Experimental Assessment of Correlative Approaches for the Prediction of Leakage Flow through Labyrinth Seals
Simple analytical models can be employed to estimate the leakage mass flow rate from labyrinth seals, resulting in a quick procedure, well suited for the early design process. Different formulas were proposed by many authors during the past decades and most of them employ a carry-over factor and a f...
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| Format: | Article |
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MDPI AG
2023-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/12/6863 |
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| author | Niccolò Castelli Tommaso Bacci Alessio Picchi Lorenzo Winchler Bruno Facchini |
| author_facet | Niccolò Castelli Tommaso Bacci Alessio Picchi Lorenzo Winchler Bruno Facchini |
| author_sort | Niccolò Castelli |
| collection | DOAJ |
| description | Simple analytical models can be employed to estimate the leakage mass flow rate from labyrinth seals, resulting in a quick procedure, well suited for the early design process. Different formulas were proposed by many authors during the past decades and most of them employ a carry-over factor and a flow coefficient to predict the mass flow rate across the clearance area. The present work aims to compare the analytical prediction with the results of an experimental campaign. The experimental results were retrieved from a dedicated test rig for both a straight-through and a stepped labyrinth seal. Hence, for each seal, the effect of the clearance size, the Reynolds number and the pressure ratio has been investigated. Starting from the experimental required inputs, six different correlations are considered, with both direct and indirect methods. The results are shown as a function of pressure ratio and clearance gap. Despite some differences in the comparison, and most of the used correlation underestimate the measured mass flow rate, some general trends and guidelines can be highlighted. |
| first_indexed | 2024-03-11T02:50:10Z |
| format | Article |
| id | doaj.art-df0444edf8ec495fb0febae417932851 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-11T02:50:10Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-df0444edf8ec495fb0febae4179328512023-11-18T09:05:35ZengMDPI AGApplied Sciences2076-34172023-06-011312686310.3390/app13126863Experimental Assessment of Correlative Approaches for the Prediction of Leakage Flow through Labyrinth SealsNiccolò Castelli0Tommaso Bacci1Alessio Picchi2Lorenzo Winchler3Bruno Facchini4Department of Industrial Engineering (DIEF), University of Florence, 50139 Firenze, ItalyDepartment of Industrial Engineering (DIEF), University of Florence, 50139 Firenze, ItalyDepartment of Industrial Engineering (DIEF), University of Florence, 50139 Firenze, ItalyBaker Hughes—Nuovo Pignone Tecnologie, 50127 Firenze, ItalyDepartment of Industrial Engineering (DIEF), University of Florence, 50139 Firenze, ItalySimple analytical models can be employed to estimate the leakage mass flow rate from labyrinth seals, resulting in a quick procedure, well suited for the early design process. Different formulas were proposed by many authors during the past decades and most of them employ a carry-over factor and a flow coefficient to predict the mass flow rate across the clearance area. The present work aims to compare the analytical prediction with the results of an experimental campaign. The experimental results were retrieved from a dedicated test rig for both a straight-through and a stepped labyrinth seal. Hence, for each seal, the effect of the clearance size, the Reynolds number and the pressure ratio has been investigated. Starting from the experimental required inputs, six different correlations are considered, with both direct and indirect methods. The results are shown as a function of pressure ratio and clearance gap. Despite some differences in the comparison, and most of the used correlation underestimate the measured mass flow rate, some general trends and guidelines can be highlighted.https://www.mdpi.com/2076-3417/13/12/6863labyrinth sealsanalytical methodsexperimentalleakagesecondary flowscorrelation |
| spellingShingle | Niccolò Castelli Tommaso Bacci Alessio Picchi Lorenzo Winchler Bruno Facchini Experimental Assessment of Correlative Approaches for the Prediction of Leakage Flow through Labyrinth Seals Applied Sciences labyrinth seals analytical methods experimental leakage secondary flows correlation |
| title | Experimental Assessment of Correlative Approaches for the Prediction of Leakage Flow through Labyrinth Seals |
| title_full | Experimental Assessment of Correlative Approaches for the Prediction of Leakage Flow through Labyrinth Seals |
| title_fullStr | Experimental Assessment of Correlative Approaches for the Prediction of Leakage Flow through Labyrinth Seals |
| title_full_unstemmed | Experimental Assessment of Correlative Approaches for the Prediction of Leakage Flow through Labyrinth Seals |
| title_short | Experimental Assessment of Correlative Approaches for the Prediction of Leakage Flow through Labyrinth Seals |
| title_sort | experimental assessment of correlative approaches for the prediction of leakage flow through labyrinth seals |
| topic | labyrinth seals analytical methods experimental leakage secondary flows correlation |
| url | https://www.mdpi.com/2076-3417/13/12/6863 |
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