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Flow control using the parabolized stability equations

Grant number: 16/25187-4
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): June 01, 2017
Effective date (End): March 31, 2019
Field of knowledge:Engineering - Aerospace Engineering - Aerodynamics
Acordo de Cooperação: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal Investigator:André Valdetaro Gomes Cavalieri
Grantee:Kenzo Sasaki
Host Institution: Divisão de Engenharia Aeronáutica (IEA). Instituto Tecnológico de Aeronáutica (ITA). Ministério da Defesa (Brasil). São José dos Campos , SP, Brazil


This project deals with the active, closed-loop control of flows, with the objective of reducing the fluctuations of the fluidic variables at a given objective position. It is made use of the parabolized stability equations in order to construct reduced-order models in the form of transfer functions which are then able to reproduce both the open-loop behaviour of the system, along with the effect of an actuator. Two classes of problems will be evaluated; Sheared flows, mixing layers and turbulent jets, which have an aeroacoustic appeal, given that the objective of the control law is related to the reduction of acoustic emissions to the far-field. The second type of problem corresponds to boundary layers, in two and three dimensions. For this case, the control has the main objective of postponing the transition to turbulence, maintaining the flow in a laminar condition and, therefore, leading to a reduction in the friction drag coefficient. The focus of this work lies on the definition of the control laws and modelling of the systems, whereas the implementation of the techniques in the respective non-linear systems, whether these are made via simulation or experiment, will be realized in a partnership with other research groups. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MORRA, PIERLUIGI; SASAKI, KENZO; HANI, ARDESHIR; CAVALIERI, ANDRE V. G.; HENNINGSON, DAN S.. A realizable data-driven approach to delay bypass transition with control theory. JOURNAL OF FLUID MECHANICS, v. 883, . (16/25187-4)
SASAKI, KENZO; MORRA, PIERLUIGI; CAVALIERI, ANDRE V. G.; HANI, ARDESHIR; HENNINGSON, DAN S.. On the role of actuation for the control of streaky structures in boundary layers. JOURNAL OF FLUID MECHANICS, v. 883, . (19/13393-7, 16/25187-4)
SASAKI, KENZO; CAVALIERI, ANDRE V. G.; JORDAN, PETER; SCHMIDT, OLIVER T.; COLONIUS, TIM; BRES, GUILLAUME A.. High-frequency wavepackets in turbulent jets. JOURNAL OF FLUID MECHANICS, v. 830, . (16/25187-4)
SASAKI, KENZO; TISSOT, GILLES; CAVALIERI, ANDRE V. G.; SILVESTRE, FLAVIO J.; JORDAN, PETER; BIAU, DAMIEN. Closed-loop control of a free shear flow: a framework using the parabolized stability equations. THEORETICAL AND COMPUTATIONAL FLUID DYNAMICS, v. 32, n. 6, p. 765-788, . (16/25187-4)
SASAKI, KENZO; VINUESA, RICARDO; CAVALIERI, ANDRE V. G.; SCHLATTER, PHILIPP; HENNINGSON, DAN S.. Transfer functions for flow predictions in wall-bounded turbulence. JOURNAL OF FLUID MECHANICS, v. 864, p. 708-745, . (16/25187-4)

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