Velocity and scalar fields of turbulent premixed flame in stagnation flow

Conference · Mon Aug 01 04:00:00 EDT 1988

DOI:https://doi.org/10.1016/S0082-0784(89)80082-7· OSTI ID:6288899

Cho, P.; Law, C. K.; Cheng, R. K.; Shepherd, I. G.

Detailed experimental measurements of the scalar and velocity statistics of premixed methane/air flames stabilized by a stagnation plant are reported. Conditioned and unconditioned velocity of two components and the reaction progress variables are measured by using a two-component laser Doppler velocimetry techniques and Mie scattering techniques, respectively. Experimental conditions cover equivalence ratios of 0.9 and 1.0, incident turbulence intensities of 0.3 to 0.45 m/s, and global stretch rates of 100 to 150 sec/sup /minus/1/. The experimental results are analyzed in the context of the Bray-Moss-Libby flamelet model of these flames. The results indicate that there is no turbulence production within the turbulent flame brush and the second and third order turbulent transport terms are reduced to functions of the difference between the conditioned mean velocity. The result of normalization of these relative velocities by the respective velocity increase across laminar flames suggest that the mean unconditioned velocity profiles are self-similar. 13 refs., 5 figs., 1 tab.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6288899
• Report Number(s): LBL-26747; CONF-880802-10; ON: DE89009336
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
640410 -- Fluid Physics-- General Fluid Dynamics
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKANES
COMBUSTION PROPERTIES
EQUATIONS
FLAMES
FLUID FLOW
HYDROCARBONS
METHANE
ORGANIC COMPOUNDS
STAGNATION
TURBULENT FLOW
VELOCITY