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Anti-icing hot air jet heat transfer augmentation employing inner channels.

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Title: Anti-icing hot air jet heat transfer augmentation employing inner channels.
Authors: Saeed, Farooq1 (AUTHOR) fsaeed@iau.edu.sa, Ahmed, Kamran Z2 (AUTHOR), Owes, Amro OE1 (AUTHOR), Paraschivoiu, Ion3 (AUTHOR)
Source: Advances in Mechanical Engineering (Sage Publications Inc.). Dec2021, Vol. 13 Issue 12, p1-13. 13p.
Subjects: Bombardier Aerospace, Heat transfer, Air jets, Ice prevention & control, Reynolds number, Curved surfaces, Jet impingement
Abstract: Many approaches exist today that employ hot-air from aircraft compressor bleed for anti-icing critical aircraft surfaces. This paper introduces and numerically analyzes the novel application of an inner or etched channel to augment heat transfer from a hot-air jet impinging on a curved surface representing the inner surface of an aircraft wing's leading edge or slat. The study shows that proper positioning, geometry, and flow characteristics of a channel along the inner surface of the leading edge can significantly enhance heat transfer, boost the anti-icing system performance, and greatly enhance flight safety during critical icing weather conditions. Commercially available CFD software, ANSYS Fluent is used to model and analyze the effect of different geometric and flow parameters typical of those found in small to medium category commercial transport aircraft to help determine the optimum arrangement. These parameters include: (1) jet nozzle height-to-slot diameter ratios from 4 to 8, (2) channel width-to-slot diameter ratios from 0.4 to 1.8, and (3) inner-channel inlet location angles from 10° to 60°. Each configuration resulting from a combination of the above parameters was simulated at Reynolds numbers based on jet-slot diameter of 30,000, 60,000, and 90,000. Empirical relations based on available experimental data are used to validate the results. The main findings of the study reveal that the jet height-to-slot diameter ratio of 6, inner channel height-to-slot diameter ratios of 1.8, and inner-channel inlet angular locations of 10° combination resulted in the highest heat transfer at all Reynolds number as well as higher at increased Reynold numbers. Graphical abstract Description of figures: (a) RAE 2822 airfoil with a modified leading edge to incorporate, (b) a typical wing leading slat, (c) internal layout of the piccolo tube inside a typical edge slat (Courtesy of Bombardier Aerospace), (d) numerical simulation of heat transfer from the hot-air jet from a piccolo tube impinging on the inner surface of the slat, and (e) numerical model with etched channel (novel idea) for enhanced heat transfer being investigated in current study. [ABSTRACT FROM AUTHOR]
Copyright of Advances in Mechanical Engineering (Sage Publications Inc.) is the property of Sage Publications Inc. 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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Header DbId: egs
DbLabel: Engineering Source
An: 154320411
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Data: Anti-icing hot air jet heat transfer augmentation employing inner channels.
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  Data: <searchLink fieldCode="AR" term="%22Saeed%2C+Farooq%22">Saeed, Farooq</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> fsaeed@iau.edu.sa</i><br /><searchLink fieldCode="AR" term="%22Ahmed%2C+Kamran+Z%22">Ahmed, Kamran Z</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Owes%2C+Amro+OE%22">Owes, Amro OE</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Paraschivoiu%2C+Ion%22">Paraschivoiu, Ion</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="DE" term="%22Bombardier+Aerospace%22">Bombardier Aerospace</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+transfer%22">Heat transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Air+jets%22">Air jets</searchLink><br /><searchLink fieldCode="DE" term="%22Ice+prevention+%26+control%22">Ice prevention & control</searchLink><br /><searchLink fieldCode="DE" term="%22Reynolds+number%22">Reynolds number</searchLink><br /><searchLink fieldCode="DE" term="%22Curved+surfaces%22">Curved surfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Jet+impingement%22">Jet impingement</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Many approaches exist today that employ hot-air from aircraft compressor bleed for anti-icing critical aircraft surfaces. This paper introduces and numerically analyzes the novel application of an inner or etched channel to augment heat transfer from a hot-air jet impinging on a curved surface representing the inner surface of an aircraft wing's leading edge or slat. The study shows that proper positioning, geometry, and flow characteristics of a channel along the inner surface of the leading edge can significantly enhance heat transfer, boost the anti-icing system performance, and greatly enhance flight safety during critical icing weather conditions. Commercially available CFD software, ANSYS Fluent is used to model and analyze the effect of different geometric and flow parameters typical of those found in small to medium category commercial transport aircraft to help determine the optimum arrangement. These parameters include: (1) jet nozzle height-to-slot diameter ratios from 4 to 8, (2) channel width-to-slot diameter ratios from 0.4 to 1.8, and (3) inner-channel inlet location angles from 10° to 60°. Each configuration resulting from a combination of the above parameters was simulated at Reynolds numbers based on jet-slot diameter of 30,000, 60,000, and 90,000. Empirical relations based on available experimental data are used to validate the results. The main findings of the study reveal that the jet height-to-slot diameter ratio of 6, inner channel height-to-slot diameter ratios of 1.8, and inner-channel inlet angular locations of 10° combination resulted in the highest heat transfer at all Reynolds number as well as higher at increased Reynold numbers. Graphical abstract Description of figures: (a) RAE 2822 airfoil with a modified leading edge to incorporate, (b) a typical wing leading slat, (c) internal layout of the piccolo tube inside a typical edge slat (Courtesy of Bombardier Aerospace), (d) numerical simulation of heat transfer from the hot-air jet from a piccolo tube impinging on the inner surface of the slat, and (e) numerical model with etched channel (novel idea) for enhanced heat transfer being investigated in current study. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Advances in Mechanical Engineering (Sage Publications Inc.) is the property of Sage Publications Inc. 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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    Identifiers:
      – Type: doi
        Value: 10.1177/16878140211066212
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 13
        StartPage: 1
    Subjects:
      – SubjectFull: Bombardier Aerospace
        Type: general
      – SubjectFull: Heat transfer
        Type: general
      – SubjectFull: Air jets
        Type: general
      – SubjectFull: Ice prevention & control
        Type: general
      – SubjectFull: Reynolds number
        Type: general
      – SubjectFull: Curved surfaces
        Type: general
      – SubjectFull: Jet impingement
        Type: general
    Titles:
      – TitleFull: Anti-icing hot air jet heat transfer augmentation employing inner channels.
        Type: main
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            NameFull: Saeed, Farooq
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            NameFull: Ahmed, Kamran Z
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            NameFull: Owes, Amro OE
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            NameFull: Paraschivoiu, Ion
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            – D: 01
              M: 12
              Text: Dec2021
              Type: published
              Y: 2021
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              Value: 13
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              Value: 12
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