Comparison of high speed PIV experiments, unsteady pressure measurements and DES computations of a transonic Ariane 5 base-flow using POD: An experimental study

Ferdinand Schrijer, T. Horchler, S Deck, Paul van Gent

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientific

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Abstract

The present work is conducted in the framework of the ESA TRP “Launcher Base Flows and Shock Interactions Regions Improved Load Characterization”, where high speed PIV measurements and unsteady pressure measurements performed in the DNW-HST on a 1:60 scale Ariane 5 are compared to simulations using IDDES and ZDES for the same configuration and flow conditions. The goal of the investigation is to identify how well the computations are capable of predicting the salient features of the transonic buffeting phenomenon. In order to make a valid comparison, it is confirmed that both the experimental as well as the numerical data is properly converged in order to extract flow statistics. It is found that due to the spatial filtering inherent to the PIV processing the measured velocity fluctuations are modulated. Furthermore a POD analysis shows that both the numerics and the experiments return the same modes (both for velocity field and pressure distribution) which indicates that both approaches contain similar large scale flow dynamics.
Original languageEnglish
Title of host publication7th European Conference For Aeronautics And Space Sciences
Subtitle of host publicationMilan, Italy
Number of pages10
Publication statusPublished - 2017
Event7th European Conference For Aeronautics And Space Sciences - Milan, Italy
Duration: 3 Jul 20176 Jul 2017
Conference number: 7
http://www.eucass2017.eu/

Conference

Conference7th European Conference For Aeronautics And Space Sciences
Abbreviated title EUCASS 2017
CountryItaly
CityMilan
Period3/07/176/07/17
Internet address

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