Laser-induced incandescence measurements in a laminar co-annular non-premixed methane/air flame at a pressure of 0.5 - 4.0 MPa

6th International Christmas Tree Research & Extension Conference

K. A. Thomson ; D. R. Snelling ; G. J. Smallwood ; F. Liu

Others  :  http://CEUR-WS.org/Vol-195/thomson.pdf
PID  :  429

来源: CEUR

【 摘 要 】

Auto-compensating laser-induced incandescence (AC-LII) was applied to a high pressure non-premixed flame to measure soot volume fraction (SVF) and effective primary particle diameter (dpeff). Measured SVF and dpeff showed annular structures and good radial symmetry. LII determined SVF were lower than previous LOSA SVF measurements (60% lower at p = 0.5 MPa up to 30% lower at p = 4.0 MPa). The LII SVF curve shapes were similar to the LOSA SVF curves, though the former had lower measurement spatial resolution at the higher pressures (i.e. P = 2.0 and 4.0 MPa). Effective primary particle diameter increased with pressure and radius (e.g. 20 nm at r = 0 mm, p = 0.5 MPa to 100 nm at p = 4.0 MPa).