Evaporation and mixture formation characteristics of diesel spray under various nozzle hole size and injection pressure condition employing similar injection rate profile

Safiullah,; Nishida, Keiya; Ogata, Youichi

doi:10.1016/j.icheatmasstransfer.2021.105184

Cited by 18 publications

(8 citation statements)

References 25 publications

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“…Further literature about LAS principle, equations and image post-processing could be reviewed. 27–31…”

Section: Methodsmentioning

confidence: 99%

“…The gas pressure inside the chamber was set to 1.4 MPa in order to maintain 16 kg/m 3 gas density. In the current work, ISTA is measured at an axial distance of 1 mm 29 as shown in Figure 7(a) while measured angles of each injector are shown in Figure 7(b). These profiles are used as input in the spray simulation.…”

Section: Methodsmentioning

confidence: 99%

“…Further literature about LAS principle, equations and image post-processing could be reviewed. [27][28][29][30][31] In experiments, the target spray is bothered by a few factors including the adjacent spray plume and chamber's design as shown in Figure 2(a). When post processed, a mask has been created around the periphery of the target spray and only target spray has been deconvoluted.…”

Section: Experimental Approachmentioning

confidence: 99%

“…In this study, the liquid penetration is derived from the liquid phase equivalence ratio that is, the axial distance covered by the liquid fuel with an equivalence ratio ø 1. 28,29 Vapor length is the maximum axial distance of vapor measured from the nozzle tip in the UV image whereas spray angle is the angle made by two lines drawn from the nozzle tip to the half of the vapor penetration length. Furthermore, liquid and vapor equivalence ratios are taken from liquid and vapor concentrations respectively and are expressed in equations ( 7) and ( 8).…”

Section: Macroscopic Characteristicsmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of multi-hole diesel injectors spray under evaporating conditions: Effects of adjacent spray plumes on the macroscopic and mixture characteristics of target spray

Safiullah

Ray

Nishida

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Previously, diesel sprays of multi-hole injectors were simulated in an environment where only a single spray plume was simulated. Although boundaries were declared as symmetry, the impact of aerodynamic forces between spray plumes was always neglected. In the present work, all spray plumes of diesel injectors are simulated in a cylindrical box mesh considering external effects including umbrella angle, space between nozzle holes, and hole length to hole diameter ratio. To examine the nozzle hole size effect, two 10-hole diesel injectors with hole diameters of 0.101 and 0.133 mm are investigated under 120 MPa injection pressure. Likewise, to understand the effect of injection pressure, the 0.101 mm hole diameter injector is studied under 120 and 140 MPa rail pressures. In experiments, Laser Absorption Scattering diagnostic technique is applied to visualize the vapor phase, measure mixture concentration and characterize air entrainment. Since Diesel fuel does not absorb UV light, Tracer fuel with the composition of 97.5% of n-tridecane and 2.5% α-Methylnaphthalene is used. On the contrary, sprays are simulated in the Eulerian-Lagrangian two-phase fluid framework using KHRT Breakup and Multicomponent Evaporation models. Parameters such as injection rate and initial spray trajectory angle are measured experimentally and used as input for the spray simulation. Computational results correspond with experiments particularly in terms of Penetration and Equivalence Ratio while Spray Angle deviates.

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“…Further literature about LAS principle, equations and image post-processing could be reviewed. 27–31…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Experimental Approachmentioning

confidence: 99%

Section: Macroscopic Characteristicsmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of multi-hole diesel injectors spray under evaporating conditions: Effects of adjacent spray plumes on the macroscopic and mixture characteristics of target spray

Safiullah

Ray

Nishida

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

Self Cite

View full text Add to dashboard Cite

show abstract

“…One can see a steady growth of subject-related publications over the last five years (based on ScienceDirect search results). The following aspects of water spray evaporation were considered in these studies: evaporation rate (temperature driving force) [5,7], droplet size distribution [8,14], droplets dispersion (as a result of nozzle design and injection pressure) [8,10,14], injection direction [13,14], spray relative velocity [14] and gas relative humidity [13,14].…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of water spray evaporation in a turbulent air flow

Nikitin

Satonin

2022

J. Phys.: Conf. Ser.

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Water spray evaporation in a hot air flow is a common process for many industrial applications. Spray nozzles should be well adjusted and distributed specifically to achieve efficient evaporation. The present study addressed simulation of the process within the Eulerian-Lagrangian workframe with k-∈ turbulence model. Simulation was carried out via OpenFOAM and postprocessed with ParaView. SprayFOAM solver was used to obtain a solution for 2D and 3D representations of the wind tunnel. Custom JANAF-based approximations were introduced for thermophysical properties of working mediums (air and water vapor). Obtained results were accurate enough to validate the presented model against adopted experimental data. Drift eliminator was modelled with virtual interfaces (baffles), which were tested in two scenarios: accumulating and removing droplets from the computational domain.

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Effects of full transient Injection Rate and Initial Spray Trajectory Angle profiles on the CFD simulation of evaporating diesel sprays- comparison between singlehole and multi hole injectors

Safiullah

Ray

Nishida

et al. 2023

Energy

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Evaporation and mixture formation characteristics of diesel spray under various nozzle hole size and injection pressure condition employing similar injection rate profile

Cited by 18 publications

References 25 publications

Evaluation of multi-hole diesel injectors spray under evaporating conditions: Effects of adjacent spray plumes on the macroscopic and mixture characteristics of target spray

Evaluation of multi-hole diesel injectors spray under evaporating conditions: Effects of adjacent spray plumes on the macroscopic and mixture characteristics of target spray

Numerical simulation of water spray evaporation in a turbulent air flow

Effects of full transient Injection Rate and Initial Spray Trajectory Angle profiles on the CFD simulation of evaporating diesel sprays- comparison between singlehole and multi hole injectors

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