Relevant bibliographies by topics / Rheinisch-Westfälische Technische Hochschule Aachen. Hochschularchiv der RWTH Aachen

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Rheinisch-Westfälische Technische Hochschule Aachen. Hochschularchiv der RWTH Aachen'

Author: Grafiati
Published: 29 July 2024
Last updated: 31 July 2024

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Journal articles on the topic "Rheinisch-Westfälische Technische Hochschule Aachen. Hochschularchiv der RWTH Aachen"

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Williams, R. Stanley. "Summary of the Faraday Discussion on New memory paradigms: memristive phenomena and neuromorphic applications." Faraday Discussions 213 (2019): 579–87. http://dx.doi.org/10.1039/c8fd90061b.

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The Faraday Discussion on New memory paradigms: memristive phenomena and neuromorphic systems was held from October 15–17 on the campus of the Rheinisch-Westfälische Technische Hochschule Aachen University, or RWTH Aachen University, under the auspices of the Royal Society of Chemistry.
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Borregan-Alvarado, Jon, Izaskun Alvarez-Meaza, Ernesto Cilleruelo-Carrasco, and Gaizka Garechana-Anacabe. "A Bibliometric Analysis in Industry 4.0 and Advanced Manufacturing: What about the Sustainable Supply Chain?" Sustainability 12, no. 19 (September 23, 2020): 7840. http://dx.doi.org/10.3390/su12197840.

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During the last decade, different concepts, methodologies, and technologies have appeared, evolving industry toward what we know today as the fourth industrial evolution or Industry 4.0 (I4.0) and Advanced Manufacturing (AM). Based on both, Supply Chain (SC) is presented as the relevant process that sets the sustainability of manufacturing and, therefore, is defined as a key term in a sustainable approach to I4.0. However, there are no studies that analyze the evolution of science in the fields of I4.0 and AM together. In order to fill this gap, the aim of this research work is to analyze the tendencies of science research related to I4.0 and AM by conducting a bibliometric and network analysis and also to generate a new contribution through the analysis of scientific trends related to SC and Sustainable Supply Chain (SSC) within this scientific context, for the time span 2010–2019. The results show that the number of publications is growing exponentially and the most active countries are Germany and the U.S., with Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University being the most productive organization and Tecnologico de Monterrey the most collaborative. The analysis of the scientific terms allows us to conclude that the research field is in a growth phase, generating up to almost 4500 new terms in 2019.
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Stamatopoulos, Panagiotis, Panagiotis Drosatos, Nikos Nikolopoulos, and Dimitrios Rakopoulos. "Determination of a Methodology to Derive Correlations Between Window Opening Mass Flow Rate and Wind Conditions Based on CFD Results." Energies 12, no. 9 (April 26, 2019): 1600. http://dx.doi.org/10.3390/en12091600.

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This paper presents a methodology for the development of an empirical equation which can provide the air mass flow rate imposed by single-sided wind-driven ventilation of a room, as a function of external wind speed and direction, using the results from Computational Fluid Dynamics (CFD) simulations. The proposed methodology is useful for a wide spectrum of applications, in which no access to experimental data or conduction of several CFD runs is possible, deriving a simple expression of natural ventilation rate, which can be further used for energy analysis of complicated building geometries in 0-D models or in object-oriented software codes. The developed computational model simulates a building, which belongs to Rheinisch-Westfälische Technische Hochschule (RWTH, Aachen University, Aachen, Germany) and its surrounding environment. A tilted window represents the opening that allows the ventilation of the adjacent room with fresh air. The derived data from the CFD simulations for the air mass flow were fitted with a Gaussian function in order to achieve the development of an empirical equation. The numerical simulations have been conducted using the Ansys Fluent v15.0® software package. In this work, the k-w Shear Stress Transport (SST) model was implemented for the simulation of turbulence, while the Boussinesq approximation was used for the simulation of the buoyancy forces. The coefficient of determination R2 of the curve is in the range of 0.84–0.95, depending on the wind speed. This function can provide the mass flow rate through the open window of the investigated building and subsequently the ventilation rate of the adjacent room in air speed range from 2.5 m/s to 16 m/s without the necessity of further numerical simulations.
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Joisten, Christine, Annelene Kossow, Julian Book, Lukas Broichhaus, Monika Daum, Nina Eisenburger, Alisa Fabrice, et al. "How to manage quarantine—adherence, psychosocial consequences, coping strategies and lifestyle of patients with COVID-19 and their confirmed contacts: study protocol of the CoCo-Fakt surveillance study, Cologne, Germany." BMJ Open 11, no. 4 (April 2021): e048001. http://dx.doi.org/10.1136/bmjopen-2020-048001.

