03.3 - Basic Fluid Dynamics and Flow Control
MEASUREMENTS OF T-S WAVES DUE TO ACOUSTIC DISTURBANCES IN EXPERIMENTS
Z. Cao¹, P.F. Li¹, D. Li¹; ¹Northwestern Polytechnical University, China
Boundary-layer receptivity to external disturbances is the beginning of transition from laminar to turbulent flow and it still remains unclear especially in experiments mainly because of the difficulty to separate T-S waves from other interference like Stokes layer. This work carried out the full process of a receptivity experiment under two type of acoustic disturbances (the continuous forcing and the pulsed forcing) and successfully extracted the T-S waves from the Stokes, which enrich the development of the experimental measurements on instability and has a reference meaning for others who want to implement a familiar experiment.