Numerical analysis of deposit effect on nozzle flow and spray characteristics of GDI injectors

Research output: Contribution to journalArticlepeer-review

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Numerical analysis of deposit effect on nozzle flow and spray characteristics of GDI injectors. / Wang, Bo; Jiang, Yizhou; Hutchins, Peter; Badawy, Tawfik; Xu, Hongming; Zhang, Xinyu; Rack, Alexander; Tafforeau, Paul.

In: Applied Energy, Vol. 204, 15.10.2017, p. 1215-1224.

Research output: Contribution to journalArticlepeer-review

Harvard

Wang, B, Jiang, Y, Hutchins, P, Badawy, T, Xu, H, Zhang, X, Rack, A & Tafforeau, P 2017, 'Numerical analysis of deposit effect on nozzle flow and spray characteristics of GDI injectors', Applied Energy, vol. 204, pp. 1215-1224. https://doi.org/10.1016/j.apenergy.2017.03.094

APA

Wang, B., Jiang, Y., Hutchins, P., Badawy, T., Xu, H., Zhang, X., Rack, A., & Tafforeau, P. (2017). Numerical analysis of deposit effect on nozzle flow and spray characteristics of GDI injectors. Applied Energy, 204, 1215-1224. https://doi.org/10.1016/j.apenergy.2017.03.094

Vancouver

Author

Wang, Bo ; Jiang, Yizhou ; Hutchins, Peter ; Badawy, Tawfik ; Xu, Hongming ; Zhang, Xinyu ; Rack, Alexander ; Tafforeau, Paul. / Numerical analysis of deposit effect on nozzle flow and spray characteristics of GDI injectors. In: Applied Energy. 2017 ; Vol. 204. pp. 1215-1224.

Bibtex

@article{50be6abdf52b452cb2a3814c3f467f3d,
title = "Numerical analysis of deposit effect on nozzle flow and spray characteristics of GDI injectors",
abstract = "Injector deposit is a common phenomenon for gasoline direct ignition (GDI) engines that greatly affects the spray behavior and consequently the combustion performance and emissions. In this study, the effect of deposit on both the in-nozzle flow dynamics and downstream spray behaviors was numerically investigated. High-resolution X-ray microtomographic scans were performed first to obtain nozzle and deposit morphologies and topology. In-nozzle simulation was then carried out in the Euler-Euler framework with cavitation taken into account by a homogeneous relaxation model (HRM). Finally, the effect of deposit on spray behaviors was evaluated in the Euler-Lagrangian framework, coupled with the in-nozzle simulation results. Results of the nozzle flow simulations highlight that the rough surface of the deposits leads to additional cavitation inception and restricts the flow area, causing mass flow rate losses. Deposits inside the counterbore act as an extension to the inner orifice and constrain the air recirculation. Turbulent levels at the exit of the counterbore are lower for the coked injector due to the reduced air/fuel interaction. Spray simulations have shown that deposits would lead to longer spray penetration, a smaller spray cone angle and larger droplets diameters. Simulation results agree reasonably well with the available experimental data.",
keywords = "Cavitation, CFD, Deposit, GDI, Nozzle, X-ray",
author = "Bo Wang and Yizhou Jiang and Peter Hutchins and Tawfik Badawy and Hongming Xu and Xinyu Zhang and Alexander Rack and Paul Tafforeau",
year = "2017",
month = oct,
day = "15",
doi = "10.1016/j.apenergy.2017.03.094",
language = "English",
volume = "204",
pages = "1215--1224",
journal = "Applied Energy",
issn = "0306-2619",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Numerical analysis of deposit effect on nozzle flow and spray characteristics of GDI injectors

AU - Wang, Bo

AU - Jiang, Yizhou

AU - Hutchins, Peter

AU - Badawy, Tawfik

AU - Xu, Hongming

AU - Zhang, Xinyu

AU - Rack, Alexander

AU - Tafforeau, Paul

PY - 2017/10/15

Y1 - 2017/10/15

N2 - Injector deposit is a common phenomenon for gasoline direct ignition (GDI) engines that greatly affects the spray behavior and consequently the combustion performance and emissions. In this study, the effect of deposit on both the in-nozzle flow dynamics and downstream spray behaviors was numerically investigated. High-resolution X-ray microtomographic scans were performed first to obtain nozzle and deposit morphologies and topology. In-nozzle simulation was then carried out in the Euler-Euler framework with cavitation taken into account by a homogeneous relaxation model (HRM). Finally, the effect of deposit on spray behaviors was evaluated in the Euler-Lagrangian framework, coupled with the in-nozzle simulation results. Results of the nozzle flow simulations highlight that the rough surface of the deposits leads to additional cavitation inception and restricts the flow area, causing mass flow rate losses. Deposits inside the counterbore act as an extension to the inner orifice and constrain the air recirculation. Turbulent levels at the exit of the counterbore are lower for the coked injector due to the reduced air/fuel interaction. Spray simulations have shown that deposits would lead to longer spray penetration, a smaller spray cone angle and larger droplets diameters. Simulation results agree reasonably well with the available experimental data.

AB - Injector deposit is a common phenomenon for gasoline direct ignition (GDI) engines that greatly affects the spray behavior and consequently the combustion performance and emissions. In this study, the effect of deposit on both the in-nozzle flow dynamics and downstream spray behaviors was numerically investigated. High-resolution X-ray microtomographic scans were performed first to obtain nozzle and deposit morphologies and topology. In-nozzle simulation was then carried out in the Euler-Euler framework with cavitation taken into account by a homogeneous relaxation model (HRM). Finally, the effect of deposit on spray behaviors was evaluated in the Euler-Lagrangian framework, coupled with the in-nozzle simulation results. Results of the nozzle flow simulations highlight that the rough surface of the deposits leads to additional cavitation inception and restricts the flow area, causing mass flow rate losses. Deposits inside the counterbore act as an extension to the inner orifice and constrain the air recirculation. Turbulent levels at the exit of the counterbore are lower for the coked injector due to the reduced air/fuel interaction. Spray simulations have shown that deposits would lead to longer spray penetration, a smaller spray cone angle and larger droplets diameters. Simulation results agree reasonably well with the available experimental data.

KW - Cavitation

KW - CFD

KW - Deposit

KW - GDI

KW - Nozzle

KW - X-ray

UR - http://www.scopus.com/inward/record.url?scp=85017363484&partnerID=8YFLogxK

U2 - 10.1016/j.apenergy.2017.03.094

DO - 10.1016/j.apenergy.2017.03.094

M3 - Article

AN - SCOPUS:85017363484

VL - 204

SP - 1215

EP - 1224

JO - Applied Energy

JF - Applied Energy

SN - 0306-2619

ER -