Although the usual mechanic explanation of ion wind momentum is correct, it does not allow for a perfect understanding of the physical origin of the force that acts …
Asymmetrical Capacitors for Propulsion
Although the usual mechanic explanation of ion wind momentum is correct, it does not allow for a perfect understanding of the physical origin of the force that acts …
force on the capacitor for the case of ballistic ionic wind and drift of carriers across the capacitor''s gap between elec-trodes. In Section 5, we present a detailed thermodynamic …
Modeling of an improved positive corona thruster and …
in nitrogen gas, using two different asymmetric capacitor geometries. This work represents an improvement over previous work in order to accomplish higher ion wind velocities as well as stronger electrostatic propulsion forces on all the involved electrodes. In our model, the used positive ion source is a small
AC/Se composite cathode for asymmetric Li-ion capacitors
The asymmetric capacitors are one of the energy storage systems that provide high energy density and high power density. However, there are some limitations which impede the development of asymmetric capacitors. In this context, we designed a new type of lithium-selenium asymmetric capacitor (LSEC) that has both the capacitive …
Asymmetrical capacitor: experiments and modeling …
A visualization technique of the corona wind is presented for a commonly used configuration (asymmetric capacitor) in electrohydrodynamic (EHD) lifters which employ the wind momentum for propulsion. The technique …
Calculation and measurement of a neutral air flow velocity …
This type of transport picture is more accurate (than ballistic ionic wind) for a capacitor whose gap contains air." 3 Further Bahder gives a macroscopic thermodynamic analysis of the effect stating: "Biefeld-Brown force, generated on an asymmetric capacitor, can be described by the thermodynamics of a fluid dielectric in an external ...
On the influence that the ground electrode diameter has in the ...
Journal Article: On the influence that the ground electrode diameter has in the propulsion efficiency of an asymmetric capacitor in nitrogen gas On the ... can generate a thrust per unit electrode length transmitted to the gas of up to 0.35 N/m and is also able to induce an ion wind top velocity in the range of 8-9 m/s in air.
[physics/0211001] Force on an Asymmetric Capacitor
The order of magnitude of the net force on the asymmetric capacitor is estimated assuming two different mechanisms of charge conduction between its electrodes: ballistic ionic wind and ionic drift. The calculations indicate that ionic wind is at least three orders of magnitude too small to explain the magnitude of the observed force on the ...
A visualization technique of the corona wind is presented for a commonly used configuration (asymmetric capacitor) in electrohydrodynamic (EHD) lifters which …
Analysis of the Efficiency of the Electrohydrodynamic …
In an asymmetrical capacitor is built on a wing section with one of the electrodes placed on the leading edge. With a handmade wind tunnel and a rather elementary instrumentation, the drag coefficient …
(PDF) On the nature of the propulsive force of asymmetric capacitors …
On the nature of the propulsive force of asymmetric capacitors in the atmosphere. Mario Pinheiro. 2011. See Full PDF Download PDF. See Full PDF Download PDF.
Asymmetrical Capacitor Thrusters: the Biefeld-Brown Effect
Back in the 1920s, a young man named Thomas Townsend Brown discovered that if he charged a capacitor with high voltage direct current, the capacitor would exhibit thrust in the direction of the + positive electrode. Off and on for the rest of his life (he died in 1985) he worked on these devices, trying to make a practical propulsion device using this principle.
