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Author:

Lei, Yan (Lei, Yan.) | Liu, Jiaxing (Liu, Jiaxing.) | Qiu, Tao (Qiu, Tao.) | Mi, Jianchun (Mi, Jianchun.) | Liu, Xianwu (Liu, Xianwu.) | Zhao, Ning (Zhao, Ning.) | Peng, Guangyu (Peng, Guangyu.)

Indexed by:

EI Scopus SCIE

Abstract:

The spray tip penetration is an important parameter to evaluate the fuel injection quality. This study presents an experimental investigation on the high-pressure diesel injection process of a common-rail injector under condition of varying pressures, particularly on the effect of the dynamic injection behavior on the fuel spray penetration. The injector delivery process is tested on a common-rail test rig, with an optical test rig to examine the diesel spray based on a constant-volume bomb (CVB) system. This process includes two stages: i.e., the opening stage and the keeping stage, while the two-stage injection momentum causes crucial influence on the fuel spray. Correspondingly, the fuel spray penetration also has two stages. In Stage I (the dynamic stage), the spray penetration sharply increases. In Stage II (stable stage), the spray penetration stably increases. When the injection pressure rises, the spray tip penetration increases, and the two-stage turning-point time is shorter. Considering this two-stage characteristic, an equation is proposed to predicate the spray tip penetration: it is based on the dynamic injection pressure for the dynamic period but the constant pressure differential for the stable period. The predicated spray tip penetration has good agreement with the test data. (C) 2019 Elsevier Ltd. All rights reserved.

Keyword:

Spray penetration Diesel fuel Injector Constant volume bomb (CVB) Injection pressure

Author Community:

  • [ 1 ] [Lei, Yan]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 2 ] [Liu, Jiaxing]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 3 ] [Qiu, Tao]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 4 ] [Liu, Xianwu]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 5 ] [Zhao, Ning]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China
  • [ 6 ] [Mi, Jianchun]Peking Univ, Coll Engn, Beijing 100871, Peoples R China
  • [ 7 ] [Peng, Guangyu]Hunan Commun Polytech, Changsha 410132, Hunan, Peoples R China

Reprint Author's Address:

  • [Qiu, Tao]Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China

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Related Keywords:

Source :

ENERGY

ISSN: 0360-5442

Year: 2019

Volume: 188

9 . 0 0 0

JCR@2022

ESI Discipline: ENGINEERING;

ESI HC Threshold:136

JCR Journal Grade:1

Cited Count:

WoS CC Cited Count: 13

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 0

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