@article{GuesewellHimmelbergRothetal., author = {G{\"u}sewell, Manfred and Himmelberg, Axel and Roth, Norbert and Siepmann, Stefan}, title = {Untersuchungen zu Quenchprozessen}, language = {de} } @article{HimmelbergGuesewell, author = {Himmelberg, Axel and G{\"u}sewell, Manfred}, title = {Simulation von Zweiphasenstr{\"o}mungen in Gasquenchern}, language = {de} } @article{RothGuesewellHimmelberg, author = {Roth, Norbert and G{\"u}sewell, Manfred and Himmelberg, Axel}, title = {Gestaltung und Betrieb einer Technikumsquenchanlage}, language = {de} } @article{RothGuesewellHimmelberg, author = {Roth, Norbert and G{\"u}sewell, Manfred and Himmelberg, Axel}, title = {Messung von Tropfenmerkmalen in einer Quenchapparatur}, language = {de} } @inproceedings{BergAntoshkivHimmelbergetal., author = {Berg, Heinz Peter and Antoshkiv, Oleksiy and Himmelberg, Axel and Izweik, Husni Taher and Poojitganont, Thanapol}, title = {Brennverfahrensentwicklung f{\"u}r eine neuartige Kreiskolbenmotorenfamilie, Wankelmotorenentwicklung}, language = {de} } @incollection{AntoshkivBergHimmelberg, author = {Antoshkiv, Oleksiy and Berg, Heinz Peter and Himmelberg, Axel}, title = {Optimierung der Z{\"u}ndkerzenposition in einem Wankelmotor, Motorische Verbrennung}, language = {de} } @inproceedings{PoojitganontBergIzweiketal., author = {Poojitganont, Thanapol and Berg, Heinz Peter and Izweik, Husni Taher and Himmelberg, Axel}, title = {Wankel Rotary Engine for Small Aircrafts and UAVs Applications: The Simulation for Chamber Design Development}, language = {en} } @inproceedings{BergHimmelbergMalenkyetal., author = {Berg, Peter and Himmelberg, Axel and Malenky, Uwe and Meincke, Marie and Soontornpasatch, Tosaporns}, title = {Hybrides Turbo Compound Fan Triebwerk}, series = {Deutscher Luft- und Raumfahrtkongress 2016, Braunschweig}, booktitle = {Deutscher Luft- und Raumfahrtkongress 2016, Braunschweig}, publisher = {Deutsche Gesellschaft f{\"u}r Luft- und Raumfahrt - Lilienthal-Oberth e.V}, address = {Bonn}, url = {http://nbn-resolving.de/urn:nbn:de:101:1-201610075510}, abstract = {Der Weg zum elektrischen Fliegen ist abh{\"a}ngig von der Entwicklung hochleistungsf{\"a}higer, kompakter und vor allem leichter Energiespeicher. Als mittelfristige, umweltschonende {\"U}bergangl{\"o}sung bieten sich, insbesondere f{\"u}r Flugtriebwerke mittlerer Leistungsklassen, Hybridsysteme aus Turbo-Compound-Kreiskolbenmotoren und Elektromaschinen f{\"u}r die Start- und Steigphasen an. Vorgestellt werden auf dem HSD-Konzept (HSD=Hybrid Super-Drive, vgl. [1]) beruhende luftfahrtechnische Anwendungen f{\"u}r unterschiedliche parallelhybride Flugantriebe. Die Basistechnologie st{\"u}tzt sich auf eine in der Produktion befindliche, vielstofff{\"a}hige Wankeltriebwerksfamilie. Das HSD-Konzept legt hierbei ein Kammervolumen von 650ccm zu Grunde. Der Leistungsbereich (0,8 bis 1,36MW) wird mit einem innovativen elektrischen parallel-hybriden Turbo-Compound-Konzept abgedeckt. Hierbei kommt zur Aufladung der Kreiskolben-Verbrennungsmaschine eine neuartige luftgelagerte Turbomaschine mit integrierter E-Maschine zum Einsatz. Als Vortriebstechnologie tr{\"a}gt das Counter-Rotating-Fan (CRF)-Konzept, welches am Beispiel eines Flugzeugtechnologietr{\"a}gers (Light-Jet) dargestellt wird, zur weiteren Steigerung der Wirtschaftlichkeit des Gesamtsystems bei. Der vorliegende Artikel basiert auf den in [1] beschrieben Grundlagen und stellt eine weiterf{\"u}hrende Diskussion im Rahmen des DLRK dar.