Large-eddy simulation-based characterization of suction and oscillatory blowing fluidic actuator

Jeonglae Kim, Parviz Moin, Avraham Seifert

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Unsteady turbulent flows inside a suction and oscillatory blowing actuator are simulated and characterized to provide better physical understanding of the complex actuator flows. Large-eddy simulation based upon a novel unstructured-grid technique is used to accurately calculate turbulent flows inside the actuator operating in still air. Simulations are performed for three inlet pressure conditions. Results show good agreement with the corresponding experimental measurements. The actuator is characterized by parameters such as pressure ratio, outlet velocity profile, oscillation frequency, and suction-to-total flow rates. The large-eddy simulation-generated data are used to develop a reduced-order model applicable to integrated simulation of aerodynamic flow control as an unsteady boundary condition. Dynamic mode decompositionis employed to obtain a lower-order representation of streamwise velocity at the actuator outlets. The frequency-optimized characteristics of dynamic mode decomposition enables to compactly represent the oscillatory turbulent outflows. Using the sparsity-promoting algorithm, an optimal representation of the actuator outflows is systematically derived. Using only two distinct dynamic modes, the sparsity-promoting variant of the standard dynamic mode decomposition algorithm adequately describes unsteady velocity fields at the actuator outlets.

Original languageEnglish (US)
Pages (from-to)2566-2579
Number of pages14
JournalAIAA Journal
Volume55
Issue number8
DOIs
StatePublished - Jan 1 2017
Externally publishedYes

Fingerprint

Fluidics
Large eddy simulation
Blow molding
Actuators
Turbulent flow
Decomposition
Flow control
Aerodynamics
Flow rate
Boundary conditions
Air

ASJC Scopus subject areas

  • Aerospace Engineering

Cite this

Large-eddy simulation-based characterization of suction and oscillatory blowing fluidic actuator. / Kim, Jeonglae; Moin, Parviz; Seifert, Avraham.

In: AIAA Journal, Vol. 55, No. 8, 01.01.2017, p. 2566-2579.

Research output: Contribution to journalArticle

Kim, Jeonglae ; Moin, Parviz ; Seifert, Avraham. / Large-eddy simulation-based characterization of suction and oscillatory blowing fluidic actuator. In: AIAA Journal. 2017 ; Vol. 55, No. 8. pp. 2566-2579.
@article{6873ff2362364113a0776758362ba118,
title = "Large-eddy simulation-based characterization of suction and oscillatory blowing fluidic actuator",
abstract = "Unsteady turbulent flows inside a suction and oscillatory blowing actuator are simulated and characterized to provide better physical understanding of the complex actuator flows. Large-eddy simulation based upon a novel unstructured-grid technique is used to accurately calculate turbulent flows inside the actuator operating in still air. Simulations are performed for three inlet pressure conditions. Results show good agreement with the corresponding experimental measurements. The actuator is characterized by parameters such as pressure ratio, outlet velocity profile, oscillation frequency, and suction-to-total flow rates. The large-eddy simulation-generated data are used to develop a reduced-order model applicable to integrated simulation of aerodynamic flow control as an unsteady boundary condition. Dynamic mode decompositionis employed to obtain a lower-order representation of streamwise velocity at the actuator outlets. The frequency-optimized characteristics of dynamic mode decomposition enables to compactly represent the oscillatory turbulent outflows. Using the sparsity-promoting algorithm, an optimal representation of the actuator outflows is systematically derived. Using only two distinct dynamic modes, the sparsity-promoting variant of the standard dynamic mode decomposition algorithm adequately describes unsteady velocity fields at the actuator outlets.",
author = "Jeonglae Kim and Parviz Moin and Avraham Seifert",
year = "2017",
month = "1",
day = "1",
doi = "10.2514/1.J055445",
language = "English (US)",
volume = "55",
pages = "2566--2579",
journal = "AIAA Journal",
issn = "0001-1452",
publisher = "American Institute of Aeronautics and Astronautics Inc. (AIAA)",
number = "8",

}

TY - JOUR

T1 - Large-eddy simulation-based characterization of suction and oscillatory blowing fluidic actuator

AU - Kim, Jeonglae

AU - Moin, Parviz

AU - Seifert, Avraham

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Unsteady turbulent flows inside a suction and oscillatory blowing actuator are simulated and characterized to provide better physical understanding of the complex actuator flows. Large-eddy simulation based upon a novel unstructured-grid technique is used to accurately calculate turbulent flows inside the actuator operating in still air. Simulations are performed for three inlet pressure conditions. Results show good agreement with the corresponding experimental measurements. The actuator is characterized by parameters such as pressure ratio, outlet velocity profile, oscillation frequency, and suction-to-total flow rates. The large-eddy simulation-generated data are used to develop a reduced-order model applicable to integrated simulation of aerodynamic flow control as an unsteady boundary condition. Dynamic mode decompositionis employed to obtain a lower-order representation of streamwise velocity at the actuator outlets. The frequency-optimized characteristics of dynamic mode decomposition enables to compactly represent the oscillatory turbulent outflows. Using the sparsity-promoting algorithm, an optimal representation of the actuator outflows is systematically derived. Using only two distinct dynamic modes, the sparsity-promoting variant of the standard dynamic mode decomposition algorithm adequately describes unsteady velocity fields at the actuator outlets.

AB - Unsteady turbulent flows inside a suction and oscillatory blowing actuator are simulated and characterized to provide better physical understanding of the complex actuator flows. Large-eddy simulation based upon a novel unstructured-grid technique is used to accurately calculate turbulent flows inside the actuator operating in still air. Simulations are performed for three inlet pressure conditions. Results show good agreement with the corresponding experimental measurements. The actuator is characterized by parameters such as pressure ratio, outlet velocity profile, oscillation frequency, and suction-to-total flow rates. The large-eddy simulation-generated data are used to develop a reduced-order model applicable to integrated simulation of aerodynamic flow control as an unsteady boundary condition. Dynamic mode decompositionis employed to obtain a lower-order representation of streamwise velocity at the actuator outlets. The frequency-optimized characteristics of dynamic mode decomposition enables to compactly represent the oscillatory turbulent outflows. Using the sparsity-promoting algorithm, an optimal representation of the actuator outflows is systematically derived. Using only two distinct dynamic modes, the sparsity-promoting variant of the standard dynamic mode decomposition algorithm adequately describes unsteady velocity fields at the actuator outlets.

UR - http://www.scopus.com/inward/record.url?scp=85027275113&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85027275113&partnerID=8YFLogxK

U2 - 10.2514/1.J055445

DO - 10.2514/1.J055445

M3 - Article

AN - SCOPUS:85027275113

VL - 55

SP - 2566

EP - 2579

JO - AIAA Journal

JF - AIAA Journal

SN - 0001-1452

IS - 8

ER -