The reduction of wind turbine blade loads is an important issue in the reduction of the costs of energy production. Reduction of the loads of a non-cyclic nature requires so-called smart rotor control, which involves the application of distributed actuators and sensors to provide fast and local changes in aerodynamic performance. This paper investigates the use of synthetic jets for smart rotor...

Spreading and decay rates of several synthetic jets are experimentally measured up to 70–100 diameters (d) away from the orifice. It is found that, consistent with previous studies, after 10d–15d from the nozzle a synthetic jet displays a self-similar velocity profile together with enhanced spreading and decay behaviors than a continuous jet. However, this enhancement does not persist throughou...

In the present investigation, a novel focusing technique is proposed and demonstrated to enhance strength of synthetic jet array (SJ array). Here, for same geometric operating parameters, SJ achieved by providing non-linear phase delay (∅) between actuators. An open-source software, OpenFOAM, used study influence Strouhal number (St=0.028, 0.086, 0.13) ∅ s (range: 0°−180°) on behavior fixed Rey...

The use of a synthetic jet as the flow control technique to modulate turbulent incompressible round was explored and assessed by numerical simulations. response characterised in terms statistics acoustic far-field. A quasi-Direct Numerical Simulation (qDNS) strategy used predict effects. Ffowcs-Williams Hawkings (FWH) analogy employed compute far-field response. An amplification effect instabil...

We perform large-eddy simulation of turbulent flow separation over an airfoil and evaluate the effectiveness of synthetic jets as a separation control technique. The flow configuration consists of flow over an NACA 0015 airfoil at Reynolds number of 896,000 based on the airfoil chord length and freestream velocity. A small slot across the entire span connected to a cavity inside the airfoil is ...