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Can a starting vortex boost the turbulent transition of a Richtmyer-Meshkov instability-induced air/helium mixing zone?

Rasteiro Dos Santos, Marta and Bury, Yannick and Graumer, Pierre and Jamme, Stéphane Can a starting vortex boost the turbulent transition of a Richtmyer-Meshkov instability-induced air/helium mixing zone? (2019) In: 32nd International Symposium on Shock Waves (ISSW32), 14 July 2019 - 19 July 2019 (Singapore, Singapore).

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Official URL: http://rpsonline.com.sg/rps2prod/ISSW32/e-proceedings/html/0445.xml

Abstract

This work is part of the study of the turbulent mixture produced by the Richtmyer- Meshkov instability. It focuses on the characterization of the initial conditions and on their persistence when the mixing zone develops into a turbulent flow, in other words the so-called initial condition memory effect. A Direct Numerical Simulation of the flow arising from the rotation of series of blades initially separating two gases of different density is conducted. The analysis relies on the impact of the resulting vortical flow on the generation of a more or less diffused and disturbed initial gaseous interface as the rotational speed of the blades is varied. Results highlight different flow regimes, associated with the redistribution of the total vorticity between the different vortex cores promoted by the opening of the blades, as both the rotational speed and the gaseous medium in which the blade tips are moving into vary.

Item Type:Conference or Workshop Item (Paper)
HAL Id:hal-02353493
Audience (conference):International conference proceedings
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Institution:Université de Toulouse > Institut Supérieur de l'Aéronautique et de l'Espace - ISAE-SUPAERO (FRANCE)
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Deposited By: Yannick Bury
Deposited On:07 Nov 2019 11:28

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