Flow control (fluid) (original) (raw)
Flow control is a major rapidly-evolving field of fluid dynamics. It implies a small change of a configuration serving an ideally large engineering benefit, like drag reduction, lift increase, mixing enhancement or noise reduction. This change may be accomplished by passive or active devices.Passive devices, like turbulators or roughness elements, are steady and require no energy by definition. Active control requires actuators that may be driven in a time-dependent manner and require energy. Examples are valves and plasma actuators. The actuation command may be pre-determined (open-loop control) or be dependent on sensors monitoring the flow state (closed-loop control).
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| dbo:abstract | Flow control is a major rapidly-evolving field of fluid dynamics. It implies a small change of a configuration serving an ideally large engineering benefit, like drag reduction, lift increase, mixing enhancement or noise reduction. This change may be accomplished by passive or active devices.Passive devices, like turbulators or roughness elements, are steady and require no energy by definition. Active control requires actuators that may be driven in a time-dependent manner and require energy. Examples are valves and plasma actuators. The actuation command may be pre-determined (open-loop control) or be dependent on sensors monitoring the flow state (closed-loop control). (en) Le contrôle des écoulements est un domaine de la mécanique des fluides qui étudie les possibilités d'action sur les écoulements dans le but de les améliorer relativement à divers objectifs, qu'il s'agisse d'écoulements libres ou d'écoulements au voisinage d'une paroi. Les gains portent généralement sur l'augmentation des performances, avec une réduction du bruit éventuellement, et la réduction de la consommation qui en découlent. Le contrôle peut porter sur l'ensemble de l'écoulement ou opérer en un point donné avec un effet dans le voisinage et sur l'évolution de l'écoulement. Les contrôles peuvent être constants, se produisant sans intervention et en toutes circonstances ou adaptatif, en fonction de paramètres observés au moyen de diverses techniques. (fr) |
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| rdfs:comment | Flow control is a major rapidly-evolving field of fluid dynamics. It implies a small change of a configuration serving an ideally large engineering benefit, like drag reduction, lift increase, mixing enhancement or noise reduction. This change may be accomplished by passive or active devices.Passive devices, like turbulators or roughness elements, are steady and require no energy by definition. Active control requires actuators that may be driven in a time-dependent manner and require energy. Examples are valves and plasma actuators. The actuation command may be pre-determined (open-loop control) or be dependent on sensors monitoring the flow state (closed-loop control). (en) Le contrôle des écoulements est un domaine de la mécanique des fluides qui étudie les possibilités d'action sur les écoulements dans le but de les améliorer relativement à divers objectifs, qu'il s'agisse d'écoulements libres ou d'écoulements au voisinage d'une paroi. Les gains portent généralement sur l'augmentation des performances, avec une réduction du bruit éventuellement, et la réduction de la consommation qui en découlent. (fr) |
| rdfs:label | Flow control (fluid) (en) Contrôle des écoulements (fr) |
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