Accession Number : ADA621547


Title :   Physical and Chemical Processes in Turbulent Flames


Descriptive Note : Final rept. 15 Mar 2013-14 Mar 2015


Corporate Author : PRINCETON UNIV NJ


Personal Author(s) : Law, Chung K ; Wu, Fuija ; Saha, Abhishek ; Chaudhuri, Swetaprovo


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a621547.pdf


Report Date : 23 Jun 2015


Pagination or Media Count : 35


Abstract : The two-year subject program, conducted through tight coupling between experiment, theory and computation, and reported in high impact journal articles, has focused on the dynamics of turbulent flames mainly for hydrocarbon fuels in environments simulating various operational aspects of aero-engines. The thrust for this program constitutes of three major areas of turbulent combustion: (1) Flame surface statistics, (2) Flame-turbulence interaction, and (3) Effects of turbulence on the growth of ignition kernel. The research conducted through this program revealed a self similar evolution of flame surface geometry under the influence of turbulent eddies at different turbulence intensities. Moreover, the flame-turbulence interactions were quantified by comparing the evolutions of stretch rates on the flame surface due to flow strain and curvature as the flame grows. Finally, the role of turbulence on ignition was studied to show that for certain condition, turbulence can promote the growth of ignition kernel and thus success of the ignition process.


Descriptors :   *CHEMICAL REACTIONS , *COMBUSTION CHAMBERS , *FLAMES , *PHYSICAL PROPERTIES , *TURBULENCE , COMPUTERIZED SIMULATION , COUPLING(INTERACTION) , EVOLUTION(GENERAL) , EXPERIMENTAL DESIGN , GAUSSIAN NOISE , HIGH ENERGY , HYDROCARBONS , IGNITION , KERNEL FUNCTIONS , MIE SCATTERING , PLANAR STRUCTURES , STATISTICAL ANALYSIS , SURFACE PROPERTIES , THERMAL EXPANSION , THRUST , TURBULENT DIFFUSION , TURBULENT FLOW


Subject Categories : Thermodynamics
      Combustion and Ignition


Distribution Statement : APPROVED FOR PUBLIC RELEASE