The control of transition from a laminar to a turbulent flow over a flat plate using localized dynamic surface modifications was explored experimentally in Rensselaer Polytechnic Institute’s subsonic wind tunnel. Dynamic surface modification, via a pair of Piezoelectrically Driven Oscillating Surface (PDOS) actuators, was used to excite and control the T-S wave over a flat plate. Creating an upstream, localized small disturbance at the most amplified frequency of fact = 250 Hz led to phase-locking the T-S wave. This enabled observation of the excited T-S wave using phase-locked stereoscopic particle image velocimetry. The growth of the T-S wave as it moved downstream was also measured using this technique (25% growth over four wavelengths of the excited wave). Activation of a downstream PDOS actuator (in addition to the upstream PDOS) at the appropriate amplitude and phase shift resulted in attenuation of the peak amplitude of the coherent velocity fluctuations (by up to 68%) and a substantial reduction of the degree of coherence of the T-S wave. Since the PDOS actuators used in this work were localized, the effect of the control strategy was confined to the region directly downstream of the PDOS actuator.
Skip Nav Destination
Article navigation
June 2016
Research Article|
June 15 2016
Identification and mitigation of T-S waves using localized dynamic surface modification
Michael Amitay;
Michael Amitay
a)
Mechanical, Aerospace and Nuclear Engineering Department,
Rensselaer Polytechnic Institute
, Troy, New York 12180, USA
Search for other works by this author on:
Burak A. Tuna;
Burak A. Tuna
Mechanical, Aerospace and Nuclear Engineering Department,
Rensselaer Polytechnic Institute
, Troy, New York 12180, USA
Search for other works by this author on:
Haley Dell’Orso
Haley Dell’Orso
Mechanical, Aerospace and Nuclear Engineering Department,
Rensselaer Polytechnic Institute
, Troy, New York 12180, USA
Search for other works by this author on:
a)
Author to whom correspondence should be addressed. Electronic mail: amitam@rpi.edu
Physics of Fluids 28, 064103 (2016)
Article history
Received:
October 07 2015
Accepted:
May 27 2016
Citation
Michael Amitay, Burak A. Tuna, Haley Dell’Orso; Identification and mitigation of T-S waves using localized dynamic surface modification. Physics of Fluids 1 June 2016; 28 (6): 064103. https://doi.org/10.1063/1.4953844
Download citation file:
Sign in
Don't already have an account? Register
Sign In
You could not be signed in. Please check your credentials and make sure you have an active account and try again.
Pay-Per-View Access
$40.00
Citing articles via
On Oreology, the fracture and flow of “milk's favorite cookie®”
Crystal E. Owens, Max R. Fan (范瑞), et al.
Fluid–structure interaction on vibrating square prisms considering interference effects
Zengshun Chen (陈增顺), 陈增顺, et al.
Physics-informed neural networks for solving Reynolds-averaged Navier–Stokes equations
Hamidreza Eivazi, Mojtaba Tahani, et al.