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- W2317553005 abstract "A propulsion system capable of geostationary positioning for high-altitude, longduration airships could provide enhanced telecommunication, weather observation, and surveillance operations. The design of such a system at these mid-level atmospheric pressures offers a unique challenge as the background density is too low for standard propeller devices, while being too high for most in-space thrusters. The inherent simplicity of the Pulsed Plasma Thruster (PPT), along with its ability to use ambient air as an in-situ propellant, results in a thruster uniquely suited for these airships. Coaxial PPTs with varying sized electrodes were tested at background pressures ranging between 10 and 40 Torr. The resulting specific thrust, defined as the impulse measured with a thrust stand normalized by the capacitor energy, was found to be proportional to the background pressure and discharge chamber volume, and inversely proportional to the capacitor energy. Current and voltage measurements suggest no difference to the electrical discharge between atmospheric and vacuum operation, while high-speed camera imaging shows the acceleration mechanism for atmospheric operation to be entirely electrothermal, compared to the hybrid thermal and magnetic acceleration at vacuum pressures. To demonstrate that the air-breathing PPT is a viable concept the device was launched on a high-altitude burst balloon to an altitude of 31.9 km." @default.
- W2317553005 created "2016-06-24" @default.
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- W2317553005 date "2014-07-28" @default.
- W2317553005 modified "2023-09-24" @default.
- W2317553005 title "Pulsed Plasma Thrusters for Atmospheric Operation" @default.
- W2317553005 cites W2043207716 @default.
- W2317553005 doi "https://doi.org/10.2514/6.2014-3403" @default.
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