High pressure combustion duct (HPCD) for fundamental turbulence-chemistry interaction studies

A high pressure combustion duct  (45 bar) is used to contain high Reynolds number flames for fundamental turbulence-chemistry interaction studies as well as soot formation. The apparatus is 8 meters tall and weighs >10,000 lbs). 

This instrument is used  for studying turbulent non-premixed flames operating at high pressures.   This duct allows for flames up to 1.5 meters in length and characterized by Reynolds numbers in excess of 20,000 while under pressures up to 40 bar. Internally, a vertical translation stage supports burners with variable geometry and allows for optical access to the entire length of the flame.

Six optical ports fitted with UV fused silica windows make a multitude of laser diagnostics possible. Planned diagnostics include particle image velocimetry, laser induced fluorescence, laser induced incandescence, and Raman/Rayleigh spectrometry.