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Valdiation of the k-ω Turbulence Model for the Thermal Turbulent Boundary Layer Profile of Effusive Cooled Walls

Hink, Rüdiger and Eggers, Thino (2014) Valdiation of the k-ω Turbulence Model for the Thermal Turbulent Boundary Layer Profile of Effusive Cooled Walls. Deutscher Luft- und Raumfahrt Kongress 2014, 16.-18. Sept. 2014, Augsburg.

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Official URL: http://www.dlrk2014.dglr.de/

Abstract

The choice of materials for rocket chamber walls is limited by its thermal resistance. The thermal loads can be reduced substantially by the blowing out of gases through a porous surface. The k-ω based turbulence models for computational fluid dynamic (CFD) simulations are designed for smooth, non-permeable walls and have to be adjusted to account for the influence of injected fluids. Wilcox proposed therefore an extension for the k-ω turbulence model for the correct prediction of turbulent boundary layer velocity profiles. In this study this extension is validated against experimental thermal boundary layer data from the Thermosciences Division of the Department of Mechanical Engineering from the Stanford University. All CFD simulations are performed with the finite volume based TAU code of the German Aerospace Center (DLR). Several simulations with different blowing settings were conducted and discussed in comparison to the results of the original model. Finally, the approach is applied to a two-dimensional simulation of an effusive cooled rocket chamber wall.

Item URL in elib:https://elib.dlr.de/92690/
Document Type:Conference or Workshop Item (Speech)
Title:Valdiation of the k-ω Turbulence Model for the Thermal Turbulent Boundary Layer Profile of Effusive Cooled Walls
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Hink, Rüdigerruediger.hink (at) dlr.deUNSPECIFIED
Eggers, Thinothino.eggers (at) dlr.deUNSPECIFIED
Date:September 2014
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Effusion cooling, transpiration cooling, rocket chambers, cooling technique
Event Title:Deutscher Luft- und Raumfahrt Kongress 2014
Event Location:Augsburg
Event Type:national Conference
Event Dates:16.-18. Sept. 2014
Organizer:Deutsche Gesellschaft für Luft- und Raumfahrt - Lilienthal-Oberth e.V.
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transport
DLR - Research area:Raumfahrt
DLR - Program:R RP - Raumtransport
DLR - Research theme (Project):R - Shefex III, R - VLM für Shefex
Location: Braunschweig
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Hink, Rüdiger Reiner
Deposited On:03 Dec 2014 14:21
Last Modified:03 Dec 2014 14:21

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