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Forschungsbericht 2017-01 AK Flock PDF

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Forschungsbericht 2017-01 1 0 Design and Performance Analysis of - 7 1 Three-Dimensional Air Intakes for Su- 0 2 personic Combustion Ramjet Engines - - B F - R L D Andreas K. Flock N R S I Deutsches Zentrum für Luft- und Raumfahrt Institut für Aerodynamik und Strömungstechnik Abteilung Über- und Hyperschalltechnologien Köln k c o ISSN 1434-8454 Fl . K ISRN DLR-FB--2017-01 A. D93 Simultaneously published as doctoral thesis at the Faculty of Aerospace Engineering and Geodesy of the University of Stuttgart. Erscheint gleichzeitig als Dissertation an der Fakultät für Luft- und Raumfahrttechnik und Geodäsie der Universität Stuttgart. Herausgeber Deutsches Zentrum für Luft- und Raumfahrt e. V. Bibliotheks- und Informationswesen D-51170 Köln Porz-Wahnheide Linder Höhe D-51147 Köln Telefon (0 22 03) 6 01 - 44 44 Telefax (0 22 03) 6 01 - 47 47 Als Manuskript gedruckt. Abdruck oder sonstige Verwendung nur nach Absprache mit dem DLR gestattet. ISSN 1434-8454 Hypersonics, Air-Breathing Propulsion, Scramjet, Analytical Intake Design, Supersonic Diffusor, Intake Starting Andreas K. FLOCK Institute of Aerodynamics and Flow Technology within DLR, Supersonic and Hypersonic Technologies Department, Köln, Germany Design and Performance Analysis of Three-Dimensional Air Intakes for Supersonic Combustion Ramjet Engines Doctoral Thesis University of Stuttgart DLR-Forschungsbericht 2017-1, 2017, 153 pages, 105 figures, 14 tables, 119 references, 33.00 € plus taxes The Supersonic Combustion Ramjet (SCRamjet) engine is an efficient propulsion device for supersonic and hypersonic velocities. The present work focuses on the SCRamjet air intake which serves as the engine’s compressor. First, an analytical intake design tool was developed to generate so called streamline traced intake geometries. Second, the starting behavior of hypersonic air intakes was investigated experimentally in a blow down wind tunnel with a three-dimensional intake model with planar surfaces. A semi-empirical estimate was developed to predict intake starting of three-dimensional intake geometries. Third, the three-dimensional intake was further investigated experimentally and results were compared to numerical simulations. Finally, the performance of the three-dimensional intake was compared to the performance of different streamline traced intakes, designed with the analytical tool. Overall, the specific impulse of the streamline traced intakes was approximately 10 % higher compared to the three-dimensional intake configuration. Hyperschall, Luftatmender Antrieb, Scramjet, Analytische Einlaufauslegung, Überschall- diffusor, Einlauf-Startverhalten (Published in English) Andreas K. FLOCK Institut für Aerodynamik und Strömungstechnik des DLR, Abteilung Über- und Hyperschalltechnologien, Köln Auslegung und Leistungscharakterisierung von dreidimensionalen Lufteinläufen für SCRamjet Antriebe Dissertation Universität Stuttgart DLR-Forschungsbericht 2017-1, 2017, 153 Seiten, 105 Bilder, 14 Tabellen, 119 Literatur- stellen, 33,00 € zzgl. MwSt. Der Supersonic Combustion Ramjet (SCRamjet)-Motor ist ein effizienter Antrieb für den Über- und Hyperschallflug. Die vorliegende Arbeit konzentriert sich auf den Lufteinlauf, welcher als Kompressor dient. Zuerst wurde ein analytisches Einlaufauslegeverfahren entwickelt, um so genannte „Streamline-Traced“ Geometrien zu generieren. Als nächstes wurde das Startverhalten von Hyperschalleinläufen anhand eines dreidimensionalen Rampen-Einlaufmodells experimentell in einem Windkanal untersucht. Eine