Advances in Time-gated Ballistic Imaging for Studies of Atomizing Fuel Sprays
Licentiatavhandling, 2015

The transportation sector of today relies heavily on fossil fuels. This is undesirable both due to the finite nature of the fossil resources and to the effects of global warming. Therefore, there is a need to find alternative fuels and simultaneously develop combustion engines with higher efficiencies. This thesis describes the further development and application of ballistic imaging. Ballistic imaging is a laser based diagnostic technique designed to obtain information about the primary breakup of fuel sprays. It makes use of femtosecond laser pulses and very fast nonlinear optical devices to suppress noise generated by droplet scattering in shadowgraphy-styled images. This allows the interior if the primary breakup region to be imaged. With a better understanding of the dynamics involved when the contiguous liquid is dispersed into a spray, engines with higher efficiencies and lower engine-out emissions can be more rapidly designed.

Ultrafast lasers

Ballistic imaging

Atomizing sprays

Fuel sprays


Gamma/Delta, Hörsalsvägen 7, Göteborg


Mattias Rahm

Chalmers, Tillämpad mekanik, Förbränning

Evidence for Supercritical Regions of the ECN Spray A

Proceedings of the 35th International Combustion Symposium,; (2014)

Paper i proceeding

Optical Arrangements for Time-Gated Ballistic Imaging

Optics InfoBase Conference Papers: Imaging Systems and Applications, ISA 2014, Seattle, United States, 13-17 July 2014,; (2014)

Paper i proceeding


Hållbar utveckling




Atom- och molekylfysik och optik


Strömningsmekanik och akustik

Technical report - Department of Applied Mechanics, Chalmers University of Technology, Göteborg, Sweden

Gamma/Delta, Hörsalsvägen 7, Göteborg