hiroyasu, 1990). 3.…”

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

confidence: 93%

Liquid Sprays Characteristics in Diesel Engines

Martínez-Martínez¹,

Sanchez²,

Bermúdez³

et al. 2010

Fuel Injection

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“…Some of the recent studies, where typical diesel fuel injection nozzles with LID < 4 were used, showed the spray cone angle to increase with increase in injection pressure and decrease with gas density (Kuniyoshi et al, 1980;Ha et al, 1983). Because of these conflicting observations and the need to study sprays at high injection pressures an experimental study was undertaken to investigate some of the characteristics of fuel sprays, one of them being the spray cone angle.…”

Section: A VImentioning

confidence: 99%

Spray cone angle and its correlation in a high pressure fuel spray

Varde

1985

Can J Chem Eng

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An experimental study was conducted to determine the effects of nozzle orifice size and operating parameters on the cone angle of a liquid fuel spray injected into a gaseous environment. High fuel pressures in the range 55 to 130 MPa and background gas density ranging from atmospheric to 40 kg/m3 were used in the study. The results show the spray cone angle to depend on the orifice dimensions as well as on the operating conditions such as the injection velocity and the background gas density. A correlation is derived to predict spray cone angles in terms of Reynolds and Weber numbers. The predicted results are shown to agree well with the experimental findings of other investigators.

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Investigation on the Initial Part and the Spray Formation Delay of Diesel Spray

Cited by 17 publications

References 6 publications

Effect of High Injection Pressures and Ambient Gas Properties Over the Macroscopic Characteristics of the Diesel Spray on Multi-Hole Nozzles

Effect of High Injection Pressures and Ambient Gas Properties Over the Macroscopic Characteristics of the Diesel Spray on Multi-Hole Nozzles

Liquid Sprays Characteristics in Diesel Engines

Spray cone angle and its correlation in a high pressure fuel spray

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