Synthetic jet actuators are promising Active Flow Control (AFC) devices which could lead to saving millions of dollars in fuel consumption each year. The Bimorph piezoelectric actuators are an attractive alternative to other type of actuators as active diaphragms and are the focus of this work. Among the properties of a Bimorph actuator, a number of geometrical and physical external factors may...

This study is inspired by the observation and hypothesis that the spreading and decay behaviors of a jet directly depend on the momentum-mixing mechanism between the jet and surrounding fluid. This mixing behavior is dictated by the kinematic viscosity ν for a laminar jet, which can be dramatically enhanced in a turbulent flow and is represented by the eddy viscosity ε. Similarly, pulsation in ...

Long-distance air travel requires fuel with a high specific energy and density. There are no viable alternatives to carbon-based fuels. Synthetic jet from the Fischer-Tropsch (FT) process, employing sustainable feedstocks, is potential low-carbon alternative. A number of synthetic production routes have been developed, using range feedstocks including biomass, waste, hydrogen captured carbon di...

The performance of systems involving a body in a fluid flow can be enhanced by manipulation of the body shape through flow control. Active flow control, the focus of this work, is achieved by energizing low-momentum regions at the wall by tangential blowing using air. One mechanism for blowing air into this region is through synthetic jets. They are devices that push air out from a fixed orific...

[1] From the physics of radar imaging of ocean surface processes a theoretical model for the radar imaging of an ocean jet was derived. The theoretical model predicts that the jet current structure, sechh, constitutes a determining factor for the radar image. The modeled image intensity depends on the axial velocity, decreasing as x 1 along the jet axis, and is sensitive to the wind direction w...