Velocity Measurements in High Temperature Gases Using Laser-Induced No Fluorescence
Abstract
This report describes the results of a Phase I SBIR program which investigated the applicability of a Laser Induced Fluorescence (LIF) velocimetry diagnostic technique based on Doppler-shifted NO fluorescence. The intent of the program was to quantitatively understand the potential accuracy of the approach in high-temperature, high-pressure gas flow applications when one is restricted to use only a single laser wavelength. The single laser wavelength approach greatly simplifies the experimental requirements while retaining the capability of simultaneous, multiple-point velocity field measurements. The report summarizes detailed analytical studies which demonstrate that, for representative NO lineshapes and available pulse dye lasers, single-shot measurements of the instantaneous velocity field are possible in essentially uncharacterized pressure and temperature fields with less than 10 percent uncertainty. When a priori information on the pressure or temperature field is available, the instantaneous measurement uncertainty is reduced to less than 5 percent.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1991
- Accession Number
- ADA242399
Entities
People
- Mark G. Allen
- S. J. Davis
Organizations
- Physical Sciences (United States)