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Scaling Friction and Inertia Losses for the Performance Prediction of Turbomachines

Pelz, Peter F. ; Heß, Michael (2022)
Scaling Friction and Inertia Losses for the Performance Prediction of Turbomachines.
13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery 2010 (ISROMAC-13). Honolulu, Hawaii, USA (04.-07.04.2010)
doi: 10.26083/tuprints-00020950
Konferenzveröffentlichung, Zweitveröffentlichung, Postprint

Kurzbeschreibung (Abstract)

In practice measurements during the design process or for final inspections often cannot be carried out on full scale machines. Mostly it is too costly to build an own test rig for each machine, so test rigs with standardized diameters and measuring equipment are used. Sometimes the diameters of the real scale machines are so large that a measurement is utterly impossible. Examples are water turbines or fans used for cooling in power plants – these machines may have diameters of several meters and require a brake respec- tively drive power in the MW range. On the opposite machines with diameters of only a few millimeters do not allow the operation of established invasive measuring techniques – such as Pitot-tubes, five hole probes or hot wire anemometry – because of the signifi- cant influence of the probes on the flow field. Hence measurements to determine the performance are carried out on models which are down or up scaled. As was shown by Spurk (1992) a full similarity between model and prototype machine is in the context of turbo- machines possible as long as the Mach number is small, i.e. the compressibility can be neglected

Typ des Eintrags: Konferenzveröffentlichung
Erschienen: 2022
Autor(en): Pelz, Peter F. ; Heß, Michael
Art des Eintrags: Zweitveröffentlichung
Titel: Scaling Friction and Inertia Losses for the Performance Prediction of Turbomachines
Sprache: Englisch
Publikationsjahr: 2022
Ort: Darmstadt
Verlag: ISROMAC-13
(Heft-)Nummer: 122
Kollation: 5 Seiten
Veranstaltungstitel: 13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery 2010 (ISROMAC-13)
Veranstaltungsort: Honolulu, Hawaii, USA
Veranstaltungsdatum: 04.-07.04.2010
DOI: 10.26083/tuprints-00020950
URL / URN: https://tuprints.ulb.tu-darmstadt.de/20950
Herkunft: Zweitveröffentlichungsservice
Kurzbeschreibung (Abstract):

In practice measurements during the design process or for final inspections often cannot be carried out on full scale machines. Mostly it is too costly to build an own test rig for each machine, so test rigs with standardized diameters and measuring equipment are used. Sometimes the diameters of the real scale machines are so large that a measurement is utterly impossible. Examples are water turbines or fans used for cooling in power plants – these machines may have diameters of several meters and require a brake respec- tively drive power in the MW range. On the opposite machines with diameters of only a few millimeters do not allow the operation of established invasive measuring techniques – such as Pitot-tubes, five hole probes or hot wire anemometry – because of the signifi- cant influence of the probes on the flow field. Hence measurements to determine the performance are carried out on models which are down or up scaled. As was shown by Spurk (1992) a full similarity between model and prototype machine is in the context of turbo- machines possible as long as the Mach number is small, i.e. the compressibility can be neglected

Status: Postprint
URN: urn:nbn:de:tuda-tuprints-209506
Sachgruppe der Dewey Dezimalklassifikatin (DDC): 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften und Maschinenbau
Fachbereich(e)/-gebiet(e): 16 Fachbereich Maschinenbau
16 Fachbereich Maschinenbau > Institut für Fluidsystemtechnik (FST) (seit 01.10.2006)
Hinterlegungsdatum: 07 Jun 2022 13:33
Letzte Änderung: 08 Jun 2022 06:25
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