PIV MEASUREMENTS IN A HIGH-SPEED LOW-REYNOLDS LOW-PRESSURE TURBINE CASCADE

Okada, Mizuki; Simonassi, Loris; Do Carmo Lopes, Gustavo Filipe; Lavagnoli, Sergio

doi:10.1115/1.4063674

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PIV MEASUREMENTS IN A HIGH-SPEED LOW-REYNOLDS LOW-PRESSURE TURBINE CASCADE

Okada, Mizuki; Simonassi, Loris; Do Carmo Lopes, Gustavo Filipe et al.

2023 • In Journal of Turbomachinery, p. 1-38

Editorial reviewed Dataset

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https://hdl.handle.net/2268/309831

DOI
10.1115/1.4063674

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Keywords :

Mechanical Engineering

Abstract :

[en] Particle image velocimetry (PIV) measurements in the blade-to-blade (B2B) plane and cascade outlet plane (COP) of a high-speed low-pressure turbine (LPT) cascade were performed at engine-representative outlet Mach number (0.70-0.95), and Reynolds number (70k-120k) under steady flow conditions. The freestream turbulence characteristics were imposed by means of a passive turbulence grid. The PIV results on the B2B plane were compared against five-hole probe (5HP) and Reynolds-averaged Navier-Stokes (RANS) computations to assess the validity of measurement and simulation techniques in the engine-relevant LPT cascade flows. The PIV captured the wake depth and width measured by the 5HP whereas the RANS displayed an overprediction of the wake Mach number deficit. The 5HP was found to impose sinewave fluctuations of the measured flow angle downstream, around three times higher than PIV. Additionally, PIV estimated turbulence intensity (TI) in the cascade, showing TI decay along a streamline. At the highest Mach number, a peak TI occurred past a shock wave. Measurements of the outlet flow field highlighted a high TI in the secondary flow region whereas high degree of anisotropy (DA) was registered in the boundary of the secondary flow and freestream regions. The contribution of the streamwise fluctuation component was found to be less than the crosswise and radial components in the freestream region. Increasing the cascade outlet Mach number, the contribution of streamwise fluctuation to the DA was observed to decrease.

Disciplines :

Aerospace & aeronautics engineering

Author, co-author :

Okada, Mizuki; Waterloosesteenweg 72 Sint-Genesius-Rode, 1640 Belgium

Simonassi, Loris; Via I° Maggio, 99 Turin, Rivalta di Torino 10040 Italy

Do Carmo Lopes, Gustavo Filipe ; Université de Liège - ULiège > Aérospatiale et Mécanique (A&M)

Lavagnoli, Sergio; Chaussee de Waterloo 72 Rhode Saint Genese, Brabant 1640 Belgium

Language :

English

Title :

PIV MEASUREMENTS IN A HIGH-SPEED LOW-REYNOLDS LOW-PRESSURE TURBINE CASCADE

Publication date :

05 October 2023

Journal title :

Journal of Turbomachinery

ISSN :

0889-504X

eISSN :

1528-8900

Publisher :

ASME International

Pages :

1-38

Peer reviewed :

Editorial reviewed

Additional URL :

https://asmedigitalcollection.asme.org/turbomachinery/article-pdf/doi/10.1115/1.4063674/7048779/turbo-23-1178.pdf

Funders :

CSJU - Clean Sky Joint Undertaking

Funding text :

The authors gratefully acknowledge funding of the SPLEEN project by the Clean Sky 2 Joint Undertaking under the European Unions Horizon 2020 research and innovation program under grant agreement 820883. The authors would also like to thank Antonino Federico Maria Torre, Davide Miglio, and Cosimo Pulieri for setting up the RANS computations, as well as Julien Desset and Gerard Goossens for supporting the modifications of the test rig and test section for optical measurements.

Data Set :

SPLEEN - High Speed Turbine Cascade – Test Case Database - PIV Measurements

Available on ORBi :

since 14 December 2023

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