TY - CHAP A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Berührungslose Temperaturmessung an Verbrennungsgasen bei hohen Temperaturen und hohen Drücken T2 - 20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019 N2 - Stationäre Gasturbinen sind von großer Bedeutung für die heutige Energieversorgung. Der Wirkungsgrad einer Gasturbine steigt mit zunehmender Heißgastemperatur an. Turbinenhersteller bzw. Kraftwerksbetreiber sind daher bestrebt, Turbinen bei der höchsten materialtechnisch möglichen Heißgastemperatur einzusetzen. Eine entsprechende Prozessoptimierung des Turbinenbetriebs setzt somit die exakte Kenntnis der Gastemperaturen während des Betriebs und damit eine verlässliche Messung derselben voraus. Zur Messung der Gastemperatur werden derzeit in der Regel Thermoelemente unmittelbar im Abgasstrom platziert. Aufgrund der dort vorherrschenden extremen Bedingungen degradieren diese Sensoren allerdings sehr schnell. Ein alternativer Ansatz sieht die Entwicklung eines berührungslosen Messverfahrens auf der Grundlage von Strahlungsthermometern vor. Für die Umsetzung dieses Vorhabens ist die genaue Kenntnis des Verhaltens der infrarot-optischen Emissions- und Transmissionsspektren der im Abgasstrom enthaltenen Gase bei hohen Temperaturen und Drücken eine wesentliche Voraussetzung. Aus diesem Grund wurde am ZAE Bayern eine Hochtemperatur-Hochdruck-Gaszelle entwickelt, die es in Verbindung mit einem FTIR-Spektrometer erlaubt, Gase und Gasgemische hinsichtlich dieser Gesichtspunkte zu charakterisieren. In dieser Arbeit wird die neue Messapparatur vorgestellt und Gasgemische, die für die Turbinenanwendungen relevant sind, werden analysiert. Zur Identifizierung eines geeigneten Wellenlängenbereichs für die geplante berührungslose Temperaturmessung wurden erste Messungen durchgeführt, auf deren Grundlage ein adäquater Wellenlängenbereich ermittelt werden konnte. Y1 - 2019 UR - 10.5162/sensoren2019/2.4.2 SN - 978-3-9819376-0-2 SP - 183 EP - 190 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Knopp, Kevin A1 - Zänglein, Marc A1 - Schreiber, Ekkehard A1 - Schmidt, Franz A1 - Brunner, Martin A1 - Müller, Michael T1 - Experimental set-up for dynamic material investigation at high temperatures T2 - Sensors and Measuring Systems; 19th ITG/GMA-Symposium N2 - Energy efficiency and operation safety in energy conversion, process technology, and aerospace engineering requires advanced material investigation, in particular at high temperatures to characterize the materials and components. Additionally, modern additive manufacturing methods, in particular the 3D metal laser printer requires a detailed control of the melting temperature. Many applications are based on a layered structures, e.g. thermal barrier coatings in gas turbines. Also components manufactured by additive manufacturing pose a layered structure. In these structures the mechanical contact between the layers and to the substrate is of high interest. Besides, the complete characterisation of the additive manufactured component is important for its later application. To cope with these new demands, the University of Applied Sciences Wuerzburg - Schweinfurt (FHWS) and the Bavarian Center for Applied … Y1 - 2018 UR - https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8436229 SN - 978-3-8007-4683-5 SP - 516 EP - 519 PB - VDE Verlag ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Entwicklung und Test eines langwelligen Strahlungsthermometers zur berührungslosen Temperaturmessung in Gasturbinen während des Betriebs JF - tm - Technisches Messen N2 - The aim of this work was the development of a long wavelength infrared radiation thermometer for the non-contact measurement of surface temperatures in stationary gas turbines during operation within the EU-project „Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines (acronym STARGATE)“. In this work, the infrared-optical properties of the thermal barrier coatings and the combustion gases were determined at ZAE Bayern at high temperatures up to 1600 K and pressures up to 13 bar. Based on these experimental characterizations, a suitable spectral range could be identified which lies around 10 μm for the long-wavelength infrared radiation thermometer. According to these findings, a laboratory setup with suitable optical components (filters, IR-fibers, etc.) was firstly realized and verified. Subsequently, a prototype for measurements in gas turbines during operation of the turbines has … N2 - Das Ziel dieser Arbeit bestand in der Entwicklung eines langwelligen Strahlungsthermometers zur