Experimental measurements of diesel spray in an inert gas generator
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- Master i teknologi 
A 90° Y-jet atomizing nozzle with 3 bores was experimentally tested in a science facility at University College of Southeast Norway. The nozzle is producing a diesel fuel spray for a pilot flame in an IGG system for marine shipping of LNG. The diesel fuel was replaced by water for environmental reasons in the experiment. The spray was photographed with a high-speed camera using an IR laser for a light source and the images were processed using a user defined method for droplet diameter determination. The measured droplet diameter distribution and the calculated SMD indicates large droplets at elevated pressures and the nozzle produces a large span of droplets. The nozzle was performing adequately within the turndown ratio, with the precaution that the span of droplet diameters is within reason for the users of the nozzle. The span of the droplet sizes increased with pressure increase. Findings of non-spherical droplets, bulges and sheets of water were unavailable for measurement due to limitations of the image processing technique, suggestions for further analysis are presented. Replacing water for diesel was an acceptable method and is recommended for similar non-combusting experiments. However, further research of the coherence between water and diesel spray is recommended.