Pictures: Electrogasdynamic Wind Tunnel for Electrokinetic Propulsion Testing.
According to Prof. Roth the outcome of subsonic plasma aerodynamics could be aircraft propulsion from plasma acceleration on surfaces of wings and fuselage. Such a futuristic principle of propulsion was also envisioned by Prof. Rechenberg from the Institute of Bionics and Evolutiontechnique (see p. 12 in Bionics 2099 Visions and notes on plasma propulsion). Such an integral surface propulsion would be closer to bionic principles. Birds and insects use the whole wing for propulsion. In real world applications the principle of mechanical flapping wing could be simulated by "flapping" or vortex pumping the charged fluid. In extension to the work of Prof. Roth and other, the scientists from the Institute of Bionics propose the use of solitary wave motion to reduce electromagnetic loss and better mimic the natural principle of vortex thrusting.
Polyphase high voltage power supply operating with kilohertz frequencies at several kilo Volts are not available off-the-shelf. A company was specially ordered to develop a high voltage power supply providing 8 variable phases at RF voltages up to 10 kV peak to peak and a frequency range from 5 – 50 kHz. The total power output is 300 W.
The National Instruments S-Series Simultaneous Sampling Multifunctional Data Acquisition PC-Card NI PCI-6143 is used to digitize the analog 8 phase outputs of the high voltage power supply. For this purpose B. Goeksel developed the 8-channel scope software in LabView 7.1 (see pictures below).
Pictures: Multiphase High Voltage Power Supply and 8-Channel PC-Scope.
Pictures: Combined paraelectric-peristaltic plasma panel (0.50 mm flexible Teflon sheet, 0.07 mm tinned copper electrodes) fixed with 3M Kapton electrical tape.
Pictures: Polyphase plasma actuator (4 phases activated, 11 kHz, 2.66 kV rms) blows out the flame of a cigarette lighter (click on pictures to see movie).