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Quantitative Flow Imaging of Film Cooling Jets in a Cross-flow using Particle Image Velocimetry and Computational Fluid Dynamics

Brakmann, Robin and Schroll, Michael and Schöffler, Robin and Kocian, Frank and Willert, Christian and Müller, Martin and Kügeler, Edmund (2020) Quantitative Flow Imaging of Film Cooling Jets in a Cross-flow using Particle Image Velocimetry and Computational Fluid Dynamics. In: Proceedings of the ASME Turbo Expo 2018. Proceedings of the ASME 2020 Turbo Expo: Turbomachinery Technical Conference & Exposition, June 22-26, 2020, London, United Kingdom.

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Abstract

The investigated generic configuration consists of cylindrical film cooling holes with a diameter of D = 8:4 mm and an inclination angle of alpha = 35°. The jets are characterized by a momentum flux ratio of I = 0.63, a density ratio of DR = 0.94 and a cross-flow Reynolds number of Re = 5500. Stereoscopic PIV allows creating a (pseudo) three dimensional image of the flow field. High resolution PIV is used to evaluate velocity fluctuations. The numerical model uses the SST and an EARSM turbulence model. The turbulent scalar fluxes are computed by a constant turbulent Prandtl number as well as algebraic models for the turbulent heat flux. The presented results consist of field cuts and line profiles of the velocity, vorticity and turbulent kinetic energy. All considered numerical options can predict the velocity field accurately, the SST turbulence model is the numerically most stable model and has the lowest demands in computational costs.

Item URL in elib:https://elib.dlr.de/137002/
Document Type:Conference or Workshop Item (Speech)
Title:Quantitative Flow Imaging of Film Cooling Jets in a Cross-flow using Particle Image Velocimetry and Computational Fluid Dynamics
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Brakmann, RobinRobin.Brakmann (at) dlr.deUNSPECIFIED
Schroll, MichaelMichael.Schroll (at) dlr.deUNSPECIFIED
Schöffler, RobinRobin.Schoeffler (at) dlr.deUNSPECIFIED
Kocian, FrankFrank.Kocian (at) dlr.deUNSPECIFIED
Willert, ChristianChris.Willert (at) dlr.dehttps://orcid.org/0000-0002-1668-0181
Müller, MartinMartin.Mueller (at) dlr.deUNSPECIFIED
Kügeler, EdmundEdmund.Kuegeler (at) dlr.dehttps://orcid.org/0000-0002-9719-626X
Date:2020
Journal or Publication Title:Proceedings of the ASME Turbo Expo 2018
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Status:Published
Keywords:film cooling, CFD, PIV, heat transfer, turbomachinery cooling
Event Title:Proceedings of the ASME 2020 Turbo Expo: Turbomachinery Technical Conference & Exposition
Event Location:London, United Kingdom
Event Type:international Conference
Event Dates:June 22-26, 2020
Organizer:ASME
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:propulsion systems
DLR - Research area:Aeronautics
DLR - Program:L ER - Engine Research
DLR - Research theme (Project):L - Turbine Technologies (old), E - Gas Turbine (old)
Location: Göttingen
Institutes and Institutions:Institute of Propulsion Technology > Turbine
Deposited By: Brakmann, Robin
Deposited On:02 Nov 2020 10:44
Last Modified:02 Nov 2020 10:44

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