To deepen the knowledge of the interaction between modern lean burn combustors and high pressure turbines, a non-reactive real scale annular trisector Combustor Simulator (CS) has been assembled at University of Florence, with the goal of investigating and characterizing the combustor aerothermal field as well as the hot streak transport towards the high pressure vanes. To generate hot streaks and simulate lean burn combustor behaviors, the rig is equipped with axial swirlers fed by a main air flow stream that is heated up to 531 K, while liners with effusion cooling holes are fed by air at ambient temperature. Detailed experimental investigations are then performed with the aim of characterizing the turbulence quantities at the exit of the combustion module, and specifically evaluating an integral scale of turbulence. To do so, an automatic traverse system is mounted at the exit of the CS and equipped to perform Hot Wire Anemometry (HWA) measurements. In this paper, two-point correlations are computed from the time signal of the axial velocity giving access to an evaluation of the turbulence timescales at each measurement point. For assessment of the advanced numerical method that is Large Eddy Simulation (LES), the same methodology is applied to a LES prediction of the CS. Although comparisons seem relevant and easily accessible, both approaches and contexts have fundamental differences: mostly in terms of duration of the signals acquired experimentally and numerically but also with potentially different acquisition frequencies. In the exercise that aims at comparing high-order statistics and diagnostics, the specificity of comparing experimental and numerical results is comprehensively discussed. Attention is given to the importance of the acquisition frequency, intrinsic bias of having a short duration signal and influence of the investigating windows. For an adequate evaluation of the turbulent time scales, it is found that comparing experiments and numerics for high Reynolds number flows inferring small-scale phenomena requires to obey a set of rules, otherwise important errors can be made. If adequately processed, LES and HWA are found to agree well indicating the potential of LES for such problems.
Skip Nav Destination
Close
Sign In or Register for Account
ASME Turbo Expo 2015: Turbine Technical Conference and Exposition
June 15–19, 2015
Montreal, Quebec, Canada
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-5673-4
PROCEEDINGS PAPER
Experimental and Numerical Calculation of Turbulent Timescales at the Exit of an Engine Representative Combustor Simulator
Charlie Koupper,
Charlie Koupper
Turbomeca, Bordes, France
CERFACS, Toulouse, France
Search for other works by this author on:
Tommaso Bacci,
Tommaso Bacci
University of Florence, Florence, Italy
Search for other works by this author on:
Bruno Facchini,
Bruno Facchini
University of Florence, Florence, Italy
Search for other works by this author on:
Alessio Picchi,
Alessio Picchi
University of Florence, Florence, Italy
Search for other works by this author on:
Lorenzo Tarchi,
Lorenzo Tarchi
University of Florence, Florence, Italy
Search for other works by this author on:
Laurent Gicquel,
Laurent Gicquel
CERFACS, Toulouse, France
Search for other works by this author on:
Florent Duchaine,
Florent Duchaine
CERFACS, Toulouse, France
Search for other works by this author on:
Guillaume Bonneau
Guillaume Bonneau
Turbomeca, Bordes, France
Search for other works by this author on:
Charlie Koupper
Turbomeca, Bordes, France
CERFACS, Toulouse, France
Tommaso Bacci
University of Florence, Florence, Italy
Bruno Facchini
University of Florence, Florence, Italy
Alessio Picchi
University of Florence, Florence, Italy
Lorenzo Tarchi
University of Florence, Florence, Italy
Laurent Gicquel
CERFACS, Toulouse, France
Florent Duchaine
CERFACS, Toulouse, France
Guillaume Bonneau
Turbomeca, Bordes, France
Paper No:
GT2015-42278, V05CT17A003; 12 pages
Published Online:
August 12, 2015
Citation
Koupper, C, Bacci, T, Facchini, B, Picchi, A, Tarchi, L, Gicquel, L, Duchaine, F, & Bonneau, G. "Experimental and Numerical Calculation of Turbulent Timescales at the Exit of an Engine Representative Combustor Simulator." Proceedings of the ASME Turbo Expo 2015: Turbine Technical Conference and Exposition. Volume 5C: Heat Transfer. Montreal, Quebec, Canada. June 15–19, 2015. V05CT17A003. ASME. https://doi.org/10.1115/GT2015-42278
Download citation file:
- Ris (Zotero)
- Reference Manager
- EasyBib
- Bookends
- Mendeley
- Papers
- EndNote
- RefWorks
- BibTex
- ProCite
- Medlars
Close
Sign In
11
Views
0
Citations
Related Proceedings Papers
Related Articles
Computational Study of a Midpassage Gap and Upstream Slot on Vane Endwall Film-Cooling
J. Turbomach (January,2011)
Subgrid Scale Combustion Modeling Based on Stochastic Model Parameterization
J. Eng. Gas Turbines Power (March,2012)
Air Flow Modulation for Refined Control of the Combustion Dynamics Using a Novel Actuator
J. Eng. Gas Turbines Power (February,2012)
Related Chapters
Outlook
Closed-Cycle Gas Turbines: Operating Experience and Future Potential
Cavitating Structures at Inception in Turbulent Shear Flow
Proceedings of the 10th International Symposium on Cavitation (CAV2018)
Combined Cycle Power Plant
Energy and Power Generation Handbook: Established and Emerging Technologies