Manipulation of the aerodynamic behavior of the DrivAer model using dimple patterns

Ballerstein, Nils; Horst, Peter

doi:10.1016/j.jweia.2022.105216

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…A wide spectrum of flow control techniques has been effectively employed in both academic and industrial configurations to mitigate flow separation [11]. Passive control devices, such as vortex generators [12,13], dimples [14,15], flaps [16], and transverse grooves [17], have demonstrated efficacy in controlling separation across various flow configurations. A recent study by Viswanathan [18] conducted a parametric analysis to investigate the impact of different vortex generators on car drag reduction under varying yaw angles.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Flow Separation Control Using Hybrid Passive and Active Actuators in a Matrix Configuration

Li,

Zhang

2024

Aerospace

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Efficient control of flow separation holds significant economic promise. This study investigates flow separation mitigation using an experimental platform featuring a combination of passive and active actuators arranged in a matrix configuration. The platform consists of 5 × 6 hybrid actuator units, each integrating a height-adjustable vortex generator and a micro-jet actuator. Inspired by the distributed pattern of V-shaped scales on shark skin, these actuator units are strategically deployed in a matrix configuration to reduce flow separation on a backward-facing ramp. Distributed pressure taps encircling the hybrid actuators monitor the flow state. Parametric analyses examine the effect of different control strategies. By adopting appropriate passive and active actuation patterns, effective pressure recovery on the ramp surface can be achieved. The most significant flow control outcome occurs when the actuators operate under combined active and passive excitation, harnessing the benefits of both control strategies. Particle image velocimetry (PIV) results confirm a notable reduction in flow separation under the best-controlled case. These findings suggest a promising future for flow control devices employing combined passive and active actuation in matrix-like configurations.

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