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, Jingyu; Kuti, Olawole Abiola; Nishida, Keiya

doi:10.1177/1468087412458778

Cited by 26 publications

(18 citation statements)

References 34 publications

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“…Fig. 2 shows the fuel flow rate vs. time under injection pressures of 100, 200 and 300 MPa presented by Zhu et al (2012). Figure 3 shows the comparison of numerical spray droplet cloud under the fuel injection pressure of 100 MPa and two nozzle-wall distances.…”

Section: Fig 1 Schematic View Of the Computational Domainmentioning

confidence: 99%

“…Fuel flow rate can be determined based on fuel and ambient pressure and nozzle diameter through theoretical equations. In addition, experimental data related to the flow rate is presented by Zhu et al (2012). Therefore, in the current study, these values have been used as boundary conditions for the injector.…”

Section: Fig 1 Schematic View Of the Computational Domainmentioning

confidence: 99%

“…The conducted simulations in the present study have been carried out based on the conditions involved in experimental study of Zhu et al (2012). Table 1 shows the fuel specifications and operating conditions.…”

Section: Computational Modelmentioning

confidence: 99%

See 2 more Smart Citations

Particle and Gas Flow Modeling of Wall-impinging Diesel Spray under Ultra-high Fuel Injection Pressures

Ghadimi

Yousefifard

Nowruzi

2017

JAFM

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Advanced models of spray breakup and droplet collision are implemented in OpenFOAM code for comparing the flat-wall impinging and free fuel sprays under ultra-high pressure direct injection diesel engines. The nonevaporating spray and ambient gas flow characteristics are analyzed by a combination of Eulerian and Lagrangian methods for continuous and dispersed phase, respectively. Various injection pressures and two different impinging distances are used. Reynolds Averaged Navier Stokes (RANS) equations are solved using standard k-ε turbulence model. Computational domain and grid size are determined based on a mesh study. Numerical results are validated by published experimental data for free and wall-impinging sprays. The robustness and accuracy of the proposed scheme are confirmed by comparing the main characteristics of spray and surrounding gas against published experimental data. To accomplish this, spray shape, penetration and gas velocity vectors are compared with experimental data and insightful understanding of the spray characteristics are provided. In comparison with free spray, tip penetration has been limited in impinging sprays. Turbulent flow in impinging sprays leads to more induced air motion. Also, impinging spray leads to more pushed-out gas velocity. The obtained results indicate that the numerical findings are generally in good agreement with experimental data in case of ultra-high injection pressures and micro-hole injectors.

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Section: Fig 1 Schematic View Of the Computational Domainmentioning

confidence: 99%

Section: Fig 1 Schematic View Of the Computational Domainmentioning

confidence: 99%

See 1 more Smart Citation

Particle and Gas Flow Modeling of Wall-impinging Diesel Spray under Ultra-high Fuel Injection Pressures

Ghadimi

Yousefifard

Nowruzi

2017

JAFM

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“…PIV spray measurements are described in [195,196]. Zhang et al reported high-speed PIV measurements with 6 kHz using pulsed illumination [197].…”

Section: Application Examples Challenges and Perspectivesmentioning

confidence: 99%

Imaging Flow Velocimetry with Laser Mie Scattering

Fischer

2017

Applied Sciences

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Abstract:Imaging flow velocity measurements are essential for the investigation of unsteady complex flow phenomena, e.g., in turbomachines, injectors and combustors. The direct optical measurement on fluid molecules is possible with laser Rayleigh scattering and the Doppler effect. However, the small scattering cross-section results in a low signal to noise ratio, which hinders time-resolved measurements of the flow field. For this reason, the signal to noise ratio is increased by using laser Mie scattering on micrometer-sized particles that follow the flow with negligible slip. Finally, the ongoing development of powerful lasers and fast, sensitive cameras has boosted the performance of several imaging methods for flow velocimetry. The article describes the different flow measurement principles, as well as the fundamental physical measurement limits. Furthermore, the evolution to an imaging technique is outlined for each measurement principle by reviewing recent advances and applications. As a result, the progress, the challenges and the perspectives for high-speed imaging flow velocimetry are considered.

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“…The e ect of ambient pressure on the penetration of a diesel spray was investigated experimentally and theoretically by Roisman et al [20]. Also, Zhu et al [21] experimentally investigated the e ects of fuel injection pressure, ambient gas density and nozzle hole diameter on the surrounding gas ow of a single diesel spray under ultra-high injection pressures.…”

Section: Introductionmentioning

confidence: 99%

Probing into the Effects of Fuel Injection Pressure and Nozzle Hole Diameter on Spray Characteristics under Ultra-high Injection Pressures Using Advanced Breakup Model

2016

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Abstract. In this article, non-evaporating and non-reacting diesel spray is modeled under ultra-high injection pressure using an Eulerian-Lagrangian scheme. This is accomplished in order to probe into the e ects of injection pressure, nozzle diameter, and ambient density on spray characteristics. An advanced hybrid breakup model that takes into consideration the transient processes during spray injection has been added to the open source code, OpenFOAM. Reynolds-Average Navier-Stokes (RANS) equations are solved using the standard k " turbulence model and the fuel droplet is tracked by a Lagrangian scheme. Published experimental data have been used for validation of spray characteristics at 15 kg/m 3 ambient density and injection pressures of 100, 200 and 300 MPa. Also, three nozzle diameters of 0.08, 0.12 and 0.16 mm have been implemented for investigating the e ect of this parameter on spray formation. Computed spray shape, jet penetration, spray volume, equivalent ratio along the injector axis and Sauter Mean Diameter (SMD) illustrate good agreement with experimental data of a single hole nozzle and symmetric spray. The e ects of fuel injection pressure, nozzle hole diameter and ambient density on main spray parameters are presented. It is concluded that the numerical model presented here is quite suitable for accurately predicting diesel spray shapes under ultra-high injection pressures.

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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

Cited by 26 publications

References 34 publications

Particle and Gas Flow Modeling of Wall-impinging Diesel Spray under Ultra-high Fuel Injection Pressures

Particle and Gas Flow Modeling of Wall-impinging Diesel Spray under Ultra-high Fuel Injection Pressures

Imaging Flow Velocimetry with Laser Mie Scattering

Probing into the Effects of Fuel Injection Pressure and Nozzle Hole Diameter on Spray Characteristics under Ultra-high Injection Pressures Using Advanced Breakup Model

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