Projektbeschreibung
Neue bildgebende Verfahren zur genauen Charakterisierung von Sprühsystemen
Die Streuung des Lichts bei der Bildgebung führt zu erheblichen Unschärfen in den aufgenommenen Fotos, was die Anwendungsmöglichkeiten und die Präzision moderner optischer Instrumente wie der Laserdiagnostik für Sprühsysteme einschränkt. Im Jahr 2008 führte der Hauptforscher des aktuellen EU-finanzierten Projekts Spray-Imaging ein auf strukturierter Beleuchtung basierendes Verfahren ein, das die Auswirkungen der Mehrfachstreuung von Licht wirksam eliminiert. Aufbauend auf diesem Durchbruch zielt das Projekt Spray-Imaging darauf ab, drei innovative bildgebende Verfahren zur umfassenden Analyse von Sprühsystemen zu konzipieren und umzusetzen. Zu den Hauptzielen des Projekts gehören die kontrastreiche und hochauflösende Visualisierung verschiedener bisher unbeobachteter Sprühphänomene, die Charakterisierung des Tröpfchenfeldes mit einer dreidimensionalen Bildgebungsmethode und die Abbildung der Temperaturverteilung im gesamten Sprühsystem.
Ziel
The multiple scattering of light is a complex phenomenon, commonly encountered but rarely desired. In imaging it induces strong blurring on the recorded photographs, limiting the range of applicability and accuracy of modern optical instruments. A typical example concerns the laser diagnostics of spray systems. The PI has revealed in 2008 a technique based on structured illumination with the important capability to remove the contributions from multiple light scattering, allowing the unique possibility of visualising through dense sprays. Based on this acquired knowledge, the aim of this proposal is to develop and apply three novel imaging techniques for the complete characterizations of spray systems:
The first technique will focus on visualizing with both high contrast and high resolution various spray phenomena that have not been observed in the past; such as complex spray breakup mechanisms in the near-nozzle region.
The second technique is related to the characterization of the formed droplets field. This concerns the accurate measurement of both droplets size and concentration using a three-dimensional imaging approach.
Finally, a third important task is the mapping of the spray temperature over the whole spray system. This information would lead to the determination of heat transfer and evaporation rate, which are key factors in the performance of combustion devices.
By extracting these important quantities - dynamics, droplets size/concentration and thermometry - fundamental insights which are still missing to fully understand the process of atomization will be provided. This will also serve at validating modern CFD models, leading to reliable predictions of spray behaviours. Even though this work can directly benefit to a large number of medical and industrial spray applications, it will mostly focus on fuel spray injections used in combustion devices.
Wissenschaftliches Gebiet
- engineering and technologyenvironmental engineeringenergy and fuelsliquid fuels
- natural sciencesphysical sciencesopticsmicroscopy
- engineering and technologymaterials engineeringcoating and films
- engineering and technologyindustrial biotechnologybiomaterialsbiofuels
- natural sciencesphysical sciencesopticslaser physics
Programm/Programme
Thema/Themen
Finanzierungsplan
ERC-STG - Starting GrantGastgebende Einrichtung
22100 Lund
Schweden