berührungslosen Messung von Oberflächentemperaturen in stationären Gasturbinen während des Betriebs der Turbinen innerhalb des EU-geförderten Projektes „Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines (Acronym STARGATE)“. Im Rahmen der Arbeit wurden die infrarot-optischen Eigenschaften der Wärmedämmschichten und der vorhandenen Brenngase am ZAE Bayern bei hohen Temperaturen bis 1600 K und Drücken bis 13 bar bestimmt. Mit Hilfe dieser experimentellen Charakterisierungen konnte ein geeigneter Spektralbereich um 10 μm für das langwellige Strahlungsthermometer identifiziert werden. Entsprechend dieser Erkenntnisse wurde zunächst ein Laboraufbau mit geeigneten optischen Bauteilen (Filter, IR-Wellenleiter, etc.) realisiert und verifiziert. Anschließend wurde ein Prototyp für Messungen in Gasturbinen während des Betriebs der Turbinen entwickelt und in einem Turbinenteststand der Firma Siemens AG in Berlin erfolgreich getestet. Abschließend wurde eine Unsicherheitsanalyse durchgeführt, die eine erweiterte Messunsicherheit der gemessenen Temperaturen von etwa ± 30 K ergab. T2 - Development and test of a long wavelength infrared radiation thermometer for non-contact temperature measurements in gas turbines during operation KW - Berührungslose Temperaturmessung KW - Strahlungsthermometrie KW - Wärmedämmschicht KW - Gasturbine KW - Emissionsgrad KW - Infrarot-Strahlung KW - Non-contact temperature measurement KW - radiation thermometry KW - thermal barrier coating KW - gas turbine KW - emissivity KW - infrared radiation Y1 - 2017 U6 - https://doi.org/https://doi.org/10.1515/teme-2017-0077 VL - 85 IS - 1 SP - 28 EP - 39 PB - Oldenbourg Wissenschaftsverlag CY - Berlin/Boston ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Infrared-optical characterization of emitting and absorbing gases at high temperatures and high pressures JF - High Temperatures – High Pressures N2 - In the context of the optimization of stationary gas turbines, the surface temperatures of the turbine blades have to be measured by a non-contact technique using radiation thermometers during operation of the turbine. Nowadays turbine blades are protected by thermal barrier coatings. The infrared-optical properties of these coatings require the usage of the MIR or LWIR region for non-contact measurement of the surface temperatures. For performing such measurements and for properly analyzing the derived data, the transmission and absorption spectra of the combustion gas mixture within the turbine were determined at the local conditions during operation of the turbine. Therefore, subject of this work is the measurement of the transmission spectra of carbon dioxide and water vapor at high temperatures and high pressures to identify a wavelength range, which is almost free of absorption and emission effects. In … Y1 - 2018 VL - 47 IS - 1 SP - 3 EP - 21 ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark A1 - Hodge, D. T1 - Long wavelength infrared radiation thermometry for non-contact temperature measurements in gas turbines JF - Infrared Physics & Technology N2 - The objective of the EU project “Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines (acronym STARGATE)” is the development of a suite of advanced sensors, instrumentation and related systems in order to contribute to the developing of the next generation of green and efficient gas turbine engines. One work package of the project deals with the design and development of a long wavelength infrared (LWIR) radiation thermometer for the non-contact measurement of the surface temperature of thermal barrier coatings (TBCs) during the operation of gas turbine engines. For opaque surfaces (e.g. metals or superalloys) radiation thermometers which are sensitive in the near or short wavelength infrared are used as state-of-the-art method for non-contact temperature measurements. But this is not suitable for oxide ceramic based TBCs (e.g. partially yttria stabilized zirconia) as oxide ceramics … Y1 - 2017 UR - https://www.sciencedirect.com/science/article/pii/S1350449516303395 IS - 80 SP - 120 EP - 130 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Ochs, Dennis A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Schmidt, Franz A1 - Brunner, Martin T1 - Optische Sensorik für die additive Fertigung T2 - Sensoren und Messsysteme 2019 Y1 - 2019 CY - Nürnberg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Construction, Calibration and Application of a LWIR Pyrometer within the EU Project STARGATE BT - Tempmeko 2016 N2 - The EU project STARGATE (Sensors Towards Advanced Monitoring