2017
DOI: 10.1017/jfm.2017.273
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Laminar free shear layer modification using localized periodic heating

Abstract: The application of local periodic heating for controlling a spatially developing shear layer downstream of a finite-thickness splitter plate is examined by numerically solving the two-dimensional Navier-Stokes equations. At the trailing edge of the plate, oscillatory heat flux boundary condition is prescribed as the thermal forcing input to the shear layer. The thermal forcing introduces low level of oscillatory surface vorticity flux and baroclinic vorticity at the actuation frequency in the vicinity of the t… Show more

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Cited by 15 publications
(6 citation statements)
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“…This magnitude is representative of those used in thermally actuated flow control studies (Corke et al 2010;Sinha et al 2012;Akins et al 2015;Yeh et al 2015). For this thermal actuator, Yeh et al (2017b) have investigated its control mechanism and flow control capability in free shear layers. The thermal input from the actuator translates to vortical perturbations in the forms of oscillatory surface vorticity flux and baroclinic torque.…”
Section: Actuator Modelmentioning
confidence: 99%
“…This magnitude is representative of those used in thermally actuated flow control studies (Corke et al 2010;Sinha et al 2012;Akins et al 2015;Yeh et al 2015). For this thermal actuator, Yeh et al (2017b) have investigated its control mechanism and flow control capability in free shear layers. The thermal input from the actuator translates to vortical perturbations in the forms of oscillatory surface vorticity flux and baroclinic torque.…”
Section: Actuator Modelmentioning
confidence: 99%
“…The domain is fixed so that βˆ’15 ≀ x/w ≀ 400 and βˆ’200 ≀ y/w ≀ 200, where x and y are the stream-wise and cross-stream directions, respectively. Additional simulation and validation details can be found in [53].…”
Section: Mixing Layermentioning
confidence: 99%
“…In practical scenarios, the actuator can only be placed on the surface of aerodynamic body. We also note that the chosen actuator can only introduce a specific form of forcing input [61], such as momentum [22,62] or thermal [24,30,[63][64][65]. Therefore, we design the input matrix B such that the forcing can only be introduced from the surface of the airfoil with specific forcing inputs.…”
Section: Windowed Analysismentioning
confidence: 99%