}, language = {de} } @misc{BergHimmelbergLehmannetal., author = {Berg, Heinz Peter and Himmelberg, Axel and Lehmann, Mario and D{\"u}ckershoff, Roland and Neumann, Mathias}, title = {The Turbo-Fuel-Cell 1.0 - family concept - Compact Micro Gas Turbine (MGT) - Solid Oxide Fuel Cell (SOFC) energy converters in the 100 - 500 kW electrical power range for the future}, series = {IOP conference series : Materials Science and Engineering}, volume = {297}, journal = {IOP conference series : Materials Science and Engineering}, issn = {1757-899X}, doi = {doi:10.1088/1757-899X/297/1/012004}, pages = {15}, abstract = {The "Turbo-Fuel-Cell-Technology" has been described as a MGT-SOFC hybrid system consisting of a recuperated micro gas turbine (MGT) process with an embedded solid oxide fuel cell (SOFC) subsystem. SOFC stacks are connected to "SOFC stack grapes" and are equipped with the so called HEXAR-Module. This module is composed of a high-temperature heat exchanger (HEX), an afterburner (A) and a steam reformer (R). The MGT-concept is based on a generator driven directly by the turbomachine and a recuperator, which returns the exhaust heat to the pressurized compressor outlet air. This provides the necessary base for a highly effective, pure MGT process and the "MGT-SOFC-high-efficiency process". This paper describes the concept and the thermodynamic background of a highly effective and compact design of the "Turbo-Fuel-Cell 1.0-Family" in the electrical performance class from 100 to 500kW. The technological state of the system is shown and a rating of the system with comparative parameters is discussed. It becomes visible that all necessary basic technologies should be available and that the technology (for stationary applications) can have the "entry into services (E.I.S.)" in the next 10 years. The MGT-SOFC performance map under different operation conditions is discussed. This article also provides an overview of the research on MGT-SOFC-Systems and the scenario of an energy supply network and a mobile energy conversion of the future introduction.}, language = {en} } @misc{BergKleisslHimmelbergetal., author = {Berg, Heinz Peter and Kleissl, Marko and Himmelberg, Axel and Lehmann, Mario and Prechavut, Nontavut and Vorpahl, Michael}, title = {Heat balancing of direct reforming fuel cells in MGT-SOFC hybrid systems}, series = {9th Thai Society of Mechanical Engineers, International Conference on Mechanical Engineering (TSME-ICoME 2018) 11-14 December 2018, Phuket, Thailand}, journal = {9th Thai Society of Mechanical Engineers, International Conference on Mechanical Engineering (TSME-ICoME 2018) 11-14 December 2018, Phuket, Thailand}, editor = {Prukvilailert, Monchai}, edition = {1. Auflage}, publisher = {IOP Publishing/IOP Science}, address = {Bristol}, issn = {1757-899X}, doi = {10.1088/1757-899X/501/1/012007}, pages = {50 -- 60}, abstract = {Solid oxide fuel cells convert chemical energy in electrical energy and are highly suitable for the conversion of hydrocarbon based fuels and products from PowerToGas conversions. Embedded in a micro gas turbine-cycle instead of the combustion chamber the heat energy of the injected fuel, released in the SOFC-Stack, can additionally converted into work and by a turbine-generator into electricity. In a compact system, SOFC stacks are designed to realize a direct steam-reforming process inside. In such direct-reforming fuel cell systems the SOFC operating temperature due to the heat demand for reforming, can be reduced to a value in the range of the outlet temperature of the downstream flow (650°C). If the cycle uses a recuperating system, the operating conditions of the SOFC can be realized without additional high-temperature heat exchanger systems. The system with an uncooled turbine, described in [1], just can reach the operating temperature with an additional high-temperature heat exchange. The system described in this publication does not require an additional high-temperature heat exchanger, because the X-value, as the ratio between the exchanged heat quantity and the required amount of heat to complete the MGT-cycle [2] due to the referring process, is nearly zero and can be realized via the inner container wall (of the MLC). The cycle is completed (between the SOFC and the turbine entry) by the heat input of an afterburner. Here the unreacted fuel of the SOFC fuel-stream is used to provide the necessary heat energy for the downstream turbo-generator-system.}, language = {en} }