Study of the Blending Efficiency of Pitched Blade Impellers
This paper presents an analysis of the blending efficiency of pitched blade impellers under a turbulent regime of flow of an agitated low viscous liquid. The conductivity method is used to determine of the blending (homogenization) time of miscible liquids in pilot plant mixing equipment with standa...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
CTU Central Library
2001-01-01
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| Series: | Acta Polytechnica |
| Subjects: | |
| Online Access: | https://ojs.cvut.cz/ojs/index.php/ap/article/view/276 |
| _version_ | 1811303440371941376 |
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| author | I. Fořt T. Jirout F. Rieger R. Allner R. Sperling |
| author_facet | I. Fořt T. Jirout F. Rieger R. Allner R. Sperling |
| author_sort | I. Fořt |
| collection | DOAJ |
| description | This paper presents an analysis of the blending efficiency of pitched blade impellers under a turbulent regime of flow of an agitated low viscous liquid. The conductivity method is used to determine of the blending (homogenization) time of miscible liquids in pilot plant mixing equipment with standard radial baffles. For the given homogeneity degree (98 %) a three-blade pitched blade impeller is tested with various off-bottom clearances, vessel/ impeller diameter ratios and various impeller pitch angles. The experimental results show in accordance with theoretical data from the literature, that the greatest effect on the dimensionless blending time is exhibited by the vessel/ impeller diameter ratio and the impeller pitch angle. The number of total circulations necessary for reaching the chosen homogeneity degree depends on the impeller pitch angle and amounts more than three. Finally, the energetic efficiency of the blending process is calculated. The results of this study show, that the highest energetic efficiency of the three-blade pitched blade impeller appears for the pitch angle a = 24°, the impeller/vessel diameter ratio T/D = 2 and the impeller off-bottom clearance h/D = 1. |
| first_indexed | 2024-04-13T07:46:52Z |
| format | Article |
| id | doaj.art-6ef06719889b4cc8ac2dcc324c20f480 |
| institution | Directory Open Access Journal |
| issn | 1210-2709 1805-2363 |
| language | English |
| last_indexed | 2024-04-13T07:46:52Z |
| publishDate | 2001-01-01 |
| publisher | CTU Central Library |
| record_format | Article |
| series | Acta Polytechnica |
| spelling | doaj.art-6ef06719889b4cc8ac2dcc324c20f4802022-12-22T02:55:39ZengCTU Central LibraryActa Polytechnica1210-27091805-23632001-01-01416276Study of the Blending Efficiency of Pitched Blade ImpellersI. FořtT. JiroutF. RiegerR. AllnerR. SperlingThis paper presents an analysis of the blending efficiency of pitched blade impellers under a turbulent regime of flow of an agitated low viscous liquid. The conductivity method is used to determine of the blending (homogenization) time of miscible liquids in pilot plant mixing equipment with standard radial baffles. For the given homogeneity degree (98 %) a three-blade pitched blade impeller is tested with various off-bottom clearances, vessel/ impeller diameter ratios and various impeller pitch angles. The experimental results show in accordance with theoretical data from the literature, that the greatest effect on the dimensionless blending time is exhibited by the vessel/ impeller diameter ratio and the impeller pitch angle. The number of total circulations necessary for reaching the chosen homogeneity degree depends on the impeller pitch angle and amounts more than three. Finally, the energetic efficiency of the blending process is calculated. The results of this study show, that the highest energetic efficiency of the three-blade pitched blade impeller appears for the pitch angle a = 24°, the impeller/vessel diameter ratio T/D = 2 and the impeller off-bottom clearance h/D = 1.https://ojs.cvut.cz/ojs/index.php/ap/article/view/276pitched blade impellerblending of liquidsdegree of homogeneityturbulent flow |
| spellingShingle | I. Fořt T. Jirout F. Rieger R. Allner R. Sperling Study of the Blending Efficiency of Pitched Blade Impellers Acta Polytechnica pitched blade impeller blending of liquids degree of homogeneity turbulent flow |
| title | Study of the Blending Efficiency of Pitched Blade Impellers |
| title_full | Study of the Blending Efficiency of Pitched Blade Impellers |
| title_fullStr | Study of the Blending Efficiency of Pitched Blade Impellers |
| title_full_unstemmed | Study of the Blending Efficiency of Pitched Blade Impellers |
| title_short | Study of the Blending Efficiency of Pitched Blade Impellers |
| title_sort | study of the blending efficiency of pitched blade impellers |
| topic | pitched blade impeller blending of liquids degree of homogeneity turbulent flow |
| url | https://ojs.cvut.cz/ojs/index.php/ap/article/view/276 |
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