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IntroductionThe current coronavirus (SARS-CoV-2) pandemic has placed unprecedented restrictions on people’s lives and routines. To counteract the exponential spread of this virus, a lockdown was implemented in Germany in March 2020. Infected persons and their contacts were also quarantined. Compliance with quarantine measures is essential for containing the spread of the virus and avoiding incalculable consequences in terms of morbidity and mortality. On the other hand, prolonged homestays, particularly quarantining, may lead to fear, panic, anxiety and depression. Hence, determining the psychological response in people during quarantine and their coping strategies is relevant for the counselling and support of affected persons by healthcare workers.Methods and analysisThe CoCo-Fakt-Survey (Cologne-Corona-Beratung und Unterstützung Für Index- und KontAKt-Personen während der Quarantäne-ZeiT; Cologne-Corona counselling and support for index and contacts during the quarantine period—author’s translation) will examine a cohort of persons in Cologne quarantined since the beginning of the SARS-CoV-2 outbreak during March 2020. The questionnaire will include demographic data, transmission route, health status, knowledge of and adherence to quarantine measurements, psychological impact on individuals and their family members including children, mental health status, and lifestyle (physical activity/sedentary behaviour, relaxation techniques, nutrition, smoking). All Cologne residents who needed to be quarantined due to a coronavirus infection and the individuals with whom they had contact will be surveyed.Ethics and disseminationNo risks have been identified and no complications are expected. Ethics approval was obtained from the Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen Human Ethics Research Committee (351/20), and the research will be conducted in accordance with the approved protocol. The results will be disseminated through peer-reviewed journals and social medicine conferences.
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Obaida, Hayder M. B., Aldo Rona, and J. Paul Gostelow. "Loss Reduction in a 1.5 Stage Axial Turbine by Computer-Driven Stator Hub Contouring." Journal of Turbomachinery 141, no. 6 (January 29, 2019). http://dx.doi.org/10.1115/1.4042305.

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Improvements in stage isentropic efficiency and reductions in total pressure loss are sought in a 1.5 stage axial turbine. This is representative of power generation equipment used in thermal power cycles, which delivers about 80% of the 20 × 1012 kWh world-wide electricity. Component-level improvements are therefore timely and important toward achieving carbon dioxide global emission targets. Secondary flow loss reduction is sought by applying a nonaxisymmetric endwall design to the turbine stator hub. A guide groove directs the pressure side branch of the horseshoe vortex away from the airfoil suction side, using a parametric endwall hub surface, which is defined as to obtain first-order smooth boundary connections to the remainder of the passage geometry. This delays the onset of the passage vortex and reduces its associated loss. The Automatic Process and Optimization Workbench (apow) generates a Kriging surrogate model from a set of Reynolds-averaged Navier–Stokes simulations, which is used to optimize the hub surface. The three-dimensional steady Reynolds-averaged Navier–Stokes model with an axisymmetric hub is validated against reference experimental measurements from the Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen. Comparative computational fluid dynamics (CFD) predictions with an optimized nonaxisymmetric hub show a decrease in the total pressure loss coefficient and an increase in the isentropic stage efficiency at and off design conditions.
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Qin, Ruihong, Yaping Ju, Lee Galloway, Stephen Spence, and Chuhua Zhang. "High Dimensional Matching Optimization of Impeller–Vaned Diffuser Interaction for a Centrifugal Compressor Stage." Journal of Turbomachinery 142, no. 12 (October 19, 2020). http://dx.doi.org/10.1115/1.4047898.

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Abstract The matching and interaction between the impeller and vaned diffuser is the most important aerodynamic-coupling between the components of a high-speed centrifugal compressor. Many research studies have been carried out during the last decade, both experimentally and numerically, on the flow mechanisms underlying impeller–vaned diffuser matching and interaction, with the aim of achieving a high-performance stage. However, the published work lacks any study that optimizes the matching of the impeller–vaned diffuser components in the environment of a full compressor stage due to two unresolved issues, i.e., identifying an effective matching optimization strategy and the high dimensional nature of the problem. To tackle these difficulties, four different optimization strategies (i.e., (1) integrated, (2) single component, (3) parallel, and (4) sequential optimization strategies) have been proposed and validated through a high dimensional matching optimization of the Radiver compressor test case published by the Institute of Jet Propulsion and Turbomachinery at Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University. Particular attention has been paid to the slope of the diffuser total pressure ratio characteristic near the surge point to further extend the stage surge margin. The results showed that the integrated optimization strategy was the most effective one for achieving good matching of the impeller–vaned diffuser interaction due to its inherently strong coupling optimization. Compared with the baseline compressor, the optimized stage achieved a gain of 1.2% in total-to-total isentropic efficiency at the peak efficiency point as well as a predicted 26.17% increase in stable operating range. For the stage examined in this study, a fore-loaded design of impeller blade as well as an increased vane angle for the diffuser vane was beneficial to the impeller–vaned diffuser matching. The more uniform spanwise distributions of the impeller discharge flow angle and the diffuser vane incidence presented the opportunity for a more optimized matching of the flow field between the 3D impeller and the 2D vaned diffuser. The outcomes of this work are particularly relevant for the advanced design of high-speed centrifugal compressors.
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Dissertations / Theses on the topic "Rheinisch-Westfälische Technische Hochschule Aachen. Hochschularchiv der RWTH Aachen"

