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Fluid dynamics and intrinsic flow properties of effusion cooled CMC structures in liquid rocket engines

Greuel, D. und Gernoth, A. und Koschel, W. (2011) Fluid dynamics and intrinsic flow properties of effusion cooled CMC structures in liquid rocket engines. In: Proceedings. 4TH EUROPEAN CONFERENCE FOR AEROSPACE SCIENCES, 4. - 8. Jul. 2011, St. Petersburg, Russia.

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Kurzfassung

The state-of-the-art of coolant flow modelling for effusion cooled CMC thrust chamber liners in liquid rocket engines is briefly reviewed. CFD studies of the effusion cooling process clearly show that common models for flow through porous media are not able to precisely predict the local coolant mass flow rates emerging from the hot gas side wall surface along an effusion cooled liner. In order to adapt existing CFD tools for the modelling of the compressible coolant flow through porous CMC micro structures, their anisotropic flow and heat transfer properties (permeability, area porosity, tortuosity, mean hydraulic pore diameter, thermal conductivity, convective heat transfer coefficient, inner pore surface) must be entered in the software. In this study several test series with various diffusion fluids and material samples have been conducted in order to determine the tortuosity of C/C material by means of the diffusion theory in porous media. The diffusion of the fluids in the C/C material has been investigated in two configurations, i.e. with the fibre orientation perpendicular and parallel relative to the vector of the 1D diffusive flow. The experimental setup for the diffusive flow measurement and some exemplary results are presented. The tests showed that the tortuosity is independent of the fluid media but is strongly dependent of the inclination angle between the fibre orientation and the flow direction.

Dokumentart:Konferenzbeitrag (Vortrag, Paper)
Titel:Fluid dynamics and intrinsic flow properties of effusion cooled CMC structures in liquid rocket engines
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Greuel, D.Dirk.Greuel@dlr.de
Gernoth, A.Andreas.Gernoth@dlr.de
Koschel, W.Wolfgang.Koschel@dlr.de
Datum:2011
Erschienen in:Proceedings
Status:veröffentlicht
Stichwörter:modelling, thrust chamber
Veranstaltungstitel:4TH EUROPEAN CONFERENCE FOR AEROSPACE SCIENCES
Veranstaltungsort:St. Petersburg, Russia
Veranstaltungsart:internationale Konferenz
Veranstaltungsdatum:4. - 8. Jul. 2011
Veranstalter :EUCASS
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W RP - Raumtransport
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W RP - Raumtransport
DLR - Teilgebiet (Projekt, Vorhaben):W - Antriebsystemtechnik - Schubkammertechnologie und Hochdruckverbrennung (alt)
Standort: Lampoldshausen
Institute & Einrichtungen:Institut für Raumfahrtantriebe > Technologie
Institut für Raumfahrtantriebe > Treibstoffe
Hinterlegt von: Michaela Hanke
Hinterlegt am:07 Dez 2011 13:46
Letzte Änderung:07 Dez 2011 13:46

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