iCharacteristics of Trans-Critical Propane Spray Discharged from Multi-Hole GDI Injector

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iCharacteristics of Trans-Critical Propane Spray Discharged from Multi-Hole GDI Injector. / Zhang, Zhou; Li, Yanfei; Ma, Xiao; Ding, Haichun; Xu, Hongming; Wang, Zhi; Shuai, Shijin.

In: Experimental Thermal and Fluid Science, 21.07.2018.

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@article{7a3bb3fbd85c43ee9eb662301b85ac24,
title = "iCharacteristics of Trans-Critical Propane Spray Discharged from Multi-Hole GDI Injector",
abstract = "This paper is to investigate the characteristics of trans-critical propane spray compared with the flash boiling spray ejected from a multi-hole injector in a constant volume chamber by using the Schlieren and backlit imaging methods. The fuel temperature (Tf) is set from 30 °C to 120 °C, injection pressure (pf) from 60 bar to 120 bar and ambient pressure (pa) from 0.2 bar to 10 bar.The results show that the trans-critical spray has longer vapor penetration and shorter liquid penetration than the flash boiling spray, but those two sprays have similar curve liquid boundaries near the nozzle. Several discernable collapsed shock structures near the nozzle are observed at Tf=120 °C, pf=120 bar, pa=1 bar, but they disappear when pf drops to 60 bar for the transition path may not enter the two-phase region, and the liquid phase hardly occurs. The Mach disk distance of trans-critical spray in this study is larger than that of the under-expanded ideal gas jet because of the collapse phenomenon. At Tf=120 °C, pf=120 bar, the liquid length decreases when paincreases from 0.2 bar to 2.5 bar and increases when pa continues to rise.",
keywords = "Propane, Trans-critical spray, GDI, Thermodynamic path",
author = "Zhou Zhang and Yanfei Li and Xiao Ma and Haichun Ding and Hongming Xu and Zhi Wang and Shijin Shuai",
year = "2018",
month = jul,
day = "21",
doi = "10.1016/j.expthermflusci.2018.07.025",
language = "English",
journal = "Experimental Thermal and Fluid Science",
issn = "0894-1777",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - iCharacteristics of Trans-Critical Propane Spray Discharged from Multi-Hole GDI Injector

AU - Zhang, Zhou

AU - Li, Yanfei

AU - Ma, Xiao

AU - Ding, Haichun

AU - Xu, Hongming

AU - Wang, Zhi

AU - Shuai, Shijin

PY - 2018/7/21

Y1 - 2018/7/21

N2 - This paper is to investigate the characteristics of trans-critical propane spray compared with the flash boiling spray ejected from a multi-hole injector in a constant volume chamber by using the Schlieren and backlit imaging methods. The fuel temperature (Tf) is set from 30 °C to 120 °C, injection pressure (pf) from 60 bar to 120 bar and ambient pressure (pa) from 0.2 bar to 10 bar.The results show that the trans-critical spray has longer vapor penetration and shorter liquid penetration than the flash boiling spray, but those two sprays have similar curve liquid boundaries near the nozzle. Several discernable collapsed shock structures near the nozzle are observed at Tf=120 °C, pf=120 bar, pa=1 bar, but they disappear when pf drops to 60 bar for the transition path may not enter the two-phase region, and the liquid phase hardly occurs. The Mach disk distance of trans-critical spray in this study is larger than that of the under-expanded ideal gas jet because of the collapse phenomenon. At Tf=120 °C, pf=120 bar, the liquid length decreases when paincreases from 0.2 bar to 2.5 bar and increases when pa continues to rise.

AB - This paper is to investigate the characteristics of trans-critical propane spray compared with the flash boiling spray ejected from a multi-hole injector in a constant volume chamber by using the Schlieren and backlit imaging methods. The fuel temperature (Tf) is set from 30 °C to 120 °C, injection pressure (pf) from 60 bar to 120 bar and ambient pressure (pa) from 0.2 bar to 10 bar.The results show that the trans-critical spray has longer vapor penetration and shorter liquid penetration than the flash boiling spray, but those two sprays have similar curve liquid boundaries near the nozzle. Several discernable collapsed shock structures near the nozzle are observed at Tf=120 °C, pf=120 bar, pa=1 bar, but they disappear when pf drops to 60 bar for the transition path may not enter the two-phase region, and the liquid phase hardly occurs. The Mach disk distance of trans-critical spray in this study is larger than that of the under-expanded ideal gas jet because of the collapse phenomenon. At Tf=120 °C, pf=120 bar, the liquid length decreases when paincreases from 0.2 bar to 2.5 bar and increases when pa continues to rise.

KW - Propane

KW - Trans-critical spray

KW - GDI

KW - Thermodynamic path

U2 - 10.1016/j.expthermflusci.2018.07.025

DO - 10.1016/j.expthermflusci.2018.07.025

M3 - Article

JO - Experimental Thermal and Fluid Science

JF - Experimental Thermal and Fluid Science

SN - 0894-1777

ER -