Details
Originalsprache | Englisch |
---|---|
Seiten | 506-511 |
Seitenumfang | 6 |
Publikationsstatus | Veröffentlicht - 2012 |
Veranstaltung | 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012 - Fukuoka, Japan Dauer: 23 Juli 2012 → 26 Juli 2012 |
Konferenz
Konferenz | 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012 |
---|---|
Land/Gebiet | Japan |
Ort | Fukuoka |
Zeitraum | 23 Juli 2012 → 26 Juli 2012 |
Abstract
Injection systems of modern diesel engines are the key to increase the fuel efficiency and to lower pollutant emissions. Therefore, a detailed understanding of the spray generated by the injector nozzle is crucial to optimize the process of the mixture formation and thus the combustion process. Up to now, the spray behavior in the near nozzle field is not completely understood. Standard optical diagnostic methods are known to fail visualizing the near nozzle region due to the high optical density of the diesel spray. One approach to address this challenge is the optical connectivity method, described by Charalampous et al. ([1], [2]). It can be used to measure the length of the continuous liquid jet core in sprays. Here, the laser light is directed through the injection nozzle to illuminate the liquid jet internally. The spray breakup interrupts a further light transfer and thus limits the illuminated area to the liquid core. While so far a specially designed injector was necessary, in this work a new approach is invented where the laser light is guided by an optical fiber into the sack hole through one of the injector holes of an unmodified stock injector. The feasibility of this approach is demonstrated on a heavy duty diesel injector with fuel pressures up to 80 MPa, being adapted to the large high pressure injection chamber of the Institute of Technical Combustion in Hannover. Other than in [1], no additional tracer fuel was necessary, as the direct stray light yielded enough signal intensity. First results of the transient behavior of the liquid core length are discussed.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Steuerungs- und Systemtechnik
- Mathematik (insg.)
- Modellierung und Simulation
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2012. 506-511 Beitrag in 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012, Fukuoka, Japan.
Publikation: Konferenzbeitrag › Paper › Forschung › Peer-Review
}
TY - CONF
T1 - Application of the optical connectivity method to a real size heavy duty CIDI-injector
AU - Kaiser, Max
AU - Heilig, Ansgar
AU - Dinkelacker, Friedrich
PY - 2012
Y1 - 2012
N2 - Injection systems of modern diesel engines are the key to increase the fuel efficiency and to lower pollutant emissions. Therefore, a detailed understanding of the spray generated by the injector nozzle is crucial to optimize the process of the mixture formation and thus the combustion process. Up to now, the spray behavior in the near nozzle field is not completely understood. Standard optical diagnostic methods are known to fail visualizing the near nozzle region due to the high optical density of the diesel spray. One approach to address this challenge is the optical connectivity method, described by Charalampous et al. ([1], [2]). It can be used to measure the length of the continuous liquid jet core in sprays. Here, the laser light is directed through the injection nozzle to illuminate the liquid jet internally. The spray breakup interrupts a further light transfer and thus limits the illuminated area to the liquid core. While so far a specially designed injector was necessary, in this work a new approach is invented where the laser light is guided by an optical fiber into the sack hole through one of the injector holes of an unmodified stock injector. The feasibility of this approach is demonstrated on a heavy duty diesel injector with fuel pressures up to 80 MPa, being adapted to the large high pressure injection chamber of the Institute of Technical Combustion in Hannover. Other than in [1], no additional tracer fuel was necessary, as the direct stray light yielded enough signal intensity. First results of the transient behavior of the liquid core length are discussed.
AB - Injection systems of modern diesel engines are the key to increase the fuel efficiency and to lower pollutant emissions. Therefore, a detailed understanding of the spray generated by the injector nozzle is crucial to optimize the process of the mixture formation and thus the combustion process. Up to now, the spray behavior in the near nozzle field is not completely understood. Standard optical diagnostic methods are known to fail visualizing the near nozzle region due to the high optical density of the diesel spray. One approach to address this challenge is the optical connectivity method, described by Charalampous et al. ([1], [2]). It can be used to measure the length of the continuous liquid jet core in sprays. Here, the laser light is directed through the injection nozzle to illuminate the liquid jet internally. The spray breakup interrupts a further light transfer and thus limits the illuminated area to the liquid core. While so far a specially designed injector was necessary, in this work a new approach is invented where the laser light is guided by an optical fiber into the sack hole through one of the injector holes of an unmodified stock injector. The feasibility of this approach is demonstrated on a heavy duty diesel injector with fuel pressures up to 80 MPa, being adapted to the large high pressure injection chamber of the Institute of Technical Combustion in Hannover. Other than in [1], no additional tracer fuel was necessary, as the direct stray light yielded enough signal intensity. First results of the transient behavior of the liquid core length are discussed.
KW - Cidi-injector
KW - Injection chamber
KW - Liquid core
KW - Optical fiber
KW - Optical spray diagnostics
UR - http://www.scopus.com/inward/record.url?scp=84877859888&partnerID=8YFLogxK
M3 - Paper
AN - SCOPUS:84877859888
SP - 506
EP - 511
T2 - 8th International Conference on Modeling and Diagnostics for Advanced Engine Systems, COMODIA 2012
Y2 - 23 July 2012 through 26 July 2012
ER -