Details
| Originalsprache | Englisch |
|---|---|
| Qualifikation | Doktor der Ingenieurwissenschaften |
| Gradverleihende Hochschule | |
| Betreut von |
|
| Datum der Verleihung des Grades | 10 Juli 2024 |
| Erscheinungsort | Garbsen |
| ISBNs (Print) | 3690300460, 9783690300469 |
| Publikationsstatus | Veröffentlicht - 2025 |
Abstract
To this end, a set of specialized simultaneous techniques was developed, including a tailored Elastic Photon Optical Connectivity system in combination with a "focused" shadowgraphy setup. This approach enabled microscopically resolved measurements of the near nozzle region. The application within a High-Pressure High-Temperature Injection Chamber facilitated the measurement of the intact core length, ICL, and spray cone angle, Θ, under different charge densities and for various fuel temperatures.
These experiments allowed for a deeper understanding of the influence of these parameters. Consequently, the measured values of ICL and Θ were employed to calibrate spray models from the literature, which were extended to include a dependency on the fuel temperature.
In the future, these enhanced models may serve to elucidate the interrelation of the sub-processes turbulence and cavitation.
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Garbsen, 2025. 146 S.
Publikation: Qualifikations-/Studienabschlussarbeit › Dissertation
}
TY - BOOK
T1 - Development of the Optical Connectivity Method for Diesel Injectors for Modeling the Primary Spray Breakup
AU - Kaiser, Max
PY - 2025
Y1 - 2025
N2 - The phenomenon of diesel spray remains to be fully understood, necessitating a comprehensive collection of complementary measurement techniques to facilitate a more profound insight. Detailed measurement of the primary spray breakup is particularly challenging due to the prevalence of opacity, high pressure gradients, and liquid velocities, as well as the extensive range of scales that are covered. This study focuses on the primary breakup zone, which can be defined as the liquid core just after nozzle exit and its near-field spray. To this end, a set of specialized simultaneous techniques was developed, including a tailored Elastic Photon Optical Connectivity system in combination with a "focused" shadowgraphy setup. This approach enabled microscopically resolved measurements of the near nozzle region. The application within a High-Pressure High-Temperature Injection Chamber facilitated the measurement of the intact core length, ICL, and spray cone angle, Θ, under different charge densities and for various fuel temperatures.These experiments allowed for a deeper understanding of the influence of these parameters. Consequently, the measured values of ICL and Θ were employed to calibrate spray models from the literature, which were extended to include a dependency on the fuel temperature.In the future, these enhanced models may serve to elucidate the interrelation of the sub-processes turbulence and cavitation.
AB - The phenomenon of diesel spray remains to be fully understood, necessitating a comprehensive collection of complementary measurement techniques to facilitate a more profound insight. Detailed measurement of the primary spray breakup is particularly challenging due to the prevalence of opacity, high pressure gradients, and liquid velocities, as well as the extensive range of scales that are covered. This study focuses on the primary breakup zone, which can be defined as the liquid core just after nozzle exit and its near-field spray. To this end, a set of specialized simultaneous techniques was developed, including a tailored Elastic Photon Optical Connectivity system in combination with a "focused" shadowgraphy setup. This approach enabled microscopically resolved measurements of the near nozzle region. The application within a High-Pressure High-Temperature Injection Chamber facilitated the measurement of the intact core length, ICL, and spray cone angle, Θ, under different charge densities and for various fuel temperatures.These experiments allowed for a deeper understanding of the influence of these parameters. Consequently, the measured values of ICL and Θ were employed to calibrate spray models from the literature, which were extended to include a dependency on the fuel temperature.In the future, these enhanced models may serve to elucidate the interrelation of the sub-processes turbulence and cavitation.
U2 - 10.15488/19176
DO - 10.15488/19176
M3 - Doctoral thesis
SN - 3690300460
SN - 9783690300469
T3 - Berichte aus dem ITV
CY - Garbsen
ER -