title: Single-shot, volumetrically illuminated, three-dimensional, tomographic laser-induced-fluorescence imaging in a gaseous free jet.
abstract: Single-shot, tomographic imaging of the three-dimensional concentration field is demonstrated in a turbulent gaseous free jet in co-flow using volumetrically illuminated laser-induced fluorescence. The fourth-harmonic output of an Nd:YAG laser at 266 nm is formed into a collimated 15 × 20 mm2beam to excite the ground singlet state of acetone seeded into the central jet. Subsequent fluorescence is collected along eight lines of sight for tomographic reconstruction using a combination of stereoscopes optically coupled to four two-stage intensified CMOS cameras. The performance of the imaging system is evaluated and shown to be sufficient for recording instantaneous three-dimensional features with high signal-to-noise (130:1) and nominal spatial resolution of 0.6-1.5 mm at x/D = 7-15.5.
authors.forename: Benjamin R
authors.initials: BR
authors.lastname: Halls
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Thul
authors.forename: Dirk
authors.initials: D
authors.lastname: Michaelis
authors.forename: Sukesh
authors.initials: S
authors.lastname: Roy
authors.forename: Terrence R
authors.initials: TR
authors.lastname: Meyer
authors.forename: James R
authors.initials: JR
authors.lastname: Gord