Accession Number:

ADA560959

Title:

Effect of von Karman Vortex Shedding on Regular and Open-slit V-gutter Stabilized Turbulent Premixed Flames

Descriptive Note:

Conference paper

Corporate Author:

AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE

Personal Author(s):

Report Date:

2012-04-01

Pagination or Media Count:

20.0

Abstract:

The commercial code FLUENT is used for modeling and simulation of three- and twodimensional non-reacting and reacting flows past regular and open-slit V-gutters. Incompressible Large-Eddy Simulations with Dynamic Subgrid Kinetic Energy Model, C-progress variable equation and Zimont turbulent flame speed closure are used. C3H8 is used as the fuel. The measured and predicted time-averaged streamwise velocity and r.m.s velocity are qualitatively similar for both three- and two-dimensional regular V-gutters under non-reacting conditions.However, the two-dimensional geometry predicts a longer recirculation zone, but shifted upstream. The two-dimensional geometry overpredicts the turbulence fluctuation downstream the flameholder, whereas the three-dimensional geometry underpredicts it. The two-dimensional geometry exhibits greater drag coefficient CD per unit flameholder width than that of the corresponding three-dimensional geometry. However, the Strouhal numbers St for both geometries are similar.

Subject Categories:

  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE