Experimental investigation of a premixed flame in an impinging turbulent stream

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:93272

Li, S C; Libby, P A; Williams, F A ^[1]

---

1. Univ. of California, San Diego, La Jolla, CA (United States)

Flames in stagnating turbulence provide useful vehicles for fundamental studies of turbulent reacting flows. The authors present here experimental data on premixed flames in a turbulent methane-air mixture impinging on a wall. Turbulence generators with two different hole sizes and therefore resulting in turbulent streams with two different integral scales are employed. Time-resolved axial and radial velocity components are measured at many positions along the axis. Corrections for the density and velocity biasing associated with the different seeding levels in reactants and products are made in terms of particle fluxes. The aerothermochemical conditions are such that the flame is found to be free standing, i.e., separated from the wall. Histograms of the axial velocity within the flame are interpreted so as to yield the progress variable and thus the density with the consequence that the paris of velocity data are supplemented with state data. Both conventional and Favre-averaged quantities are thereby obtained. Generation and redistribution of turbulent intensities within the flame are observed. The influence of the integral length of the turbulence on the character of the flame is in accord with physical arguments.

• DOE Contract Number: FG03-86ER13527; FG03-87ER13685
• OSTI ID: 93272
• Report Number(s): CONF-940711--
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
40 CHEMISTRY
COMBUSTION KINETICS
EXPERIMENTAL DATA
FLAMES
FLOW RATE
FLUID MECHANICS
METHANE
STAGNATION
TEST FACILITIES
TURBULENT FLOW