The Effect of Single Dielectric Barrier Discharge Actuators in Reducing Drag on an Ahmed Body
The feasibility of a single dielectric barrier discharge (SDBD) actuator in controlling flow over an Ahmed body, representing a simplified car model, has been numerically and experimentally investigated at Reynolds numbers of <inline-formula><math display="inline"><semantics...
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MDPI AG
2020-12-01
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| Series: | Fluids |
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| Online Access: | https://www.mdpi.com/2311-5521/5/4/244 |
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| author | Saber Karimi Arash Zargar Mahmoud Mani Arman Hemmati |
| author_facet | Saber Karimi Arash Zargar Mahmoud Mani Arman Hemmati |
| author_sort | Saber Karimi |
| collection | DOAJ |
| description | The feasibility of a single dielectric barrier discharge (SDBD) actuator in controlling flow over an Ahmed body, representing a simplified car model, has been numerically and experimentally investigated at Reynolds numbers of <inline-formula><math display="inline"><semantics><mrow><mn>7.68</mn><mo>×</mo><msup><mn>10</mn><mn>5</mn></msup></mrow></semantics></math></inline-formula> and <inline-formula><math display="inline"><semantics><mrow><mn>2.25</mn><mo>×</mo><msup><mn>10</mn><mn>5</mn></msup></mrow></semantics></math></inline-formula>. The Ahmed body had slant angles of <inline-formula><math display="inline"><semantics><msup><mn>25</mn><mo>∘</mo></msup></semantics></math></inline-formula> and <inline-formula><math display="inline"><semantics><msup><mn>35</mn><mo>∘</mo></msup></semantics></math></inline-formula>. The results showed that SDBD actuators could significantly enhance the aerodynamic performance of the Ahmed body. Several arrangements of the actuators on the slant surface and the rear face of the model were examined to identify the most effective arrangement for drag reduction. This arrangement resulted in an approximately <inline-formula><math display="inline"><semantics><mrow><mn>6.1</mn><mo>%</mo></mrow></semantics></math></inline-formula> drag reduction. This improvement in aerodynamic performance is attributed to the alteration of three-dimensional wake structures due to the presence of SDBD, which coincides with surface pressure variations on the slant and rear faces of the Ahmed body. |
| first_indexed | 2024-03-10T14:03:51Z |
| format | Article |
| id | doaj.art-5d1c2eaef6334a7fb1f6a081a5754224 |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-10T14:03:51Z |
| publishDate | 2020-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-5d1c2eaef6334a7fb1f6a081a57542242023-11-21T00:53:43ZengMDPI AGFluids2311-55212020-12-015424410.3390/fluids5040244The Effect of Single Dielectric Barrier Discharge Actuators in Reducing Drag on an Ahmed BodySaber Karimi0Arash Zargar1Mahmoud Mani2Arman Hemmati3Department of Aerospace Engineering & Center of Excellence for Computational Aerospace Engineering, AmirKabir University, Tehran 1591634311, IranDepartment of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 1H9, CanadaDepartment of Aerospace Engineering & Center of Excellence for Computational Aerospace Engineering, AmirKabir University, Tehran 1591634311, IranDepartment of Mechanical Engineering, University of Alberta, Edmonton, AB T6G 1H9, CanadaThe feasibility of a single dielectric barrier discharge (SDBD) actuator in controlling flow over an Ahmed body, representing a simplified car model, has been numerically and experimentally investigated at Reynolds numbers of <inline-formula><math display="inline"><semantics><mrow><mn>7.68</mn><mo>×</mo><msup><mn>10</mn><mn>5</mn></msup></mrow></semantics></math></inline-formula> and <inline-formula><math display="inline"><semantics><mrow><mn>2.25</mn><mo>×</mo><msup><mn>10</mn><mn>5</mn></msup></mrow></semantics></math></inline-formula>. The Ahmed body had slant angles of <inline-formula><math display="inline"><semantics><msup><mn>25</mn><mo>∘</mo></msup></semantics></math></inline-formula> and <inline-formula><math display="inline"><semantics><msup><mn>35</mn><mo>∘</mo></msup></semantics></math></inline-formula>. The results showed that SDBD actuators could significantly enhance the aerodynamic performance of the Ahmed body. Several arrangements of the actuators on the slant surface and the rear face of the model were examined to identify the most effective arrangement for drag reduction. This arrangement resulted in an approximately <inline-formula><math display="inline"><semantics><mrow><mn>6.1</mn><mo>%</mo></mrow></semantics></math></inline-formula> drag reduction. This improvement in aerodynamic performance is attributed to the alteration of three-dimensional wake structures due to the presence of SDBD, which coincides with surface pressure variations on the slant and rear faces of the Ahmed body.https://www.mdpi.com/2311-5521/5/4/244Ahmed bodydrag reductionactuationsingle dielectric barrier dischargeSDBD |
| spellingShingle | Saber Karimi Arash Zargar Mahmoud Mani Arman Hemmati The Effect of Single Dielectric Barrier Discharge Actuators in Reducing Drag on an Ahmed Body Fluids Ahmed body drag reduction actuation single dielectric barrier discharge SDBD |
| title | The Effect of Single Dielectric Barrier Discharge Actuators in Reducing Drag on an Ahmed Body |
| title_full | The Effect of Single Dielectric Barrier Discharge Actuators in Reducing Drag on an Ahmed Body |
| title_fullStr | The Effect of Single Dielectric Barrier Discharge Actuators in Reducing Drag on an Ahmed Body |
| title_full_unstemmed | The Effect of Single Dielectric Barrier Discharge Actuators in Reducing Drag on an Ahmed Body |
| title_short | The Effect of Single Dielectric Barrier Discharge Actuators in Reducing Drag on an Ahmed Body |
| title_sort | effect of single dielectric barrier discharge actuators in reducing drag on an ahmed body |
| topic | Ahmed body drag reduction actuation single dielectric barrier discharge SDBD |
| url | https://www.mdpi.com/2311-5521/5/4/244 |
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