Synthetic jets have been an area of interest in the recent years with constantly increasing industrial demand. Application areas are widespread and a strong focus is put on boundary layer control as well as on mixing enhancement. A synthetic jet has been studied using physical experiments involving high-speed camera footage and smoke visualisation. Additionally, threedimensional transient numer...

Experimental investigation has been carried out towards understanding the complex fluid dynamics involved in the interaction of vortical structures with zero pressure gradient boundary layer. A laminar boundary layer is produced on the flat plate placed in the water flume and the synthetic jet actuator is deployed on top of the plate at a definite distance from the leading edge. The synthetic j...

The effect of the excitation frequency synthetic jet actuators on mean velocity issuing from an array circular orifices is investigated experimentally, focusing acoustic characteristics actuator’s cavity. Two cavity configurations are considered. In first configuration, jets generated by exciting a single, large having sixteen via piezoelectric elements. second volume configuration divided into...

An improved version of the membrane actuator has been designed and constructed based on our previous diaphragm actuator. It consists of ferromagnetic shape memory alloy composite (FSMA) diaphragm and an electromagnet system. The actuation mechanism of the membrane actuator is the hybrid mechanism that we proposed previously. The high momentum airflow will be produced by the oscillation of the c...

Synthetic jets have been identified and utilized widely in airflow control applications. These jets of air are usually created by the use of compressed air, or an electromechanically driven vibrating platform. All of these approaches produce desired results in airflow-control such as enhanced lift and increased maneuverability. Despite the results however, system weight, size, response time and...

Zdeněk Trávníček, František Maršík, Tomáš Vít, Pieter de Boer Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejškova 5, 182 00 Prague 8, Czech Republic Technical University of Liberec, Faculty of Mechanical Engineering, Dept. of Power Engineering Equipment, Hálkova 6, 461 17 Liberec 1, Czech Republic Technical University of Eindhoven, Dept. of Mech. Eng., Divison of...