Author:
Zhong Shan,Zhang Shanying
Abstract
Abstract
This paper reports the findings from a further study of the 2D and stereo PIV data obtained in the interaction zone between the separated turbulent boundary layer over a 2D ramp and round synthetic jets by the authors. The synthetic jets are operated at two actuation frequencies with one being close to the natural frequency of the separated shear layer. Both the triple decomposition technique and Q-criterion are employed to investigate how the separated flow responds to the passage of different parts of the vortical structures produced by the synthetic jets during an actuation cycle at different synthetic jet operating conditions. An attempt is made to explain the observed differences in the ways that the separated flow responds to the actuation of synthetic jets at the two actuation frequencies. A better understanding of the mechanism of flow separation delay using round synthetic jets is obtained, leading to a more complete physical model describing the interaction mechanism.
Publisher
Springer Science and Business Media LLC
Subject
Physical and Theoretical Chemistry,General Physics and Astronomy,General Chemical Engineering
Reference45 articles.
1. Amitay, M., Cannelle, F.: Evolution of finite-span synthetic jets. Phys. Fluids 18, 054101 (2006)
2. Amitay, M., Smith, D.R., Kibens, V., Parekh, D.E., Glezer, A.: Aerodynamic flow control over an unconventional airfoil using synthetic jet actuators. AIAA J. 39(3), 361–370 (2001)
3. Bentaleb, Y., Lardeau, S., Leschziner, M.A.: Large-eddy simulation of turbulent boundary layer separation from a rounded step. J. Turbul. 13(6), 1–28 (2012)
4. Cater, J.E., Soria, J.: The evolution of round zero-net-mass-flux jets. J. Fluid Mech. 472, 167–200 (2002)
5. Cattafesta, L.N., Sheplak, M.: Actuators for active flow control. Ann. Rev. Fluid Mech. 43, 247–72 (2011)
Cited by
24 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献