Investigation of time dependent flame structure by ionization probes

Conference · Thu Jan 01 00:00:00 EST 1981 · Symp. (Int.) Combust., (Proc.); (United States)

OSTI ID:5313540

Ventura, J M.P.; Suzuki, T; Yule, A J; Ralph, S; Chigier, N A

Ionization probes have been used to measure mean ionization current and frequency spectra, auto-correlations and cross-correlations in jet flames with variation in the initial Reynolds numbers and equivalence ratios. Special attention as been paid to the transitional region between the burner exit plane and the plane of onset of turbulence. Evidence of a double vortex structure was found, wtih low velocity large vortices at the outer part of the mixing layer and smaller, faster moving vortices on the inner side. These vortices distort the reaction zone and can thus be detected by the ionization probes. The transition to turbulence is indicated by the axial variations of auto-correlations and frequency spectra. 15 refs.

• Research Organization: Univ of Sheffield, England
• OSTI ID: 5313540
• Report Number(s): CONF-800809-
• Journal Information: Symp. (Int.) Combust., (Proc.); (United States), Conference: 18. combustion symposium, Waterloo, Canada, 17 Aug 1980
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
FLAMES
MONITORING
TURBULENCE
ION PROBES
TIME DEPENDENCE
VORTICES
PROBES
400800* - Combustion
Pyrolysis
& High-Temperature Chemistry