Turbulence in Free Diffusion Flames of Hydrogen-Nitrogen Mixtures Burning in Still Air.
Abstract
The research undertaken in this report deals with the measurement of time averaged flow variables and turbulence intensities in turbulent diffusion flames. The difficulties encountered in separating the effects of temperature, velocity and species concentration on a hot-film anemometer signal required the use of special techniques for measuring the turbulence in the diffusion flames. Results obtained in an axisymmetric air jet are compared with data obtained from a crossed hot-film anemometer. The axial turbulence equations are then derived. Large increases in the axial turbulence intensity, as well as in the jet core length, are found in the diffusion flame, along with reductions in the radial turbulence intensity. Results are examined in light of the general momentum and turbulence intensity equations for flows with density fluctuations and are seen to be consistent with effects deducible for a density-velocity fluctuation correlation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1975
- Accession Number
- ADA016454
Entities
People
- Roger R. Craig
Organizations
- Air Force Research Laboratory