Flow Angularity Investigations in an Automotive Slotted Wall Wind Tunnel.
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| Title: | Flow Angularity Investigations in an Automotive Slotted Wall Wind Tunnel. |
|---|---|
| Authors: | Ljungskog, Emil1 (AUTHOR) emil.ljungskog@chalmers.se, Sebben, Simone1 (AUTHOR) simone.sebben@chalmers.se, Broniewicz, Alexander2 (AUTHOR) alexander.broniewicz@volvocars.com |
| Source: | Energies (19961073). Dec2019, Vol. 12 Issue 23, p4575. 1p. 2 Color Photographs, 6 Diagrams, 2 Charts, 3 Graphs. |
| Subject Terms: | *Wind tunnels, *Heat exchangers, *Turbulence, *Tunnels |
| Abstract: | The Volvo Cars aerodynamic wind tunnel has had a vortical flow angularity pattern in the test section since its original commissioning in 1986. The vortical flow nature persisted after an upgrade in 2006, when the fan was replaced and a moving ground system was introduced. It has been hypothesized that the cause for this flow angularity pattern was leakages around the heat exchanger installed in the settling chamber. The present paper tests this hypothesis by measuring the flow angularity in the test section before and after sealing the leakages. The findings show that the leakage path around the heat exchanger does not influence the flow angularity, and that the current pattern is different compared to the commissioning after the upgrade. This prompted an investigation of the influence from the turbulence screens, which were changed after the upgrade commissioning. These investigations indicate that the probable cause of the vortical flow angularity pattern is residual swirl from the fan. Force measurements on a reference car with and without extra induced flow angularity show that the flow angles measured in the tunnel for regular operation are most likely small enough to not have a significant effect on the measured aerodynamic forces. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 140162060 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Flow Angularity Investigations in an Automotive Slotted Wall Wind Tunnel. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Ljungskog%2C+Emil%22">Ljungskog, Emil</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> emil.ljungskog@chalmers.se</i><br /><searchLink fieldCode="AR" term="%22Sebben%2C+Simone%22">Sebben, Simone</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> simone.sebben@chalmers.se</i><br /><searchLink fieldCode="AR" term="%22Broniewicz%2C+Alexander%22">Broniewicz, Alexander</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> alexander.broniewicz@volvocars.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Dec2019, Vol. 12 Issue 23, p4575. 1p. 2 Color Photographs, 6 Diagrams, 2 Charts, 3 Graphs. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Wind+tunnels%22">Wind tunnels</searchLink><br />*<searchLink fieldCode="DE" term="%22Heat+exchangers%22">Heat exchangers</searchLink><br />*<searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink><br />*<searchLink fieldCode="DE" term="%22Tunnels%22">Tunnels</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The Volvo Cars aerodynamic wind tunnel has had a vortical flow angularity pattern in the test section since its original commissioning in 1986. The vortical flow nature persisted after an upgrade in 2006, when the fan was replaced and a moving ground system was introduced. It has been hypothesized that the cause for this flow angularity pattern was leakages around the heat exchanger installed in the settling chamber. The present paper tests this hypothesis by measuring the flow angularity in the test section before and after sealing the leakages. The findings show that the leakage path around the heat exchanger does not influence the flow angularity, and that the current pattern is different compared to the commissioning after the upgrade. This prompted an investigation of the influence from the turbulence screens, which were changed after the upgrade commissioning. These investigations indicate that the probable cause of the vortical flow angularity pattern is residual swirl from the fan. Force measurements on a reference car with and without extra induced flow angularity show that the flow angles measured in the tunnel for regular operation are most likely small enough to not have a significant effect on the measured aerodynamic forces. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=140162060 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en12234575 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: 4575 Subjects: – SubjectFull: Wind tunnels Type: general – SubjectFull: Heat exchangers Type: general – SubjectFull: Turbulence Type: general – SubjectFull: Tunnels Type: general Titles: – TitleFull: Flow Angularity Investigations in an Automotive Slotted Wall Wind Tunnel. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Ljungskog, Emil – PersonEntity: Name: NameFull: Sebben, Simone – PersonEntity: Name: NameFull: Broniewicz, Alexander IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2019 Type: published Y: 2019 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 12 – Type: issue Value: 23 Titles: – TitleFull: Energies (19961073) Type: main |
| ResultId | 1 |
