Measured Properties of Turbulent Premixed Flames for Model Assessment, Including Burning Velocities, Stretch Rates, and Surface Densities (Postprint)
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH PROPULSION DIRECTORATE
Pagination or Media Count:
One goal of this work was to quantify several properties of turbulent premixed flames that have not been quantified before and are especially useful for the assessment of direct numerical simulations DNS and models. It was decided to select a flame that is in the corrugated flamelet regime and use simultaneous CH planar laser-induced fluorescence particle image velocimetry CH PLIFPIV diagnostics, which previously had been applied only to nonpremixed combustion. These diagnostics allow one to identify the thin wrinkled reaction zone where CH exists and the nearby velocity field. Properties that were measured include local stretch rates, a wrinkling parameter, the degree of flamelet extinction, reaction layer thicknesses, flame surface density , and global consumption speed, which is one type of turbulent burning velocity that is described below.
- Radiation and Nuclear Chemistry
- Computer Programming and Software
- Combustion and Ignition