TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - nicht begutachtet (unreviewed) A1 - Lattner, Yannick A1 - Geller, Marius A1 - Kluck, Norbert T1 - Efficiency Approximation of Centrifugal Compressors in the Cordier Diagram N2 - We present a simulation data-based efficiency approximation for radial turbocompressors, which is implemented in the well-known Cordier diagram. A sophisticated CAE workflow is used to calculate the operational characteristics of 50 machine designs with 50 impeller geometry variations each. A Kriging-based surrogate model is trained to approximate the efficiency of any machine designs' best geometry design. The models are implemented into a machine design workflow. As a result, duty-specific Cordier lines are introduced. They are automatically generated for a set of machine design parameters. The efficiency of the designs along the duty-specific Cordier lines is approximated. Using optimization techniques, an optimal compressor design for the given duty on every specific Cordier line may be identified. This highly increases the amount of information available in the early design stages for radial turbocompressors. KW - CENTRIFUGAL COMPRESSOR, CORDIER DIAGRAM, CFD, METAMODELING, DESIGN OF EXPERIMENTS Y1 - 2023 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-33661 U6 - https://doi.org/10.26205/opus-3366 DO - https://doi.org/10.26205/opus-3366 SP - 12 S1 - 12 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Lattner, Yannick A1 - Geller, Marius T1 - Radial Turbocompressor Chord Length Approximation for the Reynold's Number Calculation N2 - We present an approximation model for the chord length of radial turbocompressors. The model enables the calculation of a compressor's chord Reynold's number during the machine design process. The chord Reynold's number is shown to be the most accurate representation of the fluid dynamic properties inside the radial turbocompressor's impeller. It — however — requires the computation of the chord length, which is only available after defining the final impeller geometry. The method presenting in this paper only employs the compressors principal dimensions to approximate the chord length. The chord is modelled using a Bézier spline and quarter ellipse. This enables the earlier use of the chord Reynold's number during the machine design process of radial turbocompressors. KW - Strömungsmaschine , Reynolds-Zahl KW - Radial turbocompressors KW - Reynold's number KW - Turbomachinery KW - Design methods Y1 - 2023 UN - https://nbn-resolving.org/urn:nbn:de:hbz:dm13-33351 U6 - https://doi.org/10.26205/opus-3335 DO - https://doi.org/10.26205/opus-3335 ER - TY - THES U1 - Dissertation / Habilitation A1 - Werk, Katharina T1 - Risk-taking behavior as a hidden factor for sustainable business models' performance of European banks Y2 - 2021 N1 - Kooperative Promotion im Zusammenhang mit dem Promotionskolleg der Fachhochschule Dortmund. Dissertation of the Heinrich Heine University Düsseldorf, Faculty of Business Administration and Economics to obtain the title of Doctor rerum politicarum (Dr. rer. pol.) SP - xxiv, 299 S1 - xxiv, 299 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Gräßer, Felix A1 - Tesch, Falko A1 - Schmitt, Jochen A1 - Abraham, Susanne A1 - Malberg, Hagen A1 - Zaunseder, Sebastian T1 - A pharmaceutical therapy recommender system enabling shared decision-making JF - User Modeling and User-Adapted Interaction Y1 - 2021 SN - 0924-1868 SS - 0924-1868 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Behar, Joachim A. A1 - Liu, Chengyu A1 - Kotzen, Kevin A1 - Tsutsui, Kenta A1 - Corino, Valentina D. A. A1 - Singh, Janmajay A1 - Pimentel, Marco A. F. A1 - Warrick, Philip A1 - Zaunseder, Sebastian A1 - Andreotti, Fernando T1 - Remote health diagnosis and monitoring in the time of COVID-19 JF - Physiological Measurement Y1 - 2020 SN - 1361-6579 SS - 1361-6579 VL - 41 (2020) IS - 10 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Graham, Sarah E. A1 - Clarke, Shoa L. A1 - Wu, Kuan-Han H. A1 - Kanoni, Stavroula A1 - Arendt, Marina T1 - The power of genetic diversity in genome-wide association studies of lipids JF - Nature Y1 - 2021 SN - 1476-4687 SS - 1476-4687 VL - 600 (2021) SP - 675 EP - 679 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Wichert, Katharina A1 - Rabstein, Sylvia A1 - Stang, Andreas A1 - Erbel, Raimund A1 - Eisele, Lewin A1 - Arendt, Marina A1 - Dragano, Nico A1 - Hoffmann, Wolfgang A1 - Lerch, Markus M. A1 - Roskoden, Frederick Charles A1 - Schmidt, Carsten Oliver A1 - Völzke, Henry A1 - Jöckel, Karl-Heinz A1 - Brüning, Thomas A1 - Behrens, Thomas T1 - Associations between shift work and risk of colorectal cancer in two German cohort studies JF - Chronobiology International : the journal of biological and medical rhythm research Y1 - 2020 SN - 1525-6073 SS - 1525-6073 VL - 37 (2020) IS - 8 SP - 1235 EP - 1243 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Kuhnt, Sonja A1 - Becker-Emden, Eva-Christina A1 - Schade, Tim A1 - Eden, Wolfgang A1 - Middendorf, Bernhard T1 - Use of optimal mixture-process designs and response-surface models to study properties of calcium silicate units JF - Quality and Reliability Engineering International Y1 - 2021 SN - 0748-8017 SS - 0748-8017 VL - 37 (2021) IS - 2 SP - 391 EP - 408 ER - TY - CHAP U1 - Buchbeitrag A1 - Tillmann, W. A1 - Baumann, I. A1 - Brinkhoff, A. A1 - Kuhnt, Sonja A1 - Becker-Emden, Eva-Christina A1 - Kalka, A. T1 - Effect of the spray parameters on the particle behavior and the coating properties during ID warm spraying of fine WC-12Co powders (-10 + 2 μm) T2 - Thermal Spray 2021 : proceedings from the international thermal spray conference Y1 - 2021 SP - 283 EP - 289 PB - ASM CY - Kinsman Road, OH ER - TY - BOOK U1 - Buch ED - Müller, Jens ED - Wiedemann, Julius T1 - The history of graphic design BT - 1890-today Y1 - 2022 SN - 978-3-8365-8806-5 SB - 978-3-8365-8806-5 SP - 511 S1 - 511 PB - Taschen CY - Köln ER -