Large-Eddy Simulation on the Effects of Fuel Injection Pressure on the Gasoline Spray Characteristics

Wadekar, Sandip; Yamaguchi, Akichika; Oevermann, Michael

doi:10.4271/2019-01-0060

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…In addition, injection rate measurements and the phase doppler interferometry measurements were performed to obtain fuel mass flow rates and droplet size distributions at individual injection pressures, respectively. More details about the measurement configuration can be found in Yamaguchi et al (2019), Wadekar et al (2019).…”

Section: Particle Image Velocimetry Set-upmentioning

confidence: 99%

Large-Eddy Simulation Study of Ultra-High Fuel Injection Pressure on Gasoline Sprays

Wadekar

Yamaguchi

Oevermann

2020

Flow Turbulence Combust

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The development of gasoline spray at ultra-high injection pressures was analyzed using Large-Eddy simulation (LES). Two different nozzle hole geometries, divergent and convergent shape, were considered to inject the fuel at injection pressures ranging from 200 to 1500 bar inside a constant volume spray chamber maintained at atmospheric conditions. The discrete droplet phase was treated using a Lagrangian formulation together with the standard spray sub-models. The numerical results were calibrated by reproducing experimentally observed liquid penetration length and efforts were made to understand the influence of ultra-high injection pressures on the spray development. The calibrated model was then used to investigate the impact of ultra-high injection pressures on mean droplet size and droplet size distribution. In addition, the spray-induced large-scale eddies and entrainment rate were evaluated at different ultra-high injection pressures. Overall, simulation results showed a good agreement with available measurement data. At ultra-high injection pressures mean droplet sizes were significantly reduced and comprised very high velocities. Integral length scales of spray-induced turbulence and air entrainment rate into the spray were larger at higher injection pressure compared to lower ones. Graphic abstract

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Section: Particle Image Velocimetry Set-upmentioning

confidence: 99%

Large-Eddy Simulation Study of Ultra-High Fuel Injection Pressure on Gasoline Sprays

Wadekar

Yamaguchi

Oevermann

2020

Flow Turbulence Combust

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Investigation of Influence of Injection Pressure on Gasoline Fuel Spray Characteristics Using Numerical Simulation

Wadekar

2019

Energy, Environment, and Sustainability

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Investigation on Film Formation Characteristics of Pressure-Swirl Nozzle

Chang

Yang

2021

Coatings

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The film formation during the spray/wall impingement has attracted more attention. The present study investigated the film formation characteristics of the pressure-swirl nozzle by applying the contact-free optical method. According to experimental results, the impingement distance had a slightly more significant effect on the actual spray angle than the mass flow rate, and the maximum changing value was 34.6°. The bulge at the center of the surface became insignificant with the impingement distance. The liquid film was divided into the raised zone, annular zone, and free flow zone. The maximum time-average thickness at the central position was 2.84 mm, and correlations for predicting the time-average thickness and surface roughness were fitted. The time-average thickness of the annular zone was 0.38–0.59 mm, relatively thinner than other zones. When the impingement distance was lower than 10 mm, the time-average film thickness and surface roughness in the annular zone and free flow zone decreased first and then increased with the impingement distance. However, effects of mass flow rates and impingement distance on the liquid film were negligible when the impingement distance was higher than 10 mm. The experimental findings are helpful to fundamentally understand the film formation during the spray/wall impingement.

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Large-Eddy Simulation on the Effects of Fuel Injection Pressure on the Gasoline Spray Characteristics

Abstract: Large-eddy simulation on the effects of fuel injection pressure on gasoline spray characteristics SANDIP WADEKAR

Cited by 4 publications

References 31 publications

Large-Eddy Simulation Study of Ultra-High Fuel Injection Pressure on Gasoline Sprays

Large-Eddy Simulation Study of Ultra-High Fuel Injection Pressure on Gasoline Sprays

Investigation of Influence of Injection Pressure on Gasoline Fuel Spray Characteristics Using Numerical Simulation

Investigation on Film Formation Characteristics of Pressure-Swirl Nozzle

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