Turbulence measurements of an inclined rectangular jet embedded in a turbulent boundary layer

✍ Scribed by Xin Zhang

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 345 KB
• Volume: 21
• Category: Article
• ISSN: 0142-727X
• DOI: 10.1016/s0142-727x(00)00012-6

✦ Synopsis

Turbulence measurements were performed of an inclined jet in an otherwise ¯at plate turbulent boundary layer. The jet was produced using a rectangular nozzle. The pitch angle of the nozzle was 30 and the skew angle varied between 0 and 135 . The speed of the jet was the same as that of the oncoming freestream. Measurements revealed modi®cations to both turbulent kinetic energy (TKE) and stress distributions around the centre of the vortex and in the near-wall region. The in¯uence of the wake of the jet featured prominently in the TKE distribution. The primary shear stress was found to be characterized by two areas of opposite signs and separated by the centre of the vortex at a skew angle higher than 30 . When the skew angle was varied, only qualitative changes were observed between 45 and 90 skew. Between 30 and 135 skew, an area of negative primary shear stress was observed between the centre of the vortex and the wall.