TY - JOUR
T1 - Computational 2D parameter study of suction and oscillatory blowing actuator with experimental validation
AU - Shimshi, Eilon
AU - Seifert, Avraham (“Avi”)
N1 - Publisher Copyright:
© 2022 Elsevier Masson SAS
PY - 2022/10
Y1 - 2022/10
N2 - Fluidic oscillators and ejectors were combined to create an effective flow control device, proved effective but have not been optimized yet. In the current study, mostly steady RANS simulations were used to optimize 11 geometric parameters of a generic-simplified suction and oscillatory blowing actuator (SaOB). Selected unsteady simulations and experiments validated the numerical optimization procedure findings. In the parameter optimization process, multiple input and output parameters are chosen to identify the strongest correlations between them. Non- or weakly- correlated parameters are eliminated from further study and others are combined to obtain a reduced set of correlated parameters. It was found that the Throat ratio (ejector to oscillator) parameter predicts the Entrainment ratio, while the cross-flow pressure gradient ratio can predict the ability of the SaOB actuator to produce effective oscillation. The optimized device performs significantly better than the starting point device. While the approach is appealing, open questions remain concerning the comparison of 2D simulations and the actual 3D geometry and compressibility effects.
AB - Fluidic oscillators and ejectors were combined to create an effective flow control device, proved effective but have not been optimized yet. In the current study, mostly steady RANS simulations were used to optimize 11 geometric parameters of a generic-simplified suction and oscillatory blowing actuator (SaOB). Selected unsteady simulations and experiments validated the numerical optimization procedure findings. In the parameter optimization process, multiple input and output parameters are chosen to identify the strongest correlations between them. Non- or weakly- correlated parameters are eliminated from further study and others are combined to obtain a reduced set of correlated parameters. It was found that the Throat ratio (ejector to oscillator) parameter predicts the Entrainment ratio, while the cross-flow pressure gradient ratio can predict the ability of the SaOB actuator to produce effective oscillation. The optimized device performs significantly better than the starting point device. While the approach is appealing, open questions remain concerning the comparison of 2D simulations and the actual 3D geometry and compressibility effects.
KW - Computational fluid dynamics
KW - Flow control
KW - Fluidic actuators
KW - Oscillatory blowing
KW - Parameter correlation study
UR - http://www.scopus.com/inward/record.url?scp=85137272166&partnerID=8YFLogxK
U2 - 10.1016/j.ast.2022.107813
DO - 10.1016/j.ast.2022.107813
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AN - SCOPUS:85137272166
SN - 1270-9638
VL - 129
JO - Aerospace Science and Technology
JF - Aerospace Science and Technology
M1 - 107813
ER -