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 - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Kremer, Robert A1 - Khani, Somayeh A1 - Appel, Tamara A1 - Palkowski, Heinz A1 - Foadian, Farzad T1 - Selective laser melting of CuSn10: simulation of mechanical properties, microstructure, and residual stresses JF - Materials Y1 - 2022 SN - 1996-1944 SS - 1996-1944 VL - 15 (2022) IS - 11 SP - 1 EP - 13 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Guias, Flavius T1 - On efficacy and effectiveness of vaccines BT - a mathematical approach based on conditional probability with applications to the COVID-19 context JF - Spora : a journal of biomathematics Y1 - 2022 SN - 2473-5493 SS - 2473-5493 VL - 8 (2022) SP - 56 EP - 60 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Guias, Flavius T1 - Effects of the reproduction number in a SEIIRD model describing the time evolution of COVID-19 at country level JF - WSEAS Transactions on Computer Research Y1 - 2020 SN - 1991-8755 SS - 1991-8755 VL - 19 (2020) SP - 292 EP - 297 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Guias, Flavius T1 - Numerical simulation of a modified SIR model fitting statistical data for COVID-19 JF - WSEAS Transactions on Computer Research Y1 - 2020 SN - 1991-8755 SS - 1991-8755 VL - 8 (2020) SP - 115 EP - 125 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Bongert, Markus A1 - Wüst, Jan A1 - Strauch, Justus A1 - Buchwald, Dirk T1 - Proof of concept for ozone-based disinfection of heater cooler units JF - Current directions in biomedical engineering Y1 - 2020 SN - 2364-5504 SS - 2364-5504 VL - 6 (2020) IS - 3 ER - TY - CHAP U1 - Buchbeitrag A1 - Schemmann, Christoph A1 - Geller, Marius A1 - Kluck, Norbert T1 - Identification of loss model parameters for highly loaded centrifugal impellers T2 - Proceedings : 15th International Probabilistic Workshop & 10th Dresdner Probabilistic Workshop, 27th-29th September 2017, Dresden, Germany Y1 - 2017 PB - TUDpress CY - Dresden ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Guias, Flavius T1 - Numerical solvers for large systems of ordinary differential equations based on the stochastic direct simulation method improved by the Picard and Runge-Kutta principles JF - International Journal of Mathematics and Computers in Simulation Y1 - 2017 SN - 1998-0159 SS - 1998-0159 VL - 11 (2017) SP - 93 EP - 99 ER - TY - CHAP U1 - Buchbeitrag A1 - Guias, Flavius T1 - Stochastic Picard-Runge-Kutta solvers for large systems of autonomous ordinary differential equations T2 - 2017 fourth International Conference on Mathematics and Computers in Science and Industry - MCSI 2017 : Corfu, Greece, 24-27 August 2017 : proceedings Y1 - 2017 SP - 289 EP - 302 PB - IEEE CY - Piscataway, NJ ER - TY - CHAP U1 - Buchbeitrag A1 - Gössner, Stefan T1 - Fundamentals for web-based analysis and simulation of planar mechanisms T2 - EuCoMeS 2018 : Proceedings of the 7th European Conference on Mechanism Science Y1 - 2018 SP - 215 EP - 222 PB - Springer International Publishing CY - Cham ER - TY - CHAP U1 - Buchbeitrag A1 - Geller, Marius A1 - Schemmann, Christoph A1 - Kluck, Norbert T1 - Optimization of the operation characteristic of a highly stressed centrifugal compressor impeller using automated optimization and metamodeling methods T2 - Proceedings of the ASME ... ; Volume 2, C ; Noise and innovative noise reduction; radial turbomachinery aerodynamics; multidisciplinary design approaches, optimization and uncertainty quantification Y1 - 2017 PB - The American Society of Mechanical Engineers CY - New York ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Gehron, Johannes A1 - Zirbes, Julian A1 - Bongert, Markus A1 - Schäfer, Stefan A1 - Fiebich, Martin A1 - Krombach, Gabriele A1 - Böning, Andreas A1 - Grieshaber, Philippe T1 - Development and validation of a life-sized mock circulatory loop of the human circulation for fluid-mechanical studies JF - ASAIO Journal Y1 - 2018 SN - 1058-2916 SS - 1058-2916 VL - 2018 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Bongert, Markus A1 - Geller, Marius A1 - Pennekamp, Werner A1 - Volkmar, Nicolas T1 - Simulation of personalised haemodynamics by various mounting positions of a prosthetic valve using computational fluid dynamics JF - Biomedical engineering/Biomedizinische Technik Y1 - 2019 SN - 1862-278X SS - 1862-278X VL - 64 (2019) IS - 2 SP - 147 EP - 156 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Bongert, Markus A1 - Gehron, Johannes A1 - Geller, Marius A1 - Böning, A. A1 - Grieshaber, Philippe T1 - Bernoulli effect aggravates leg malperfusion during extracorporeal life support with femoral arterial cannulation BT - An in silico simulation study JF - The Thoracic and Cardiovascular Surgeon Y1 - 2018 SN - 0040-6384 SS - 0040-6384 VL - 2018 IS - S01 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Guias, Flavius A1 - Eremeev, Pavel T1 - Improving the stochastic direct simulation method with applications to evolution partial differential equations JF - Applied mathematics and computation Y1 - 2016 SN - 0096-3003 SS - 0096-3003 IS - 289 SP - 18 S1 - 18 ER - TY - CHAP U1 - Buchbeitrag A1 - Geller, Marius A1 - Schemmann, Christoph A1 - Kluck, Norbert T1 - Simulation of radial tilting pad journal bearings in consideration of fluid-structure-interaction and a cavitating multiphase flow T2 - NAFEMS European conference multiphysics simulation 2012 : 16-17 October 2012, Frankfurt, Germany Y1 - 2012 SP - 6 S1 - 6 PB - NAFEMS GmbH CY - Bernau am Chiemsee ER - TY - CHAP U1 - Buchbeitrag A1 - Bongert, Markus A1 - Geller, Marius A1 - Pennekamp, Werner T1 - Numerical simulation of hemodynamic in the patient-specific aorta after aortic valve replacement based on MRI-data T2 - Horizons in world cardiovascular research : Volume 1 Y1 - 2010 N1 - Reihe: Horizons in world cardiovascular research series PB - Nova Biomedical Books CY - New York ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Geller, Marius A1 - Schemmann, Christoph A1 - Kluck, Norbert T1 - Robustness evaluation and RDO of a centrifugal compressor impeller BT - efficiency enhancement concerning flow and mechanical properties in turbo machinery by performing sensitivity analysis and Robust Design Optimization with optiSLang and ANSYS JF - RDO-Journal Y1 - 2012 IS - 1 SP - 2 S1 - 2 ER - TY - JOUR U1 - Zeitschriftenartikel, wissenschaftlich - begutachtet (reviewed) A1 - Steland, A. A1 - Weidauer, Sabine T1 - Detection of stationary errors in multiple regressions with integrated regressors and cointegration JF - Sequential analysis Y1 - 2013 SN - 0747-4946 SS - 0747-4946 VL - 32 (2013) IS - 3 SP - 31 S1 - 31 ER -