halb-empirische Abschätzung wurde entwickelt um das Startverhalten von dreidimensionalen Einlaufgeometrien vorherzusagen. Weiterhin wurde der Rampen-Einlauf experimentell näher untersucht und Ergebnisse wurden mit numerischen Simulationen verglichen. Zuletzt wurden die Leistungsparameter des Rampen-Einlaufs mit denen von „Streamline-Traced“ Einläufen verglichen. Insgesamt war der spezifische Impuls der „Streamline-Traced“ Einläufe etwa 10% höher verglichen mit den Rampeneinläufen. Forschungsbericht 2017-01 Design and Performance Analysis of Three-Dimensional Air Intakes for Su- personic Combustion Ramjet Engines Andreas K. Flock Deutsches Zentrum für Luft- und Raumfahrt Institut für Aerodynamik und Strömungstechnik Abteilung Über- und Hyperschalltechnologien Köln 153 Seiten 105 Bilder 14 Tabellen 119 Literaturstellen Design and Performance Analysis of Three-Dimensional Air Intakes for Supersonic Combustion Ramjet Engines AthesisacceptedbytheFacultyofAerospaceEngineeringandGeodesyoftheUniversityof StuttgartinpartialfulfillmentoftherequirementsforthedegreeofDoctorofEngineering Sciences(Dr.-Ing.) by AndreasK.Flock borninSchweinfurt,Germany MainReferee: Prof. Dr.-Ing. EwaldKrämer Co-Referee: Prof. Dr.-Ing. HerbertOlivier(RWTHAachen,Germany) DateofDefense: 18. November2016 InstituteofAerodynamicsandGasDynamics UniversityofStuttgart 2017 Preface I conducted the present work within the Supersonic and Hypersonic Technology Department of the In- stitute of Aerodynamics and Flow Technology at the German Aerospace Center (DLR) Köln. For the opportunity to conduct this work, the outstanding working conditions, and the scientific advice I sin- cerely thank Dr. Ali Gülhan. Furthermore, I thank Prof. Dr. Ewald Krämer for being my main referee, and Prof. Dr. Herbert Olivier for being my co-referee. I am convinced that the expertise of both was essentialduringthepreparationofthismanuscript. Next, I would like to thank the entire Supersonic and Hypersonic Technology Department for the great working atmosphere and inspiring discussions held during various opportunities. In particular I would liketothankMarcoSchmorsandMichaelKosbowforthetechnicalsupportandadviceduringthewind tunnel experiments; Dr. Burkard Esser for advice on computer related issues and high temperature effects;SergejBlem,Dr. PatrickGruhn,Dr. DirkHerrmann,andDr. OliverHohnfordiscussionsonair breathing propulsion. Finally, I would like to thank Matthias Koslowski, Dominik Neeb, Dr. Johannes Riehmer,andDominikSaileforthevividdiscussions,greatadvices,andfruitfulcommentsmadeinthe contextofthisworkandbeyond. I also would like to thank the German Research Foundation (DFG) for the funding of the project. As English is not my first language I depended on various editors, which all added to the quality of the manuscript. InthiscontextIwouldliketothank: NicolasDeLouise,SamDuckitt,Dr. AbhinavKrishna, Dr. SiddarthKrishnamoorthy,AngelaPavuk,AmitRoghelia,JessicaThompson,andKyleZienin. Finally, and most importantly, I would like to thank my family and friends, for the granted motivation during the past few years. In particular I would like to thank my parents, who not only supported me duringmytimeatDLRbutduringmyentirelife. Last,IwouldliketothankAntoniaforbeinggreat! Köln,November2016 AndreasFlock 3

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Der Supersonic Combustion Ramjet (SCRamjet)-Motor ist ein effizienter Antrieb für den . 3.1 Fundamentals . configurations were all within the critical region of the Kantrowitz diagram, where . other defense contractors in the X51A and the HIFiRE programs (section 1.2.3) support this argument,.
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