and Control of Gas Turbine Engines) has the headline objective to develop a suite of advanced sensors, instrumentation and related systems in order to contribute to the development of the next generation of green and efficient gas turbine engines. To increase the efficiency of gas turbines higher combustion temperatures and higher turbine inlet temperatures are required. This implies that turbine blades and vanes are exposed to higher temperatures. Advanced thermal barrier coatings (TBCs) based on ceramic materials protect the components from overheating and ensure mechanical integrity. Still, materials and coatings need to be stressed to their limits to reach the challenging goals of an efficiency increase. Under these circumstances, it is crucial to have sensing techniques available that are capable of accurately monitoring the temperature of turbine parts in order to prevent damages within the engine. The approach to overcome current limitations of existing techniques is to use long wavelength infrared (LWIR) pyrometry as TBCs are usually semi-transparent in the near or short wavelength infrared. Therefore one work package within the STARGATE project is dedicated to the development of a LWIR radiation thermometer to measure the surface temperature of TBCs contactless during operation of the gas turbine engines. The paper shortly gives an overview of the investigation performed within the STARGATE project. The construction, calibration and application of the LWIR radiation thermometer is described in detail and results obtained on a test facility are presented. The paper closes with an outlook on future plans of implementing the LWIR pyrometer in the quality system of gas turbine operation. Y1 - 2016 UR - https://www.researchgate.net/publication/341432336_CONSTRUCTION_CALIBRATION_AND_APPLICATION_OF_A_LWIR_PYROMETER_WITHIN_THE_EU_PROJECT_STARGATE CY - Zakopane (Polen) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Knopp, Kevin A1 - Zänglein, Marc T1 - Hochtemperaturmessung und Materialuntersuchung für Energietechnik und additive Fertigungsverfahren BT - Werkstoffwoche 2017 Y1 - 2017 CY - Dresden ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. T1 - Experimental set-up for dynamic material investigation BT - European Conference on Thermophysical Properties 2017 Y1 - 2017 CY - Graz (Österreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Knopp, Kevin A1 - Shandy, Amir T1 - Non-contact detection of the adhesive properties of ceramic coatings for high temperature applications using infrared thermography; Transactions BT - Transactions Y1 - 2022 PB - SMiRT-26 CY - Berlin/Potsdam ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Zipf, Matthias T1 - Non-contact temperature measurement of combustion gases at high temperatures and high pressures BT - European Conference on Thermophysical Properties 2017 Y1 - 2017 CY - Graz (Österreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Müller, Michael A1 - Ebert, Hans-Peter A1 - Möller, F. A1 - Krüger, U. A1 - Schmidt, Franz A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Zänglein, Marc T1 - Einsatz von Thermografiegeräten zur berührungslosen Detektion der Haftungseigenschaften an keramischen Wärmedämmschichten BT - Temperatur 2020 Y1 - 2020 CY - Berlin ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark A1 - Hodge, D. T1 - Development of Long Wavelength Infrared Radiation Thermometry for Measurements in Gas Turbines BT - Material Science and Engineering 2016 Y1 - 2016 CY - Darmstadt ER - TY - JOUR A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Identification of wavelength regions for non-contact temperature measurement of combustion gases at high temperatures and high pressures JF - High Temperatures – High Pressures N2 - Stationary gas turbines are still an important part of today's power supply. With increasing temperature of the hot combustion gas inside a gas turbine, the efficiency factor of the turbine increases. For this reason, it is intended to operate turbines at the highest possible gas temperature. Therefore, in the combustion chamber and especially at the position of the first stage guide vanes the gas temperature needs to be measured reliably. To determine the gas temperature, one promising approach is the application of a non-contact measurement method using a radiation thermometer. A radiation thermometer can measure the gas temperature remotely from outside of the harsh environment. At ZAE Bayern, a high temperature and high pressure gas cell has been developed for this purpose in order to investigate gases and gas