Accession Number : AD1018288


Title :   Example Problems in LES Combustion


Descriptive Note : Technical Report


Corporate Author : Air Force Research Laboratory Eglin AFB United States


Personal Author(s) : Nance,Douglas V


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1018288.pdf


Report Date : 26 Sep 2016


Pagination or Media Count : 36


Abstract : This memorandum provides a brief introduction to finite rate chemistry in the framework of large eddy simulation for compressible flow fields. Particular emphasis is placed upon the filtered reaction rate expression through the use turbulent chemical closure terms. The Eddy Break-Up model is an example of this type of closure term. Within the multiphase physics computer code LESLIE3D, these algorithms are tested on a gas phase acetylene combustion problem and on a shock wave initiated droplet evaporation and combustion problem. Results are shown for each problem. Comparisons are shown for kinetic and Eddy Break-Up model filtered reaction rates. For the droplet problem, droplet evaporation, combustion and product formation is demonstrated.


Descriptors :   flow fields , compressible flow , algorithms , combustion , shock waves , kerosene , turbulence , chemical reactions , chemical kinetics , reaction mechanisms , computer programs , turbulent mixing , chemical products , cyclic hydrocarbons , hydrocarbon fuels , three dimensional , surface chemistry , turbulent flow , combustors


Distribution Statement : APPROVED FOR PUBLIC RELEASE