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PIV measurement of internal structure of diesel fuel spray

Abstract

This paper reports particle image velocimetry (PIV) measurements of diesel fuel spray injected from a single-hole nozzle at injection pressures ranging from 30 to 70 MPa, which are comparable to partial-load operating conditions of commercial diesel engines. The fuel is injected into a non-combusting environment pressurized up to 2.0 MPa. A laser-induced fluorescent (LIF) technique is utilized to visualize internal structures of fuel sprays formed by densely-distributing droplets. A specially designed synchronization system is developed to acquire double-frame spray images at an arbitrary time delay after injection. A direct cross-correlation PIV technique is applied to measure instantaneous droplet velocity distribution. Unique large-scale structures in droplet concentration, called 'branch-like structures' by Azetsu et al. (1990), are observed and shown to be associated with active vortical motions, which appear to be responsible for the mixing between droplets and the surrounding gas. It is found that the droplets tend to move out of the vortical structures and accumulate in the regions of low vorticity. Some other interesting features concerning droplet velocity fields are also presented. (orig.)
Authors:
Cao, Z M; [1]  Nishino, K; [2]  Mizuno, S; [3]  Torii, K [4] 
  1. Ecotechnology System Lab., Yokohama National Univ. (Japan)
  2. Div. of Artificial Environment and Systems, Yokohama National Univ. (Japan)
  3. Yokohama National Univ. (Japan)
  4. Dept. of Mechanical Engineering and Materials Science, Yokohama National Univ. (Japan)
Publication Date:
Dec 01, 2000
Product Type:
Journal Article
Reference Number:
EDB-01:052230
Resource Relation:
Journal Name: Experiments in Fluids; Journal Volume: 29; Journal Issue: Suppl.; Conference: PIV '99: 3. international workshop on particle image velocimetry, Santa Barbara, CA (United States), 16-18 Sep 1999; Other Information: With 12 figs., 2 tabs.; PBD: Dec 2000
Subject:
33 ADVANCED PROPULSION SYSTEMS; 42 ENGINEERING; DIESEL FUELS; SPRAYS; IMAGES; HOLES; NOZZLES; INJECTION; DIESEL ENGINES; PARTICLES; VELOCIMETERS; LASERS; DROPLETS; DESIGN; SYNCHRONIZATION; TIME DELAY; MOTION; MIXING
OSTI ID:
20164108
Country of Origin:
Germany
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0723-4864; EXFLDU; TRN: DE01G7611
Submitting Site:
DE
Size:
page(s) S211-S219
Announcement Date:

Citation Formats

Cao, Z M, Nishino, K, Mizuno, S, and Torii, K. PIV measurement of internal structure of diesel fuel spray. Germany: N. p., 2000. Web. doi:10.1007/s003480070023.
Cao, Z M, Nishino, K, Mizuno, S, & Torii, K. PIV measurement of internal structure of diesel fuel spray. Germany. doi:10.1007/s003480070023.
Cao, Z M, Nishino, K, Mizuno, S, and Torii, K. 2000. "PIV measurement of internal structure of diesel fuel spray." Germany. doi:10.1007/s003480070023. https://www.osti.gov/servlets/purl/10.1007/s003480070023.
@misc{etde_20164108,
title = {PIV measurement of internal structure of diesel fuel spray}
author = {Cao, Z M, Nishino, K, Mizuno, S, and Torii, K}
abstractNote = {This paper reports particle image velocimetry (PIV) measurements of diesel fuel spray injected from a single-hole nozzle at injection pressures ranging from 30 to 70 MPa, which are comparable to partial-load operating conditions of commercial diesel engines. The fuel is injected into a non-combusting environment pressurized up to 2.0 MPa. A laser-induced fluorescent (LIF) technique is utilized to visualize internal structures of fuel sprays formed by densely-distributing droplets. A specially designed synchronization system is developed to acquire double-frame spray images at an arbitrary time delay after injection. A direct cross-correlation PIV technique is applied to measure instantaneous droplet velocity distribution. Unique large-scale structures in droplet concentration, called 'branch-like structures' by Azetsu et al. (1990), are observed and shown to be associated with active vortical motions, which appear to be responsible for the mixing between droplets and the surrounding gas. It is found that the droplets tend to move out of the vortical structures and accumulate in the regions of low vorticity. Some other interesting features concerning droplet velocity fields are also presented. (orig.)}
doi = {10.1007/s003480070023}
journal = {Experiments in Fluids}
issue = {Suppl.}
volume = {29}
journal type = {AC}
place = {Germany}
year = {2000}
month = {Dec}
}