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Grunendahl, Arno [Verfasser]. "Beitrag zur numerischen Simulation des sitzenden Menschen zur Beurteilung der Auswirkung von Ganzkörperschwingungen / RWTH, Rheinisch-Westfälische Technische Hochschule Aachen. Arno Grunendahl." Aachen : RWTH, 2004. http://d-nb.info/974016438/34.

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Giese, Steffen [Verfasser]. "Bodenbewegungen infolge von Sümpfungsmaßnahmen für tiefe Tagebaue am Beispiel des Rheinischen Braunkohlenreviers / von Steffen Giese. Geotechnik im Bauwesen, RWTH, Rheinisch-Westfälische Technische Hochschule Aachen." Aachen : RWTH, Geotechnik im Bauwesen, 2010. http://d-nb.info/1009789244/34.

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Books on the topic "Rheinisch-Westfälische Technische Hochschule Aachen. Hochschularchiv der RWTH Aachen"

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Ricking, Klaus. Der Geist bewegt die Materie: 125 Jahre Geschichte der RWTH Aachen = Mens agitat molem. Aachen: Verlag Mainz, 1995.

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2

Haude, Rüdiger. Dynamiken des Beharrens: Die Geschichte der Selbstverwaltung der RWTH Aachen seit 1945 ; ein Beitrag zur Theorie der Reformprozesse. Aachen: Alano, 1993.

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40 Jahre Hochschularchiv der RWTH Aachen. Aachen: Apprimus Verlag, 2010.

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4

(Editor), Walter Eversheim, Tilo Pfeifer (Editor), and Manfred Weck (Editor), eds. 100 Jahre Produktionstechnik: Werkzeugmaschinenlabor WZL der RWTH Aachen von 1906 bis 2006. Springer, 2006.

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Eversheim, Walter, Tilo Pfeifer, and Manfred Weck. 100 Jahre Produktionstechnik: Werkzeugmaschinenlabor WZL der RWTH Aachen Von 1906 Bis 2006. Springer London, Limited, 2006.

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Theologie an der RWTH Aachen University: Zur Geschichte der Theologie an der Technischen Hochschule Aachen in der zweiten Hälfte des 20. Jahrhunderts, 1954-2001. Aachen: Einhard Verlag, 2013.

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Book chapters on the topic "Rheinisch-Westfälische Technische Hochschule Aachen. Hochschularchiv der RWTH Aachen"

1

Westhofen, Martin, and Stephan Hackenberg. "Aachen: Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University." In Geschichte der Akademischen Lehrstätten, Lehrer, Lehrerinnen und Kliniken der Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie in Deutschland, 3–5. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-64687-8_1.

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Conference papers on the topic "Rheinisch-Westfälische Technische Hochschule Aachen. Hochschularchiv der RWTH Aachen"

1

Kadhim, Hakim T. K., Aldo Rona, Hayder M. B. Obaida, and J. Paul Gostelow. "Numerical Study of the Flow Past an Axial Turbine Stator Casing and Perspectives for its Management." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63055.

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The interaction of secondary flow with the main passage flow results in entropy generation; this accounts for considerable losses in turbomachines. Low aspect ratio blades in an axial turbine lead to a high degree of secondary flow losses. A particular interest is the reduction in secondary flow strength at the turbine casing, which adversely affects the turbine performance. This paper presents a selective review of effective techniques for improving the performance of axial turbines by turbine end wall modifications. This encompasses the use of axisymmetric and non-axisymmetric end wall contouring and the use of fences. Specific attention is given to non-axisymmetric end walls and to their effect on secondary flow losses. A baseline three-dimensional steady RANS k-ω SST model, with axisymmetric walls, is validated against experimental measurements from the Institute of Jet Propulsion and Turbomachinery at the Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen, Germany, with comparative solutions generated by ANSYS Fluent and OpenFOAM. The predicted performance of the stator passage with an axisymmetric casing is compared with that from using a contoured casing with a groove designed using the Beta distribution function for guiding the groove shape. The prediction of a reduced total pressure loss coefficient with the application of the contoured casing supports the groove design approach based on the natural path of the secondary flow features. This work also provided an automated workflow process, linking surface definition in MATLAB, meshing in ICEM CFD, and flow solving and post-processing OpenFOAM. This has generated a casing contouring design tool with a good portability to industry, to design and optimize new turbine blade passages.
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