Development of Synthetic Jet Actuator Array for Vortex-Flow　Generation

摘要

One of the options to improve the aerodynamic performance of wind turbines, airplane wings or trucks is due to activecontrolling of fluid flow. The most appropriate implementation concept is the use of synthetic jet actuators (SJA). Thereare different types of these kind of fluid flow generators. However, all they have conjointly the basic elements:membrane with attached piezoelectric disk element and small cavity with an orifice. In the case of symmetriccomposition of SJA is it possible to develop simple space-saving array module. Each module has two orifice which canbe directed from or against each other in an angle. Thus the fluid jets are alternately generated. In a simple case themembrane is equipped on the side with one thin piezoelectric disk. The symmetrical attachment of a second one on theother side brings some advantages in the load performance or act as a sensor for structural health monitoring of thesystem. The positioning of at least two modules close to each other provides creation of crossing fluid jets, which finallyleads to the formation of vortex flow. For design and optimization of symmetric jet actuators an equivalent circuitrepresentation network model was used.