- Author
-
Tieszen, S. R.
|
O'Hern, T. J.
|
Schefer, R. W.
|
Perea, L. D.
- Title
- Spatial and Temporal Resultion of Fluid Flows: Laboratory Directed Research and Development (LDRD). Final Report.
- Coporate
- Sandia National Labs., Albuquerque, NM
- Report
-
SAND98-0338,
Feburary 1998,
101 p.
- Distribution
- AVAILABLE FROM National Technical Information Service (NTIS), Technology Administration, U.S. Department of Commerce, Springfield, VA 22161. Telephone: 1-800-553-6847 or 703-605-6000; Fax: 703-605-6900; Rush Service (Telephone Orders Only) 800-553-6847; Website: http://www.ntis.gov
- Keywords
-
fluid flows
|
plumes
|
equipment
|
test methods
|
chimneys
- Identifiers
- Laboratory Directed Research and Development (LDRD); Particle Image Velocimetry (PIV); Planar Laser Induced Fluorescence (PLIF); FLAME building; chimney exhaust; boundary condition diagnostics; non-reacting test; reacting test; diagnostic development tests
- Abstract
- This report describes a Laboratory Directed Research and Development (LDRD) activity to develop a diagnostic technique for simultaneous temporal and spatial resolution of fluid flows. The goal is tb obtain two orders of magnitude resolution in two spatial dimensions and time simultaneously. The approach used in this study is to scale up Particle Image Velocimetry (PIV) and Planar Laser Induced Fluorescence (PLIF) to acquire meter-size images at up to 200 frames/sec. Experiments were conducted in buoyant, fully turbulent, non-reacting and reacting plumes with a base diameter of one meter. The PIV results were successful in the ambient gas for all flows, and in the plume for non-reacting helium and reacting methane, but not reacting hydrogen. No PIV was obtained in the hot combustion product region as the seed particles chosen vaporized. Weak signals prevented PLIF in the helium. However, in reacting methane flows, PLIF images speculated to be from Poly-Aromatic-Hydrocarbons were obtained which mark the flame sheets. The results were unexpected and very insightful. A natural fluorescence from the seed particle vapor was also noted in the hydrogen tests.