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Boundary layer combustion visualization in hybrid rocket engines

Repossi, Rebecca Carlotta Libera and Petrarolo, Anna and Galfetti, Luciano and Ciezki, Helmut (2022) Boundary layer combustion visualization in hybrid rocket engines. In: Space Propulsion Conference 2022. Space Propulsion Conference 2022, 09-13 May 2022, Estoril, Portugal.

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Abstract

The present research focuses on the development of an optical testing routine and a combined improved analysis methodology. The final aim is the characterization of the combustion process in a detailed way, thus getting insights into the complex phenomena taking place within a hybrid engine. A pre-existing optical combustion chamber has been improved by adding a newly designed flow conditioning system, whose scope is to settle down the oxidizer flow and reduce its vorticity and inhomogeneities before entering the main chamber. The set-up has been validated through a test campaign, carried out at the German Aerospace Center (DLR) in Lampoldshausen. Moreover, a code for the high-speed video analysis, based on the combination of K-means clustering and image segmentation, has been developed. At the end of the algorithm, the flame and fuel profiles are reconstructed for each frame, thus obtaining the flame thickness and the slab regression rate evolutions during combustion.

Item URL in elib:https://elib.dlr.de/186980/
Document Type:Conference or Workshop Item (Speech)
Title:Boundary layer combustion visualization in hybrid rocket engines
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Repossi, Rebecca Carlotta LiberaPolitecnico di MilanoUNSPECIFIED
Petrarolo, AnnaAnna.Petrarolo (at) dlr.dehttps://orcid.org/0000-0002-2291-2874
Galfetti, Lucianoluciano.galfetti (at) polimi.itUNSPECIFIED
Ciezki, HelmutHelmut.Ciezki (at) dlr.dehttps://orcid.org/0000-0002-1539-4677
Date:2022
Journal or Publication Title:Space Propulsion Conference 2022
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Accepted
Keywords:hybrid rocket engine, liquefying fuels, flow conditioning system, K-means clustering, Kelvin-Helmholtz instability, entrainment, Background Oriented Schlieren, optical techinques
Event Title:Space Propulsion Conference 2022
Event Location:Estoril, Portugal
Event Type:international Conference
Event Dates:09-13 May 2022
Organizer:3AF
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Transportation
DLR - Research area:Raumfahrt
DLR - Program:R RP - Space Transportation
DLR - Research theme (Project):R - Agile development of advanced rocket propulsion systems
Location: Lampoldshausen
Institutes and Institutions:Institute of Space Propulsion
Deposited By: Petrarolo, Anna
Deposited On:29 Jun 2022 09:02
Last Modified:29 Jun 2022 09:02

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