• Turbomachinery and Propulsion Department

    To solve problematics of aircraft engines
  • 1

Instrumentation

- FRAP’s (pressure & hot wire)
- Optical tools
- Qualification and Optimization of PT/TT probes
- PT probes in severe environment

 

New collaboration framework between VKI and DANTEC DYNAMICS

Post-processing tools for Particle Image Velocimetry (PIV)The von Karman Institute and Dantec Dynamics have signed in May 2019 an agreement to set up a long-term cooperation on several fields of experimental fluid mechanics. The collaboration aims at the joint development of improved methods and measurement solutions.

Dantec Dynamics (https://www.dantecdynamics.com/) delivers turnkey and customized solutions built on high-end laser optics, imaging, and electronical sensor technologies, and has over 70 years of experience in experimental fluid and solid mechanics.

The first research project aims at developing advanced pre-processing and post-processing tools for Particle Image Velocimetry (PIV), based on data-driven modal analysis. The first benchmark test case, recently measured at the VKI, consists of the flow past a cylinder in accelerating conditions, producing the famous Karman Street in non-stationary conditions. This flow has been analyzed using the recently proposed Multiscale Proper Orthogonal Decomposition (mPOD).

Time Resolved PIV (TR-PIV) of an accelerating Karman vortex street

mPOD based modal analysis
Time Resolved PIV (TR-PIV) of an accelerating Karman vortex street and mPOD based modal analysis; measurements performed by D. Hess (Dantec Dynamics) and
M. Mendez (VKI). Top Left figure: vorticity field revealing the Karman street.


The article ' Multiscale Proper Orthogonal Decomposition (mPOD) of TR-PIV data-- a Case Study on Stationary and Transient Cylinder Wake Flows' has been published in June 2020: https://iopscience.iop.org/article/10.1088/1361-6501/ab82be/meta. This article has been selected to receive Measurement Science and Technology’s Outstanding Paper Award for 2020 in the field of Fluid mechanics and is the result  from the collaboration between the von Karman Institute (Miguel Mendez and Jean-Marie Buchlin) and Dantec Dynamics (David Hess and Bo Watz) on the development of data processing methods for PIV. In this work, we test the mPOD for Time-Resolved PIV measurements of a cylinder flow in transient conditions, with Reynolds number varying from 4000 to 2600 within a few seconds. PIV measurements were carried out at a sampling frequency of 3000 Hz and captured the vortex shedding's transient evolution.

The reprint of this article is available on ResearchGate: https://www.researchgate.net/publication/340150996_Multiscale_proper_orthogonal_decomposition_mPOD_of_TR-PIV_data--_a_case_study_on_stationary_and_transient_cylinder_wake_flows

The mPOD is designed to achieve a compromise between decomposition convergence and spectral purity of the resulting modes. In this work, the mPOD reveals the frequency jitter phenomenon in the stationary wake and identify the various phases of the wave evolution in the transient test case.

Multiscale proper orthogonal decomposition (mPOD) of TR-PIV data

 

Research Manager

Professor in the Environmental and Applied Fluid Dynamics Department

Faculty - TU

Frank Eulitz

Professor and Head of Department

Fabrizio Fontaneto

Associate Professor

Sergio Lavagnoli

Associate Professor

Tom Verstraete

Professor

 
Koen Hillewaert

Adjunct Professor from University of Liège

Sina Stapelfeldt

Adjunct Professor from Imperial College London, United Kingdom

Greg Dimitriadis

Adjunct Professor from University of Liège, Belgium

Harika Senem Kahveci

Visiting Professor from Middle East Technical University, Türkiye  

CACAO FERREIRA Tania Sofia (*)

DAS NEVES CARNEIRO Gonçalo 

*Collaborative Post Doc

Bruno BARATA 
Federico BERTELLI 
Bora Orcun CAKIR (til end Oct 24)
Peter CASSIDY
Marco CASTALDI 
Lorenzo DA VALLE 
Tom DE BRUYN 
Andre DIETZ 
Giovanni DI LUCIA 
Alexandre HALBY 
Julien HEINE 
HOANG Duc Huy Marco (*)
JOHNSON Rejish Lal (*)
LOIR Victor
LOPES Gustavo
PASTORINO Giacomo
PEREZ BARCENA Jorge
PLATINI Stefano
RAGHAV Sunny
TENE HEDJE Patrick (*)
TRAN Thanh Son (ARE)
VAN DEN BORRE Karel
ZAMMIT Enrico
ZAMPINI Luca

*Collaborative PhD

BORGES Nuno
CECCHINI Samuele
CHATZOPOULOS Petros
CHIANTESE Felice
FISCHER Alice
GATTO Samuele
GIESKE Endino
GOKENIS Furkan
GÜCLÜ Hasan Berk
PETTINATO Federico
TINI Andrea