High-speed schlieren images showing the development of shockwaves as a function of ambient density, with constant ambient temperature of 455 K in nitrogen. Other injector conditions are the Spray A operating condition using Injector 210370. Schlieren imaging was performed at 180,000 frames per second with a resolution of 4.8 pixels/mm. Images are normalized by the intensity at the start of injection and displayed with contrast range from 50 to 130% of this original intensity. Please reference SAE paper from Quan et al. (2014).
|Lens f, f/#||85 mm, f/1.8||85 mm, f/1.8||85 mm, f/1.8||85 mm, f/1.8|
|Frame period [µs]||5.56||5.56||5.56||5.56|
|Exp. time [µs]||1||1||1||1|
|Movies as a function of ambient density: Play or right-click to download mp4||0.81 kg/m3||2.55 kg/m3||11.7 kg/m3||22.8 kg/m3|
For additional information on shockwave visualization in diesel sprays, please see Kook and Pickett (2010).