SC4-2: Imaging of the Flow and Cavitation Formation in a Transparent Real-Size Six-Hole Nozzle under Realistic Conditions(SC: Spray and Spray Combustion,General Session Papers)

Liverani, Luca; Arcoumanis, C.; Yanagihara, Hiromichi; Sakata, Ichiro; Omae, Kazuhiro

doi:10.1299/jmsesdm.2008.7.453

Cited by 2 publications

(2 citation statements)

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“…The details of the experimental test rig and injector set up utilised in the present study are described thoroughly in [31] while a schematic of the modified nozzle employed here is illustrated in figure 1(a). As the structural strength of Perspex in compression is limited, a suitable force able of providing sealing to fuel pressures up to 500 bar has been utilised; unfortunately, this prevented experiments to be performed at higher pressures.…”

Section: Experimental Set Up and Techniquementioning

confidence: 99%

Instantaneous and ensemble average cavitation structures in Diesel micro-channel flow orifices

Mitroglou

McLorn

Gavaises

et al. 2014

Fuel

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Section: Experimental Set Up and Techniquementioning

confidence: 99%

Instantaneous and ensemble average cavitation structures in Diesel micro-channel flow orifices

Mitroglou

McLorn

Gavaises

et al. 2014

Fuel

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“…Not many studies have been done to understand the transient behavior of flow inside the nozzle and the sac volume during the motion of the needle and at the end of injection (EOI). Liverani et al 16 studied the flow inside a real-size glass nozzle with optical access to the sac volume and holes, with high spatial and temporal resolution. They observed that low needle lift enhanced turbulence and vorticity, which increased the vapor volume fraction due to cavitation.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of purging of a gasoline direct injection nozzle at the end of injection

Mouvanal

Burkhardt

Bakshi

et al. 2020

International Journal of Engine Research

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In gasoline direct injection engines, fuel injector nozzle is one of the vital components that determine the efficiency of fuel atomization which controls combustion and emission. There is an increased focus on developing better nozzles by studying the internal flow behavior especially during the needle transient phase and at the end of injection phase. Multiphase flow characteristics involving cavitation and hydraulic flip are observed inside the nozzle during its operation. At the end of injection, fuel inside the nozzle sac and nozzle holes is purged with the gas from the engine cylinder. The efficiency of this purging process is critical to prevent the carbon deposit formation on the wall of nozzle holes and on the surface of the nozzle tip. In this article, a numerical method is presented to predict the internal nozzle flow during the needle movement and during the end of injection to predict the purging capacity of a gasoline direct injection nozzle. Needle motion is accomplished using a moving mesh method via a user-defined function. The numerical model is compared with the X-ray measurements from the literature. Based on the validated model, the study is extended to analyze various parameters like injection pressure, nozzle hole location, number of nozzle holes and the inlet rounding of the nozzle hole which affects the effectiveness of nozzle purging. Fuel wetting at the nozzle tip after the end of injection is also numerically modeled to evaluate the thickness profile of the thin liquid film.

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SC4-2: Imaging of the Flow and Cavitation Formation in a Transparent Real-Size Six-Hole Nozzle under Realistic Conditions(SC: Spray and Spray Combustion,General Session Papers)

Cited by 2 publications

References 0 publications

Instantaneous and ensemble average cavitation structures in Diesel micro-channel flow orifices

Instantaneous and ensemble average cavitation structures in Diesel micro-channel flow orifices

Numerical study of purging of a gasoline direct injection nozzle at the end of injection

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