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PIV Measurements in Weakly Buoyant Gas Jet FlamesDespite numerous experimental investigations, the characterization of microgravity laminar jet diffusion flames remains incomplete. Measurements to date have included shapes, temperatures, soot properties, radiative emissions and compositions, but full-field quantitative measurements of velocity are lacking. Since the differences between normal-gravity and microgravity diffusion flames are fundamentally influenced by changes in velocities, it is imperative that the associated velocity fields be measured in microgravity flames. Velocity measurements in nonbuoyant flames will be helpful both in validating numerical models and in interpreting past microgravity combustion experiments. Pointwise velocity techniques are inadequate for full-field velocity measurements in microgravity facilities. In contrast, Particle Image Velocimetry (PIV) can capture the entire flow field in less than 1% of the time required with Laser Doppler Velocimetry (LDV). Although PIV is a mature diagnostic for normal-gravity flames , restrictions on size, power and data storage complicate these measurements in microgravity. Results from the application of PIV to gas jet flames in normal gravity are presented here. Ethane flames burning at 13, 25 and 50 kPa are considered. These results are presented in more detail in Wernet et al. (2000). The PIV system developed for these measurements recently has been adapted for on-rig use in the NASA Glenn 2.2-second drop tower.
Document ID
20010074005
Acquisition Source
Glenn Research Center
Document Type
Conference Paper
Authors
Sunderland, Peter B.
(National Center for Microgravity Research on Fluids and Combustion Cleveland, OH United States)
Greenbberg, Paul S.
(NASA Glenn Research Center Cleveland, OH United States)
Urban, David L.
(NASA Glenn Research Center Cleveland, OH United States)
Wernet, Mark P.
(NASA Glenn Research Center Cleveland, OH United States)
Yanis, William
(National Center for Microgravity Research on Fluids and Combustion Cleveland, OH United States)
Date Acquired
August 20, 2013
Publication Date
May 1, 2001
Publication Information
Publication: Sixth International Microgravity Combustion Workshop
Subject Category
Inorganic, Organic And Physical Chemistry
Funding Number(s)
PROJECT: RTOP 101-12-0A
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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