mixtures under defined conditions at high pressures and high temperatures. This gas cell can … Y1 - 2020 VL - 49 IS - 3 SP - 241 EP - 260 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Müller, Michael A1 - Möller, F. A1 - Krüger, U. A1 - Schmidt, F. A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Zänglein, Marc A1 - Ochs, Dennis A1 - Shandy, Amir T1 - Non-contact detection of the adhesion properties of ceramic based thermal barrier coatings by determining the surface temperatures using thermography BT - ECTP 2020 Y1 - 2020 CY - Venedig (Italien) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Brunner, Martin T1 - Optische Sensorik für die additive Fertigung T2 - 4SMARTS 2019 Y1 - 2019 SN - 978-3-8440-6425-4 SP - 105 EP - 116 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - High temperature test-rig for emissvity and non-contact temperature measurements BT - European Conference on Thermophysical Properties 2017 Y1 - 2017 CY - Graz (Österreich) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Zipf, Matthias A1 - Manara, Jochen A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter T1 - Non-Contact Temperature Measurement Of Combustion Gases at High Temperatures and High Pressures BT - Tempmeko 2016 Y1 - 2016 CY - Zakopane (Polen) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla T1 - Ein Versuch zur berührungslosen nicht-invasiven Qualifizierung der Haftung von Wärmeschutzschichten BT - Temperatur 2017 Y1 - 2017 SN - 978-3-944659-04-6 SP - 71 EP - 76 ER - TY - CHAP A1 - Manara, Jochen A1 - Hartmann, Jürgen A1 - Rydzek, M. A1 - Stark, Thomas A1 - Arduini-Schuster, Mariacarla A1 - Ebert, Hans-Peter T1 - Bestimmung des Emissionsgrades und Transmissionsgrades keramischer Materialien bei hohen Temperaturen BT - Temperatur 2013 Y1 - 2013 SN - 3-9810021-8-0 SP - 219 EP - 224 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Lenhart-Rydzek, M. A1 - Stark, Thomas A1 - Arduini-Schuster, Mariacarla A1 - Manara, Jochen T1 - Enhanced measuring technique to determine the angle dependent surface emittance from 200 °C up to 1600 °C BT - Tempmeko 2013 Y1 - 2013 CY - Funchal (Portugal) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Long Wavelength Infrared Radiation Thermometry for Non-Contact Temperature Measurements in Gas Turbines BT - GTI Gas Turbine Instrumentation Conference Y1 - 2015 CY - London ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Entwicklung und Test eines langwelligen Strahlungsthermometers zur berührungslosen Temperaturmessung in Gasturbinen während des Betriebs BT - Temperatur 2017 Y1 - 2017 SN - 978-3-944659-04-6 SP - 43 EP - 48 CY - Berlin ER - TY - GEN A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Brunner, Martin A1 - Müller, Michael T1 - Messsystem für dynamische Materialuntersuchung bei hohen Temperaturen BT - Sensoren und Messsysteme 2018 (Poster) Y1 - 2018 CY - Nürnberg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Ochs, Dennis A1 - Zänglein, Marc A1 - Schreiber, Ekkehard A1 - Schmidt, Franz T1 - Experimental set-up for dynamic material investigation at high-temperatures for power engineering and additive manufacturing BT - 44. Freiburger Infrarot Kolloquium Y1 - 2019 CY - Freiburg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Ochs, Dennis A1 - Zänglein, Marc A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Hemberger, Frank A1 - Vidi, Stephan A1 - Manara, Jochen A1 - Müller, Michael A1 - Möller, F. T1 - Systematische thermophysikalische Charakterisierung von Wärmedämmschichten BT - Sensoren und Messsysteme 2019 Y1 - 2019 CY - Nürnberg ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Schmidt, Franz A1 - Brunner, Martin T1 - Optical Sensor systems for additive manufacturing BT - Tempmeko 2019 Y1 - 2019 CY - Chengdu (China) ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Mathias A1 - Stark, Thomas A1 - Knopp, Kevin A1 - Zänglein, Marc A1 - Lenski, Philipp A1 - Schreiber, Ekkehard A1 - Schmidt, Franz A1 - Brunner, Martin A1 - Müller, Michael T1 - Thermophysical property measurements at high-temperatures for power engineering and additive manufacturing processes BT - QIRT 2018, 25 - 29 June 2018, Berlin, Germany N2 - To address the needs for increasing efficiency in power conversion, stratified structures like thermal barrier coatings, are used to increase operation temperature. Also advanced material processing like 3D laser printing of metals and ceramics are based on a layer-to-layer process at high temperatures, resulting in non-homogeneous components. Both systems require more and more detailed investigation methods