A Novel Method for Defining the Leeward Edge of the Planar Jet in Crossflow
To avoid the complexity of the edge definition by the half width, a new approach to defining the leeward edge of the planar jet in crossflow is introduced in this paper. Particle Image Velocimetry (PIV) experiments were performed to measure different flow regimes within the single jet and the dual j...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Isfahan University of Technology
2017-01-01
|
| Series: | Journal of Applied Fluid Mechanics |
| Subjects: | |
| Online Access: | http://jafmonline.net/JournalArchive/download?file_ID=43345&issue_ID=242 |
| _version_ | 1830352663637655552 |
|---|---|
| author | K. Zhao X. Yang Patrick N Okolo Z. Wu W. Zhang G. J. Bennett |
| author_facet | K. Zhao X. Yang Patrick N Okolo Z. Wu W. Zhang G. J. Bennett |
| author_sort | K. Zhao |
| collection | DOAJ |
| description | To avoid the complexity of the edge definition by the half width, a new approach to defining the leeward edge of the planar jet in crossflow is introduced in this paper. Particle Image Velocimetry (PIV) experiments were performed to measure different flow regimes within the single jet and the dual jets configurations in crossflow. Based on the experimental data acquired, a series of velocity profiles were extracted from the flow field. In each profile, a velocity threshold was given to distinguish the regions sheltered and the regions not sheltered by the planar jet. The boundary of these regions was accordingly recognized as the leeward edge. Furthermore, fitting of the edge was carried out using a second order polynomial so as to enable a mathematical expression of the leeward edge. An application of the proposed approach towards the flow induced noise reduction using a planar jet is also discussed in this paper. In addition, the PIV frame assembly algorithm used in this study is reported. |
| first_indexed | 2024-12-20T00:59:32Z |
| format | Article |
| id | doaj.art-55475fe0efa345d98085f5c8c36270f3 |
| institution | Directory Open Access Journal |
| issn | 1735-3572 |
| language | English |
| last_indexed | 2024-12-20T00:59:32Z |
| publishDate | 2017-01-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Journal of Applied Fluid Mechanics |
| spelling | doaj.art-55475fe0efa345d98085f5c8c36270f32022-12-21T19:59:01ZengIsfahan University of TechnologyJournal of Applied Fluid Mechanics1735-35722017-01-0110514751486.A Novel Method for Defining the Leeward Edge of the Planar Jet in CrossflowK. Zhao0X. Yang1Patrick N Okolo2Z. Wu3W. Zhang4G. J. Bennett5Key Laboratory of Aerodynamic Noise Control, China Aerodynamics Research and Development Center, Mianyang, 621000, ChinaCollege of Aerospace Science and Engineering, National University of Defence TechnologyDepartment of Mechanical and Manufacturing Engineering, Trinity College, University of Dublin, Dublin 2, Dublin, IrelandCollege of Aerospace Science and Engineering, National University of Defence TechnologyCollege of Aerospace Science and Engineering, National University of Defence TechnologyDepartment of Mechanical and Manufacturing Engineering, Trinity College Dublin, University of DublinTo avoid the complexity of the edge definition by the half width, a new approach to defining the leeward edge of the planar jet in crossflow is introduced in this paper. Particle Image Velocimetry (PIV) experiments were performed to measure different flow regimes within the single jet and the dual jets configurations in crossflow. Based on the experimental data acquired, a series of velocity profiles were extracted from the flow field. In each profile, a velocity threshold was given to distinguish the regions sheltered and the regions not sheltered by the planar jet. The boundary of these regions was accordingly recognized as the leeward edge. Furthermore, fitting of the edge was carried out using a second order polynomial so as to enable a mathematical expression of the leeward edge. An application of the proposed approach towards the flow induced noise reduction using a planar jet is also discussed in this paper. In addition, the PIV frame assembly algorithm used in this study is reported.http://jafmonline.net/JournalArchive/download?file_ID=43345&issue_ID=242Planar jet; Crossflow; Leeward edge; PIV; Flow-induced noise reduction. |
| spellingShingle | K. Zhao X. Yang Patrick N Okolo Z. Wu W. Zhang G. J. Bennett A Novel Method for Defining the Leeward Edge of the Planar Jet in Crossflow Journal of Applied Fluid Mechanics Planar jet; Crossflow; Leeward edge; PIV; Flow-induced noise reduction. |
| title | A Novel Method for Defining the Leeward Edge of the Planar Jet in Crossflow |
| title_full | A Novel Method for Defining the Leeward Edge of the Planar Jet in Crossflow |
| title_fullStr | A Novel Method for Defining the Leeward Edge of the Planar Jet in Crossflow |
| title_full_unstemmed | A Novel Method for Defining the Leeward Edge of the Planar Jet in Crossflow |
| title_short | A Novel Method for Defining the Leeward Edge of the Planar Jet in Crossflow |
| title_sort | novel method for defining the leeward edge of the planar jet in crossflow |
| topic | Planar jet; Crossflow; Leeward edge; PIV; Flow-induced noise reduction. |
| url | http://jafmonline.net/JournalArchive/download?file_ID=43345&issue_ID=242 |
| work_keys_str_mv | AT kzhao anovelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT xyang anovelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT patricknokolo anovelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT zwu anovelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT wzhang anovelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT gjbennett anovelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT kzhao novelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT xyang novelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT patricknokolo novelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT zwu novelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT wzhang novelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow AT gjbennett novelmethodfordefiningtheleewardedgeoftheplanarjetincrossflow |