These high-speed elastic scattering images are taken through the bottom of the piston with flood illumination by a high pulse-rate LED at a frame rate of 120kfps. The light-duty optical engine is skip-fired with nitrogen, so this is a non-combusting experiment. 300 images per cycle are taken for 46 cycles. The images have been distortion corrected and background subtracted as described in (Busch and Miles, 2015). The processed images have been saved in .mat files for each of 46 injected cycles, and for the ensemble averaged cycle. Each .mat file contains two variables. The first variable, "cad" is the crank angle at which each image has been taken. The second variable, "images", is a 3-dimensional matrix. The first two dimensions are the image size, and the third dimension is the crank angle.

The images have been taken from the bottom, and the orientation is described in Injector Clocking and Labels.png. The scaling of the distortion corrected images is 8 pixels/mm.

Liquid length is computed individually for each jet and cycle, according to the methodology of Naber and Siebers. The threshold used for this computation is 3% of the maximum intensity for each jet and each cycle. The data for each jet and cycle are stored in LiquidLengthData.mat.