An experimental investigation of unsteady wake-boundary-layer interaction

✍ Scribed by R.L. Evans; R.S.K. Yip

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 514 KB
• Volume: 2
• Category: Article
• ISSN: 0889-9746
• DOI: 10.1016/s0889-9746(88)90037-0

✦ Synopsis

The unsteady turbulent boundary layer development on turbomachinery blading has been simulated by a two-dimensional experiment in a wind tunnel. The periodic passage of rotor wakes has been found to strongly influence boundary layer development. Time-mean measurements of the velocity profile have shown an increase in the fullness of the profile compared to the steady flow case. Ensemble-averaged velocity measurements indicated that a maximum velocity defect amplitude occurs in the inner layer and that this amplitude decays with distance from the leading edge. The inner layer velocity was also found to have a substantial phase lag which increased with distance from the leading edge.