2-D PIV study of near-field flow development from a 2:1 elliptic jet with tabs AIAA-2007-4498
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
2-D PIV study of near-field flow development from a 2:1 elliptic jet with tabs AIAA-2007-4498
|
|
| Creator |
Verma, SB
Venkatakrishnan, L Ramesh, G |
|
| Subject |
Aeronautics (General)
|
|
| Description |
An experimental investigation is carried out to study the broad features of jet flow development13; from a 2:1 elliptic nozzle using tabs in the minor-axis plane. Further, two types of tab geometries13; are studied, namely, triangular and square with identical blockage area. Each tab conforms to13; 0.5% of the total nozzle exit area. The jet velocity is 21m/s and the Reynolds number based on13; exit equivalent diameter of the nozzle is 5400. PIV visualization studies reveal that each tab13; (irrespective of its shape) sheds a pair of counter-rotating streamwise vortices that help enhance13; overall mixing in major-axis plane. However, in the minor-axis plane, a small vortex originates13; downstream of the square tab top-edge that significantly alters the near-field jet development13; process. As the tab top-edge diminishes to a point (i.e, triangular shape), this small vortex13; structure disappears and so in this case the tab produces only a pair of counter-rotating vortices.13; The results suggest that the tab top-edge shape plays a significant role in the near-field flow13; development in jets by altering the shear layer vortex dynamics considerably.
|
|
| Date |
2007-06
|
|
| Type |
Conference or Workshop Item
PeerReviewed |
|
| Identifier |
Verma, SB and Venkatakrishnan, L and Ramesh, G (2007) 2-D PIV study of near-field flow development from a 2:1 elliptic jet with tabs AIAA-2007-4498. In: 37th AIAA Fluid Dynamics Conference and Exhibit, 25-28 Jun 2007, Miami, FL..
|
|
| Relation |
http://nal-ir.nal.res.in/5261/
|
|