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Efficiency Scaling: Influence of Reynolds and Mach Numbers on Fan Performance

Pelz, Peter F. ; Saul, Sebastian ; Brötz, Johannes (2022)
Efficiency Scaling: Influence of Reynolds and Mach Numbers on Fan Performance.
In: Journal of Turbomachinery, 2022, 144 (6)
doi: 10.26083/tuprints-00020809
Article, Secondary publication, Publisher's Version

Abstract

The efficiency, pressure ratio, and shaft power of a fan depends on type, size, working medium, and operating condition. For acceptance tests, a dissimilarity in Reynolds number, Mach number, relative roughness, and relative blade tip clearance of the scaled model and prototype is unavoidable. Hence, the efficiency differs between model and prototype. This difference is quantified by scaling methods. This article presents a validated and physics based, i.e., reliable scaling method for the efficiency, pressure ratio, and shaft power of axial and centrifugal fans operating at subsonic conditions. The method is validated using test results gained on standardized test rigs for different fan types, sizes, and operating conditions. For all scenarios, the presented scaling method provides a much reduced scaling uncertainty compared to the reference method described in ISO 13348.

Item Type: Article
Erschienen: 2022
Creators: Pelz, Peter F. ; Saul, Sebastian ; Brötz, Johannes
Type of entry: Secondary publication
Title: Efficiency Scaling: Influence of Reynolds and Mach Numbers on Fan Performance
Language: English
Date: 2022
Year of primary publication: 2022
Publisher: ASME
Journal or Publication Title: Journal of Turbomachinery
Volume of the journal: 144
Issue Number: 6
Collation: 12 Seiten
DOI: 10.26083/tuprints-00020809
URL / URN: https://tuprints.ulb.tu-darmstadt.de/20809
Corresponding Links:
Origin: Secondary publication service
Abstract:

The efficiency, pressure ratio, and shaft power of a fan depends on type, size, working medium, and operating condition. For acceptance tests, a dissimilarity in Reynolds number, Mach number, relative roughness, and relative blade tip clearance of the scaled model and prototype is unavoidable. Hence, the efficiency differs between model and prototype. This difference is quantified by scaling methods. This article presents a validated and physics based, i.e., reliable scaling method for the efficiency, pressure ratio, and shaft power of axial and centrifugal fans operating at subsonic conditions. The method is validated using test results gained on standardized test rigs for different fan types, sizes, and operating conditions. For all scenarios, the presented scaling method provides a much reduced scaling uncertainty compared to the reference method described in ISO 13348.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-208091
Classification DDC: 600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 16 Department of Mechanical Engineering
16 Department of Mechanical Engineering > Institute for Fluid Systems (FST) (since 01.10.2006)
16 Department of Mechanical Engineering > Institute for Fluid Systems (FST) (since 01.10.2006) > Sustainable System Design
Date Deposited: 02 Mar 2022 12:07
Last Modified: 03 Mar 2022 06:10
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