Physical and Chemical Processing in Flames
Abstract
The subject program, conducted through tight coupling between theory, experiment and computation and reported in 20 journal articles, has focused on the chemistry and dynamics of laminar and turbulent flames of surrogate jet fuels in environments simulating various operational aspects of aero-engines. For studies on combustion chemistry, we have experimentally acquired such chemistry-affected data as the ignition criteria and laminar flame speeds of fuel-air mixtures, which are respectively relevant for low- and high-temperature chemistries, and used these data to assist the development of their reaction mechanisms. For studies on flame dynamics, we have identified and classified various modes of intrinsic flame front instability for laminar flames, including thermal-diffusive cellular and pulsating instabilities, as well as the (cellular) hydrodynamic instability which is promoted at elevated pressures. For turbulent flames we have developed a novel apparatus allowing the study of expanding spherical flames in controlled turbulence and at constant, elevated pressures. The measured turbulent flame speeds show accelerative propagation and correlation with an appropriately-defined turbulent Reynolds number based on global flame radius and Markstein diffusivity.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 12, 2013
- Accession Number
- ADA589217
Entities
People
- Chung K. Law
Organizations
- Princeton University