Combustion Diagnostics by Photo-Deflection Spectroscopy
Abstract
Experimental and theoretical investigations of photoacoustic deflection spectroscopy (PADS) and photo thermal deflection spectroscopy (PDTS) have been carried out for the application of these techniques to combustion diagnostics. The investigations have been two-pronged: (1) To determine the range of applicability of these techniques to combustion diagnostics, and (2) to develop a good theoretical and experimental understanding of these techniques so that quantitative measurements can be made. Both techniques (PADS and PTDS) are very useful for combustion diagnostics and absolute measurements of the species concentrations. Also, simultaneous measurements of species concentrations, local temperature, and flow velocity can be made. With these techniques the most stringent tests of the theoretical models of combustion can be done. PTDS is about an order of magnitude more sensitive than PADS, and therefore PTDS was chosen for a thorough theoretical and experimental investigation. The results showed a good agreement between the theory and the experiment. Where disagreement existed, reasons for the discrepancies were determined. Photo- Deflection Spectroscopy Photo-Acoustic Deflection, Spectroscopy, Photo-Thermal Deflection, Spectroscopy, Flames, Combustion.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1992
- Accession Number
- ADA250802
Entities
People
- Rajendra Gupta
Organizations
- University of Arkansas