| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1861089 | Physics Letters A | 2015 | 7 Pages |
•The three-dimensional initial flow fields of supersonic square and circular jets have been simulated numerically.•The axis switching mechanism of square vortex loop has been illustrated and discussed.•Both the axis switching and stream-wise vortices can enhance the entrainment and mixing of the square jet.
Based on large eddy simulation (LES) combined with the high-order hybrid schemes, the flow characteristics of both supersonic circular and square jets were investigated numerically for Ma=1.4Ma=1.4. Our results illustrate the three-dimensional (3D) structures and their evolutions of both circular and square jets, as well as the shock structures of both jets. Moreover, the phenomena of 45° axis switching and stream-wise vortices enhancing the entrainment and mixing process of the square jet were also identified and discussed in detail.
