Turbulence in cooling channels of rocket engines: Large Eddy Simulations

Cécile Münch; Olivier Métais

doi:10.1016/j.crme.2005.06.001

Turbulence in cooling channels of rocket engines: Large Eddy Simulations

Presented by: Marcel Lesieur

Cécile Münch ¹ ; Olivier Métais ¹

¹ L.E.G.I, BP 53, 38041 Grenoble cedex 09, France

Comptes Rendus. Mécanique, Volume 333 (2005) no. 7, pp. 574-579.

Abstract
Résumé

The aim of this Note is to predict by means of large eddy simulations the three-dimensional structures and secondary mass and heat fluxes which develop within a heated curved duct, for applications to rocket engines cooling channels. We show the existence of unsteady Görtler-type vortices above the concave wall, as well as intense secondary vortices taking the shape of two quasi-steady counter-rotating cells of Ekman type close to the convex wall. These cells control heat exchanges. They induce ejections and sweeps close to the convex wall when it is heated. In this case the Nusselt number undergoes strong transverse fluctuations which might induce material alterations.

L'objectif de cette Note est de prédire par simulation des grandes échelles les structures tridimensionnelles et les flux secondaires de masse et de chaleur se développant dans un conduit courbe chauffé, pour des applications aux canaux de refroidissement des moteurs de fusée. On montre l'existence de tourbillons instationnaires de type Görtler sur la paroi concave, ainsi que des tourbillons secondaires intenses formant deux cellules contra-rotatives quasi-stationnaires de type Ekman près de la paroi convexe. Ces cellules contrôlent les échanges thermiques. Elles induisent des mécanismes d'ejections et de balayages près de la paroi convexe quand elle est chauffée. Ceci provoque de fortes variations transverses du nombre de Nusselt qui pourraient conduire à une dégradation des matériaux.

Received: 2005-05-24
Accepted: 2005-05-30
Published online: 2005-07-01

DOI: 10.1016/j.crme.2005.06.001

Keywords: Turbulence, Heat transfer, Computational fluid mechanics
Mot clés : Turbulence, Transferts thermiques, Mécanique des fluides numérique

Author's affiliations:

Cécile Münch ¹; Olivier Métais ¹

¹ L.E.G.I, BP 53, 38041 Grenoble cedex 09, France

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     author = {C\'ecile M\"unch and Olivier M\'etais},
     title = {Turbulence in cooling channels of rocket engines: {Large} {Eddy} {Simulations}},
     journal = {Comptes Rendus. M\'ecanique},
     pages = {574--579},
     publisher = {Elsevier},
     volume = {333},
     number = {7},
     year = {2005},
     doi = {10.1016/j.crme.2005.06.001},
     language = {en},
}

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Cécile Münch; Olivier Métais. Turbulence in cooling channels of rocket engines: Large Eddy Simulations. Comptes Rendus. Mécanique, Volume 333 (2005) no. 7, pp. 574-579. doi : 10.1016/j.crme.2005.06.001. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2005.06.001/

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