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Average Vaporisation Rate in Turbulent Subcritical Two-Phase Flow.

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Title: Average Vaporisation Rate in Turbulent Subcritical Two-Phase Flow.
Authors: Sidhu, M. S.1, Burluka, A. A.1 A.A.Burluka@leeds.ac.uk
Source: Combustion Science & Technology. May2008, Vol. 180 Issue 5, p975-996. 22p. 1 Diagram, 7 Graphs.
Subjects: Turbulence, Fluid dynamics, Evaporation (Chemistry), Vapor pressure, Pressure, Temperature
Abstract: This work considers alternative expressions for turbulent evaporation rate used in the framework of an entirely Eulerian model based on a transport equation for the average liquid surface area. Commonly employed expressions for vaporisation rate derived from Spalding-Godsave theory fail to account for vaporisation enhancement induced by turbulence; moreover, they do not describe experimentally observed fact that the pressure affects vaporisation rate differently in a turbulent and a laminar flow. To address these shortcomings, an alternative formula for the vaporisation rate is proposed based on an assumption that the vaporisation rate is governed by a small-scale turbulence. This model is assessed for a range of pressure and temperature conditions, using experiments of Brandt et al. (1997a) performed in a premix duct with a flat-bed atomiser as the test case. Turbulence intensities and scales in the chosen test case are typical for a modern gas-turbine combustion chamber. This new expression results in prediction of evaporation rate and SMD in a good agreement with experimental results. [ABSTRACT FROM AUTHOR]
Copyright of Combustion Science & Technology is the property of Taylor & Francis Ltd 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.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 31611600
AccessLevel: 6
PubType: Academic Journal
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  Data: Average Vaporisation Rate in Turbulent Subcritical Two-Phase Flow.
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  Data: <searchLink fieldCode="AR" term="%22Sidhu%2C+M%2E+S%2E%22">Sidhu, M. S.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Burluka%2C+A%2E+A%2E%22">Burluka, A. A.</searchLink><relatesTo>1</relatesTo><i> A.A.Burluka@leeds.ac.uk</i>
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  Data: <searchLink fieldCode="JN" term="%22Combustion+Science+%26+Technology%22">Combustion Science & Technology</searchLink>. May2008, Vol. 180 Issue 5, p975-996. 22p. 1 Diagram, 7 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Evaporation+%28Chemistry%29%22">Evaporation (Chemistry)</searchLink><br /><searchLink fieldCode="DE" term="%22Vapor+pressure%22">Vapor pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Pressure%22">Pressure</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature%22">Temperature</searchLink>
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  Data: This work considers alternative expressions for turbulent evaporation rate used in the framework of an entirely Eulerian model based on a transport equation for the average liquid surface area. Commonly employed expressions for vaporisation rate derived from Spalding-Godsave theory fail to account for vaporisation enhancement induced by turbulence; moreover, they do not describe experimentally observed fact that the pressure affects vaporisation rate differently in a turbulent and a laminar flow. To address these shortcomings, an alternative formula for the vaporisation rate is proposed based on an assumption that the vaporisation rate is governed by a small-scale turbulence. This model is assessed for a range of pressure and temperature conditions, using experiments of Brandt et al. (1997a) performed in a premix duct with a flat-bed atomiser as the test case. Turbulence intensities and scales in the chosen test case are typical for a modern gas-turbine combustion chamber. This new expression results in prediction of evaporation rate and SMD in a good agreement with experimental results. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Combustion Science & Technology is the property of Taylor & Francis Ltd 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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        Value: 10.1080/00102200801893796
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        Text: English
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        PageCount: 22
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      – SubjectFull: Turbulence
        Type: general
      – SubjectFull: Fluid dynamics
        Type: general
      – SubjectFull: Evaporation (Chemistry)
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      – SubjectFull: Vapor pressure
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      – SubjectFull: Temperature
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              Text: May2008
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