Research on the Effect of Diesel Injector Nozzle Deposit on Spray Characteristics

WANG Xian-cheng;ZHAO Wen-zhu;HE Mu;YANG Shao-qing;XU Dong-dong

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  • Sponsored by: China Association for Science and Technology (CAST)

    Editor-In-Chief: Xu Yida

    ISSN 1000-1093

    　

  • Hosted By: China Ordnance Society

    Published By: Acta Armamentarii

    CN 11-2176/TJ

Acta Armamentarii, a Chinese monthly journal, was first published in 1979. The journal is supervised by China Association for Science and Technology, sponsored by China Ordnance Society，and edited and published by Editorial Board of Acta Armamentarii. The Journal is included in all important domestic databases，and also collected by Engineering Index (EI, USA), Chemical Abstracts (CA, USA), Science Abstracts (SA, UK）, Abstract Journal (AJ, Russia), and Current Bibliography on Science and Technology(CBST).Acta Armamentarii has been selected into the journal Of Ordnance Science and Technology (Weapons Industry) Field Of High Quality Scientific and Technological Periodical Classification Catalogue (2022 edition), ranking T1, and the journal of Automotive Engineering Field of High Quality Scientific and technological Periodical classification Catalogue, ranking T2.
Acta Armamentarii ›› 2017, Vol. 38 ›› Issue (2) : 218-226. DOI: 10.3969/j.issn.1000-1093.2017.02.002
Paper

Research on the Effect of Diesel Injector Nozzle Deposit on Spray Characteristics

  • WANG Xian-cheng， ZHAO Wen-zhu， HE Mu， YANG Shao-qing， XU Dong-dong
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Abstract

The cold spray characteristics experiment of diesel injector is carried out in a constant volume bomb. The spray penetration distances and cone angles of carbon-deposited injector and new injector in the condition of different injections are analyzed. The results show that the spray penetration distance and cone angle of carbon-deposited injector decrease compared to those of new injector. The value gap is great at the initial stage of injection and is reduced at the late stage of injection. If the injection pressure is increased, spray penetration distance and cone angle would be decreased. The optical micrograph reveals that nozzle external deposit distributes along the orifice, and the original structure is changed. VOF (volume of fluid) is used to numerically calculate the internal flow, and the effects of internal and external deposits and increase in nozzle length on internal flow are analyzed. The results show that the internal and external deposits and increase in nozzle length could result in weakening the cavitation effect, reducing the mass flow rate, velocity and turbulent kinetic energy, and deteriorating the atomization quality. Compared with internal deposit and increase in nozzle length, the external deposit has more impact on internal flow. Key

Key words

powermachineryengineering / nozzledeposit / spraycharacteristic / internalflow / volumeoffluidmethod

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WANG Xian-cheng， ZHAO Wen-zhu， HE Mu， YANG Shao-qing， XU Dong-dong. Research on the Effect of Diesel Injector Nozzle Deposit on Spray Characteristics. Acta Armamentarii. 2017, 38(2): 218-226 https://doi.org/10.3969/j.issn.1000-1093.2017.02.002

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第38卷
第2期2017年2月兵工学报ACTA
ARMAMENTARIIVol.38No.2Feb.2017

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