Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
EXPERIMENTAL STUDY OF LAMINAR NON PREMIXED ETHYLENE/AIR FLAMES USING LASER INDUCED INCANDESCENCE AND FLUORESCENCE
Submission Author:
Juan Cruz , RJ
Co-Authors:
Juan Cruz, Luís Fernando Figueira da Silva, Andrés Fuentes
Presenter: Juan Cruz
doi://10.26678/ABCM.COBEM2017.COB17-1593
Abstract
In this work is presented a combined planar laser induced fluorescence (PLIF) and laser induced incandescence (LII) study of laminar premixed ethylene/air flames. These flames are stabilized at a Gülder burner. Both the fluorescence and incandescence processes are excited using a pulsed UV (266nm) laser source. The soot signal corresponding to a delayed signal detection by an intensified camera, whereas the prompt detection should involve the simultaneous soot and polycyclic aromatics hydrocarbons (PAH) presence. The calibration of LII signal to soot volume fractions is achieved by means of line of sight attenuation methodology. Two band-pass filters (400 nm and 550 nm) have beem used, so as to evidence different regions within the flame. The soot region radiation is used to measure the temperature fields by two-color pyrometry using a pair of filters (530 nm and 900 nm). The results demonstrate that, at the colder region, near the fuel inlet, PAH seem to prevail. Fol lowing this region, in a warmer mid–height zone, both soot and PAH appears to coexist. Near the flame tip soot is found only.
Keywords
PAHs, Soot, LII, LIF, Two-color pyrometer.
