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https://doi.org/10.21256/zhaw-24642| Publication type: | Article in scientific journal |
| Type of review: | Peer review (publication) |
| Title: | Ultra low temperature microturbine for magic angle spinning system |
| Authors: | Herzog, Nicoleta Weber, Alexander Séverin Purea, Armin Osen, David Knott, Benno Engelke, Frank Wilhelm, Dirk |
| et. al: | Yes |
| DOI: | 10.1115/1.4053746 10.21256/zhaw-24642 |
| Published in: | Journal of Fluids Engineering |
| Volume(Issue): | 144 |
| Issue: | 8 |
| Page(s): | 081205-1 |
| Pages to: | 081205-12 |
| Issue Date: | Aug-2022 |
| Publisher / Ed. Institution: | The American Society of Mechanical Engineers |
| ISSN: | 0098-2202 1528-901X |
| Language: | English |
| Subjects: | Nuclear magnetic resonance; Magic angle spinning; Microturbine |
| Subject (DDC): | 620: Engineering |
| Abstract: | We investigate the fluid dynamics of a microturbine system that is applied in a device for chemical and biological analysis—a so-called magic angle spinning (MAS) nuclear magnetic resonance (NMR) probe. The present system is utilized in a wide temperature range from 45K to 293 K. Pressurized air, nitrogen, or helium are used to drive a Pelton type microturbine. This turbine is mounted on a MAS rotor with a diameter between 0.7mm and 3.2 mm. The rotor system is equipped with a pressurized gas bearing that is operated by the same gas species as the turbine. Computational fluid dynamics (CFD) simulations have been performed and compared with fluid dynamics measurements of the MAS system for different diameters, temperatures, and spinning rates between 23 kHz and 120 kHz. To our knowledge, this work is the first comprehensive CFD and experimental study of such a wide temperature range that has been carried out for microturbines with pressurized gas bearings. The results show good agreement between measurements and CFD simulations with appropriate (real) gas models, i.e., the ideal gas model for air at room temperature, Peng–Robinson model for nitrogen at 105 K, and ideal gas model for helium at 45 K. |
| URI: | https://digitalcollection.zhaw.ch/handle/11475/24642 |
| Fulltext version: | Published version |
| License (according to publishing contract): | CC BY 4.0: Attribution 4.0 International |
| Departement: | School of Engineering |
| Organisational Unit: | Institute of Applied Mathematics and Physics (IAMP) Institute of Energy Systems and Fluid Engineering (IEFE) |
| Published as part of the ZHAW project: | Entwicklung eines Ultra-Low-Temperature NMR Probenkopfes für hochgeschwindigkeits Magic-Angle-Spinning Anwendungen mit Hilfe von Computational Fluid Dynamics (CFD) Simulationen |
| Appears in collections: | Publikationen School of Engineering |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 2022_Herzog-etal_Ultra-low-temp-MAS_JFE.pdf | 3.72 MB | Adobe PDF |  View/Open |
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Herzog, N., Weber, A. S., Purea, A., Osen, D., Knott, B., Engelke, F., & Wilhelm, D. (2022). Ultra low temperature microturbine for magic angle spinning system. Journal of Fluids Engineering, 144(8), 081205–081201. https://doi.org/10.1115/1.4053746
Herzog, N. et al. (2022) ‘Ultra low temperature microturbine for magic angle spinning system’, Journal of Fluids Engineering, 144(8), pp. 081205–1–081205–12. Available at: https://doi.org/10.1115/1.4053746.
N. Herzog et al., “Ultra low temperature microturbine for magic angle spinning system,” Journal of Fluids Engineering, vol. 144, no. 8, pp. 081205–1–081205–12, Aug. 2022, doi: 10.1115/1.4053746.
HERZOG, Nicoleta, Alexander Séverin WEBER, Armin PUREA, David OSEN, Benno KNOTT, Frank ENGELKE und Dirk WILHELM, 2022. Ultra low temperature microturbine for magic angle spinning system. Journal of Fluids Engineering. August 2022. Bd. 144, Nr. 8, S. 081205–1–081205–12. DOI 10.1115/1.4053746
Herzog, Nicoleta, Alexander Séverin Weber, Armin Purea, David Osen, Benno Knott, Frank Engelke, and Dirk Wilhelm. 2022. “Ultra Low Temperature Microturbine for Magic Angle Spinning System.” Journal of Fluids Engineering 144 (8): 081205–1. https://doi.org/10.1115/1.4053746.
Herzog, Nicoleta, et al. “Ultra Low Temperature Microturbine for Magic Angle Spinning System.” Journal of Fluids Engineering, vol. 144, no. 8, Aug. 2022, pp. 081205–1, https://doi.org/10.1115/1.4053746.
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