Hydrogen Fluoride Tracer Molecule Spectroscopy Applied to Turbulent Mixing and Combustion.
Abstract
Turbulent mixing between coaxial streams of dissimilar gases is experimentally studied. The inner stream is tagged with a tracer molecule, hydrogen fluoride. Species concentrations and turbulent mixing extents are determined spectroscopically. Details of the technique for radiatively absorbing cold jets are given. Experiments with cold jets at subsonic and transonic Mach numbers show that the mixing layer width increases with nondimensional mass flux difference, and decreases with increasing Mach number level. Supersonic mixing and combustion of hydrogen and air is obtained using a three phase AC arc heater to heat the air. Schlieren photographs show a substantial increase in the rate of jet spread when combustion occurs. Preliminary determinations of temperature and concentration profiles, using the HF tracer, are presented. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1970
- Accession Number
- AD0870184
Entities
People
- James A. Nicholls
- Philip C. Malte
Organizations
- University of Michigan