Abstract
| Language | English |
|---|---|
| Title of host publication | Proceedings - 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics : from 9 to 12 of July ; Lisbon 2012 |
| Place of Publication | Lisbon |
| Publisher | Instituto Superior Técnico |
| Publication status | Published - 12 Jul 2012 |
| Externally published | Yes |
| Event | International Symposium on Applications of Laser Techniques to Fluid Mechanics - The Calouste Gulbenkian Foundation, Lisbon, Portugal Duration: 9 Jul 2012 → 12 Jul 2012 http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2012/index.asp (Link to Conference Website) |
Conference
| Conference | International Symposium on Applications of Laser Techniques to Fluid Mechanics |
|---|---|
| Country | Portugal |
| City | Lisbon |
| Period | 9/07/12 → 12/07/12 |
| Internet address |
|
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Experimental Assessment of ‘subgrid’ scale Probability Density Function Models for Large Eddy Simulation. / Stetsyuk, Viacheslav; Hardalupas, Y.; Taylor, Alex; Soulopoulos, Nikolaos.
Proceedings - 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics : from 9 to 12 of July ; Lisbon 2012. Lisbon : Instituto Superior Técnico, 2012.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
TY - GEN
T1 - Experimental Assessment of ‘subgrid’ scale Probability Density Function Models for Large Eddy Simulation
AU - Stetsyuk, Viacheslav
AU - Hardalupas, Y.
AU - Taylor, Alex
AU - Soulopoulos, Nikolaos
PY - 2012/7/12
Y1 - 2012/7/12
N2 - Filtered density functions (FDFs) of mixture fraction are quantified by analyzing experimental data obtained from two-dimensional planar laser-induced fluorescence scalar measurements in the isothermal swirling flow of a combustor operating at a Reynolds number of 28,662 for three different swirl numbers (0.3, 0.58 and 1.07). Two-dimensional filtering using a box filter was performed on the measured scalar to obtain the filtered variables used for presumed β -FDF and top-hat FDF for Large Eddy Simulations (LES). A dependant variable from the measured scalar, which was a pre-computed temperature, was integrated over the experimentally obtained FDF as well as over the presumed beta or top-hat FDFs and a relative error in temperature prediction was calculated. The experimentally measured FDFs depended on swirl numbers and axial and radial positions in the flow. The FDFs were unimodal in the regions of low variance and bimodal in the regions of high variance. The influence of the filter spatial dimension on the measured FDF was evaluated and consequences for Subgrid modeling for LES discussed.
AB - Filtered density functions (FDFs) of mixture fraction are quantified by analyzing experimental data obtained from two-dimensional planar laser-induced fluorescence scalar measurements in the isothermal swirling flow of a combustor operating at a Reynolds number of 28,662 for three different swirl numbers (0.3, 0.58 and 1.07). Two-dimensional filtering using a box filter was performed on the measured scalar to obtain the filtered variables used for presumed β -FDF and top-hat FDF for Large Eddy Simulations (LES). A dependant variable from the measured scalar, which was a pre-computed temperature, was integrated over the experimentally obtained FDF as well as over the presumed beta or top-hat FDFs and a relative error in temperature prediction was calculated. The experimentally measured FDFs depended on swirl numbers and axial and radial positions in the flow. The FDFs were unimodal in the regions of low variance and bimodal in the regions of high variance. The influence of the filter spatial dimension on the measured FDF was evaluated and consequences for Subgrid modeling for LES discussed.
KW - PLIF
KW - FDF
KW - LES
KW - subgrid
UR - http://ltces.dem.ist.utl.pt/lxlaser/lxlaser2012/index.asp
M3 - Conference contribution
BT - Proceedings - 16th International Symposium on Applications of Laser Techniques to Fluid Mechanics : from 9 to 12 of July ; Lisbon 2012
PB - Instituto Superior Técnico
CY - Lisbon
ER -