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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. (Postprint)
pp. 401-405, Darmstadt, ISROMAC-13, 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,
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Item Type: Conference or Workshop Item
Origin: Secondary publication service
Status: Postprint
Title: Scaling Friction and Inertia Losses for the Performance Prediction of Turbomachines
Language: English
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

Issue Number: 122
Place of Publication: Darmstadt
Publisher: ISROMAC-13
Collation: 5 Seiten
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Institute for Fluid Systems (FST)
Event Title: 13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery 2010 (ISROMAC-13)
Event Location: Honolulu, Hawaii, USA
Event Dates: 04.-07.04.2010
Date Deposited: 07 Jun 2022 13:33
Last Modified: 07 Jun 2022 13:33
DOI: 10.26083/tuprints-00020950
URN: urn:nbn:de:tuda-tuprints-209506
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20950
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