Velocity and scalar fields of turbulent premixed flame in stagnation flow

Conference · Mon Aug 01 00:00:00 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 National Lab. (LBNL), Berkeley, CA (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6288899
• Report Number(s): LBL-26747; CONF-880802-10; ON: DE89009336
• Resource Relation: Journal Volume: 22; Journal Issue: 1; Conference: 22. international symposium on combustion, Seattle, WA, USA, 14 Aug 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

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