Experimental study on the energy deposition of an ns-DBD plasma actuator and its effect on a laminar boundary layer

An experimental study aimed at the influence of different barrier materials on the energy deposition of nanosecond pulsed dielectric barrier discharge (ns-DBD) plasma actuator was carried out. Additionally, the direct effect of the discharge of an ns-DBD plasma actuator on a low velocity laminar boundary layer was investigated. Three barrier...

Deconvolution Filters for Dynamic Rocket Thrust Measurements

Every spacecraft carries small rocket engines called thrusters for the purpose of orbit and position corrections in space. A precise operation of the thrusters saves fuel and a lower fuel consumption can extend the service life of the spacecraft. Precise thrust levels can be better obtained by pulsed firing than by continuous firing of the...

The Effects of Pylon Blowing on Pusher Propeller Performance and Noise Emissions

Growing concerns about the environmental impact of aircraft operations and increasing fuel prices have led to the demand for more fuel-efficient aircraft. One of the technologies with the potential to offer a significant reduction in fuel burn is the open rotor engine. However, the noise emissions of such engines are higher than for turbofans,...

Experimental investigation of artificial boundary layer transition: A comparison of different tripping devices

Nowadays there is a wide variety of applications for forced transition. They are all based on introducing disturbances to the flow and increasing its momentum thickness. Forced transition or bypass transition as it is also called is used to manipulate the flow by setting the transition point in such a way that the required/better flow situation...