to characterise the material properties of the resulting structures and to optimize the relevant processes. To address the required needs in advanced material characterisation recently an attempt was started to develop a unique measurement set-up for advanced material characterisation. This method is based on the well know laser flash principle, which was improved by adding supplementary heating sources and additional detection channels. Combining different heating mechanism and heating times with the two-dimensional measuring of the thermal flow across the sample enables the determination of different opto-thermal parameters and other material properties, e.g. mechanical contact, electrical conductivity or optical data, which also depend on or affect the flow of heat. In this paper we describe the implementation of the different optical methods to measure the thermal heat flow by point-like and two-dimensional temperature measurement and present first results on several samples. KW - thermophysical property measurement KW - additive manufacturing process Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:863-opus-17678 SN - 978-3-940283-94-8 CY - Berlin ER - TY - JOUR A1 - Jürgen, Hartmann A1 - Arduini, Mariacarla A1 - Manara, Jochen A1 - Stark, Thomas A1 - Ebert, Hans-Peter T1 - Development and Evaluation of an Improved Apparatus for Measuring the Emissivity at High Temperatures JF - Sensors N2 - An improved apparatus for measuring the spectral directional emissivity in the wavelength range between 1 µm and 20 µm at temperatures up to 2400 K is presented in this paper. As a heating unit an inductor is used to warm up the specimen, as well as the blackbody reference to the specified temperatures. The heating unit is placed in a double-walled vacuum vessel. A defined temperature, as well as a homogenous temperature distribution of the whole surrounding is ensured by a heat transfer fluid flowing through the gap of the double-walled vessel. Additionally, the surrounding is coated with a high-emitting paint and serves as blackbody-like surrounding to ensure defined boundary conditions. For measuring the spectral directional emissivity at different emission angles, a movable mirror is installed in front of the specimen, which can be adjusted by a rotatable arrangement guiding the emitted radiation into the attached FTIR-spectrometer. The setup of the emissivity measurement apparatus (EMMA) and the measurement procedure are introduced, and the derived measurement results are presented. For evaluating the apparatus, measurements were performed on different materials. The determined emissivities agree well with values published in literature within the derived relative uncertainties below 4% for most wavelengths. KW - emissivity KW - reflectivity KW - infrared radiation KW - high temperature KW - Temperatur KW - Emissivität Y1 - 2021 UR - https://www.mdpi.com/1424-8220/21/18/6252 U6 - https://doi.org/10.3390/s21186252 SN - 1424-8220 VL - 21 IS - 18 ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark A1 - Hodge, D. T1 - Development of Long Wavelength Infrared Radiation Thermometry for Measurements in Gas Turbines BT - Key Note Lecture MSE 2016 Y1 - 2016 CY - Darmstadt ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Knopp, Kevin A1 - Lenski, Philipp A1 - Zänglein, Marc A1 - Manara, Jochen A1 - Stark, Thomas A1 - Zipf, Matthias A1 - Arduini, Mariacarla A1 - Schreiber, Ekkehard A1 - Krüger, U. A1 - Schmidt, Franz A1 - Brunner, Martin T1 - Sensor systems for additive manufacturing Y1 - 2018 PB - Key Note Lecture MSE 2018 CY - Darmstadt ER - TY - CHAP A1 - Hartmann, Jürgen A1 - Manara, Jochen A1 - Zipf, Matthias A1 - Stark, Thomas A1 - Arduini, Mariacarla A1 - Ebert, Hans-Peter A1 - Tutschke, Andreas A1 - Hallam, Andrew A1 - Hanspal, Jagdevinder A1 - Langley, Mark T1 - Development and validation of a long wavelength infrared (LWIR) radiation thermometer for contactless temperature measurements in gas turbines during operation T2 - EVI-GTI and PIWG Joint Conference on Gas Turbine Instrumentation N2 - A collection of slides from the author's conference presentation is given. The presentation introduces the infrared-optical characterization of thermal barrier coatings and the development of LWIR pyrometer for measuring temperature in an operating gas turbine. The test facility for evaluating the LWIR pyrometer is also presented. This presentation includes the experimental setup for LWIR calibration and measurement. Y1 - 2016 UR - https://ieeexplore.ieee.org/abstract/document/7827904 SP - 1 EP - 26 PB - IET ER -