Crossed-Plane Laser Imaging of Premixed Turbulent Combustion Processes
Abstract
The objective of our research is to measure, using crossed-plane imaging, normal vectors and the instantaneous thermal structure of flamelets in premixed turbulent flames. Data for surface normal vectors can be used to calculate important quantities such as Sigma, the flamelet surface density. Sigma is a measure of the wrinkling of the flamelet surface and is proportional to the rate of product formation per unit volume in the flame, <w>, which appears as an unclosed term in premixed flame models and is related to the burning intensity. Flamelet thermal structure data can be used to estimate the constant of proportionality between <w> and Sigma. Instantaneous flamelet normals have been measured in three dimensions using crossed-plane imaging via either laser tomography or planar laser induced acetone fluorescence. We are now exploiting crossed-plane imaging for flamelet normal measurements in different burners and over a range of conditions. In additional we are developing crossed-plane Rayleigh imaging in order to measure temperature gradients within flamelets and thereby to determine their thermal structure. Through measurements of flamelet normal and thermal structure we can estimate <w>.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 19, 2001
- Accession Number
- ADP012117
Entities
People
- F. C. Gouldin
Organizations
- Cornell University