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Active Control of Dual-Bell Nozzle Operation Mode Transition by Film Cooling and Mixture Ratio Variation

Schneider, Dirk and Stark, Ralf and Génin, Chloé and Oschwald, Michael and Kostyrkin, Konstantin (2020) Active Control of Dual-Bell Nozzle Operation Mode Transition by Film Cooling and Mixture Ratio Variation. Journal of Propulsion and Power. American Institute of Aeronautics and Astronautics (AIAA). DOI: 10.2514/1.B37299 ISSN 0748-4658

Full text not available from this repository.

Official URL: https://arc.aiaa.org/doi/pdf/10.2514/1.B37299

Abstract

A numerical study is conducted to investigate the impact of a film-cooled dual-bell nozzle extension on its operation mode transition behavior. Therefore, unsteady Reynolds-averaged Navier–Stokes simulations of the transition process between the sea level and altitude modes are carried out. The investigated dual-bell nozzle model is fed with hot gas by a combustion chamber using liquid oxygen as oxidizer and gaseous hydrogen as fuel. Upstream of the dual-bell nozzle contour inflection, gaseous hydrogen is injected as cooling fluid for the nozzle extension wall. The numerical studies yield a clear impact of the cooling fluid mass flow rate on the transition nozzle pressure ratio of the dual-bell nozzle. The increase of the cooling fluid mass flow rate leads to a shift of the dual-bell transition nozzle pressure ratio to lower values. Furthermore, the impact of the combustion chamber mixture ratio on the dual-bell operation mode transition is investigated. A clear shift to lower transition nozzle pressure ratio values due to higher propellant mixture ratios can be observed. A combination of the two effects is introduced for an active control of the dual-bell operation mode transition.

Item URL in elib:https://elib.dlr.de/131275/
Document Type:Article
Title:Active Control of Dual-Bell Nozzle Operation Mode Transition by Film Cooling and Mixture Ratio Variation
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Schneider, DirkDirk.Schneider (at) dlr.dehttps://orcid.org/0000-0002-4785-4244
Stark, RalfRalf.Stark (at) dlr.dehttps://orcid.org/0000-0003-1923-1901
Génin, ChloéChloe.Genin (at) dlr.dehttps://orcid.org/0000-0002-5752-0643
Oschwald, MichaelMichael.Oschwald (at) dlr.dehttps://orcid.org/0000-0002-9579-9825
Kostyrkin, KonstantinRWTH Aachen University, DUNSPECIFIED
Date:2020
Journal or Publication Title:Journal of Propulsion and Power
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
DOI :10.2514/1.B37299
Publisher:American Institute of Aeronautics and Astronautics (AIAA)
ISSN:0748-4658
Status:Accepted
Keywords:dual bell nozzle, film cooling, nozzle flow
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):Proj TAUROS (TAU for Rocket Thrust Chamber Simulation)
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion > Rocket Propulsion
Deposited By: Hanke, Michaela
Deposited On:28 Nov 2019 09:21
Last Modified:28 Nov 2019 09:21

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