Planar laser-induced fluorescence (PLIF) with acetone seeding was applied to measure the scalar fields of an axisymmetric freejet and an inclined jet in crossflow as applicable to film cooling. From the scalar fields, jet-mixing and trajectory characteristics were obtained. In order to validate the technique, the canonical example of a nonreacting freejet of Reynolds numbers 900–9000 was investigated. Desired structural characteristics were observed and showed strong agreement with computational modeling. After validating the technique with the axisymmetric jet, the jet in crossflow was tested with various velocity ratios and jet injection angles. Results indicated the degree of wall separation for different injection angles and demonstrated both the time-averaged trajectories as well as select near-wall concentration results for varying jet momentum fluxes. Consistent with literature findings, the orthogonal jet trajectory for varying blowing ratios collapsed when scaled by the jet-to-freestream velocity ratio and hole diameter, rd. Similar collapsing was demonstrated in the cases of a nonorthogonal jets. Computational fluid dynamic (CFD) simulations using the openfoam software were used to compare predictions with select experimental cases and yielded reasonable agreement. Insight into the importance and structure of the counter-rotating vortex pair (CVP) and general flow field turbulence was highlighted by cross validation between CFD and experimental results.
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August 2016
Research-Article
Planar Laser-Induced Fluorescence Experiments and Modeling Study of Jets in Crossflow
Luke Thompson,
Luke Thompson
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: lukezt@knights.ucf.edu
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: lukezt@knights.ucf.edu
Search for other works by this author on:
Greg Natsui,
Greg Natsui
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: gnatsui@knights.ucf.edu
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: gnatsui@knights.ucf.edu
Search for other works by this author on:
Carlos Velez,
Carlos Velez
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: velezcar@yahoo.com
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: velezcar@yahoo.com
Search for other works by this author on:
Jayanta Kapat,
Jayanta Kapat
Professor
Mem. ASME
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: Jayanta.Kapat@ucf.edu
Mem. ASME
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: Jayanta.Kapat@ucf.edu
Search for other works by this author on:
Subith S. Vasu
Subith S. Vasu
Professor
Mem. ASME
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: subith@ucf.edu
Mem. ASME
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: subith@ucf.edu
Search for other works by this author on:
Luke Thompson
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: lukezt@knights.ucf.edu
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: lukezt@knights.ucf.edu
Greg Natsui
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: gnatsui@knights.ucf.edu
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: gnatsui@knights.ucf.edu
Carlos Velez
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: velezcar@yahoo.com
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: velezcar@yahoo.com
Jayanta Kapat
Professor
Mem. ASME
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: Jayanta.Kapat@ucf.edu
Mem. ASME
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: Jayanta.Kapat@ucf.edu
Subith S. Vasu
Professor
Mem. ASME
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: subith@ucf.edu
Mem. ASME
Center for Advanced Turbomachinery and
Energy Research (CATER),
Department of Mechanical and
Aerospace Engineering,
University of Central Florida,
12760 Pegasus Boulevard,
P.O. Box 162450,
Orlando, FL 32816
e-mail: subith@ucf.edu
1Corresponding author.
Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received May 16, 2015; final manuscript received December 27, 2015; published online April 22, 2016. Assoc. Editor: Feng Liu.
J. Fluids Eng. Aug 2016, 138(8): 081201 (12 pages)
Published Online: April 22, 2016
Article history
Received:
May 16, 2015
Revised:
December 27, 2015
Citation
Thompson, L., Natsui, G., Velez, C., Kapat, J., and Vasu, S. S. (April 22, 2016). "Planar Laser-Induced Fluorescence Experiments and Modeling Study of Jets in Crossflow." ASME. J. Fluids Eng. August 2016; 138(8): 081201. https://doi.org/10.1115/1.4032581
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