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Gas-Liquid Agitation with Closed Turbine Type Impellers Modified for Blade Geometries.

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Title: Gas-Liquid Agitation with Closed Turbine Type Impellers Modified for Blade Geometries.
Authors: Yoshida, M.1 myoshida@mmm.muroran-it.ac.jp, Nakata, M.1, Itagaki, K.1, Suganuma, K.1, Kiyota, R.1, Kogami, S.1, Takahashi, Y.1
Source: Chemical & Biochemical Engineering Quarterly. 2025, Vol. 39 Issue 3, p135-142. 8p.
Subjects: Impellers, Gas-liquid interfaces, Turbine blades, Power (Mechanics), Fluid dynamics, Gas mixtures
Abstract: An agitation impeller with shrouded blades—specifically, a closed impeller—was redesigned. A closed impeller originating from a conventional turbine-type impeller was analyzed by considering the internal liquid flow characteristics. As a result, an impeller consisting of six flat blades with radially tapered widths was developed for closed-mode operation. The modified closed impeller (6RTW-FCI) was applied to gas-liquid agitation. The flow behavior of the gas-liquid mixture in the impeller region was examined with energy considerations based on the impeller power characteristics in the gassed liquid. The internal cavities of the 6RTW-FCI generated gas bubbles that moved radially outward due to the accelerated liquid flow produced by the impeller. The power characteristics of the 6RTW-FCI in terms of relative power consumption, which was with no sudden change for various aeration-agitation rates, supported energy conversion through the impeller, resulting in favorable gas-liquid dispersion. [ABSTRACT FROM AUTHOR]
Copyright of Chemical & Biochemical Engineering Quarterly is the property of Croatian Society of Chemical Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 190308863
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PubType: Academic Journal
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  Data: Gas-Liquid Agitation with Closed Turbine Type Impellers Modified for Blade Geometries.
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  Data: <searchLink fieldCode="AR" term="%22Yoshida%2C+M%2E%22">Yoshida, M.</searchLink><relatesTo>1</relatesTo><i> myoshida@mmm.muroran-it.ac.jp</i><br /><searchLink fieldCode="AR" term="%22Nakata%2C+M%2E%22">Nakata, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Itagaki%2C+K%2E%22">Itagaki, K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Suganuma%2C+K%2E%22">Suganuma, K.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kiyota%2C+R%2E%22">Kiyota, R.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Kogami%2C+S%2E%22">Kogami, S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Takahashi%2C+Y%2E%22">Takahashi, Y.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Chemical+%26+Biochemical+Engineering+Quarterly%22">Chemical & Biochemical Engineering Quarterly</searchLink>. 2025, Vol. 39 Issue 3, p135-142. 8p.
– Name: Subject
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  Data: <searchLink fieldCode="DE" term="%22Impellers%22">Impellers</searchLink><br /><searchLink fieldCode="DE" term="%22Gas-liquid+interfaces%22">Gas-liquid interfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Turbine+blades%22">Turbine blades</searchLink><br /><searchLink fieldCode="DE" term="%22Power+%28Mechanics%29%22">Power (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Gas+mixtures%22">Gas mixtures</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: An agitation impeller with shrouded blades—specifically, a closed impeller—was redesigned. A closed impeller originating from a conventional turbine-type impeller was analyzed by considering the internal liquid flow characteristics. As a result, an impeller consisting of six flat blades with radially tapered widths was developed for closed-mode operation. The modified closed impeller (6RTW-FCI) was applied to gas-liquid agitation. The flow behavior of the gas-liquid mixture in the impeller region was examined with energy considerations based on the impeller power characteristics in the gassed liquid. The internal cavities of the 6RTW-FCI generated gas bubbles that moved radially outward due to the accelerated liquid flow produced by the impeller. The power characteristics of the 6RTW-FCI in terms of relative power consumption, which was with no sudden change for various aeration-agitation rates, supported energy conversion through the impeller, resulting in favorable gas-liquid dispersion. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Chemical & Biochemical Engineering Quarterly is the property of Croatian Society of Chemical Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.15255/CABEQ.2025.2426
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 135
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        Type: general
      – SubjectFull: Gas-liquid interfaces
        Type: general
      – SubjectFull: Turbine blades
        Type: general
      – SubjectFull: Power (Mechanics)
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      – SubjectFull: Fluid dynamics
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      – SubjectFull: Gas mixtures
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    Titles:
      – TitleFull: Gas-Liquid Agitation with Closed Turbine Type Impellers Modified for Blade Geometries.
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              M: 07
              Text: 2025
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              Y: 2025
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