Film cooling is extensively used to provide protection against the severe thermal environment in gas turbine engines. Most of the computational studies on film cooling flow have been done using steady Reynolds-Averaged Navier-Stokes (RANS) calculation procedures. However, the turbulent stress field is highly anisotropic in the wake region of the coolant jet, and the inherent unsteadiness of the coolant jet-crossflow interactions may have important implications in the cooling performance. In this paper, a computational investigation about the unsteady behavior of jet-in-crossflow applications is performed using DES. Detailed computation of a single row of 35 degree round holes on a flat plate has been obtained for a blowing ratio of 1.0 and a density ratio of 2.0. Firstly, time step size, grid resolution tests have been conducted. Comparison of the time-averaged DES prediction with the measured film cooling effectiveness shows that DES prediction is reasonable. From present simulations, the typical coherent vortical structures of the jet-in-crossflows can be seen. The unsteady physics of jet-in-crossflow interactions and a jet liftoff in film cooling flows have been explored.
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ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference
July 8–12, 2007
Vancouver, British Columbia, Canada
Conference Sponsors:
- Heat Transfer Division
ISBN:
0-7918-4276-2
PROCEEDINGS PAPER
Unsteady Simulation of Film Cooling Flow From an Inclined Cylindrical Jet Available to Purchase
Sung In Kim,
Sung In Kim
Concordia University, Montreal, QC, Canada
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Ibrahim G. Hassan,
Ibrahim G. Hassan
Concordia University, Montreal, QC, Canada
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Xuezhi Zhang
Xuezhi Zhang
Concordia University, Montreal, QC, Canada
Search for other works by this author on:
Sung In Kim
Concordia University, Montreal, QC, Canada
Ibrahim G. Hassan
Concordia University, Montreal, QC, Canada
Xuezhi Zhang
Concordia University, Montreal, QC, Canada
Paper No:
HT2007-32401, pp. 581-589; 9 pages
Published Online:
August 24, 2009
Citation
Kim, SI, Hassan, IG, & Zhang, X. "Unsteady Simulation of Film Cooling Flow From an Inclined Cylindrical Jet." Proceedings of the ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference collocated with the ASME 2007 InterPACK Conference. ASME/JSME 2007 Thermal Engineering Heat Transfer Summer Conference, Volume 3. Vancouver, British Columbia, Canada. July 8–12, 2007. pp. 581-589. ASME. https://doi.org/10.1115/HT2007-32401
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