Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 8 of 8 for “"Jet Mode"”.
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Numerical simulation of a single emitter colloid thruster in pure droplet cone-jet mode
… a colloid thruster operating in the single cone-jet pure droplet mode. Our numerical simulation models the cone-jet transition region of the colloid jet; starting from the needle up to the extractor grid, thus reproducing a typical electrospray experimental configuration.
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Development and characterization of an inertial electrostatic confinement thruster
… the development of an IEC thruster based on the jet mode of operation. Discharge characteristics of the IEC jet mode were studied. Current, thermal power, thermal efficiency and thrust measurements were obtained. As an addition, helicon plasma injection into the IEC was studied, and based on …
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Formation and extraction of a dense plasma jet from a helicon-plasma-injected inertial electrostatic confinement device
… has several pressure and grid-geometry dependent modes of operation for the confinement of plasma. Although the symmetric grid star-mode is the most often studied for its application to fusion, the asymmetric grid jet-mode has its own potential application for electric space propulsion. The …
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Experimental and numerical validation of ion extractor grids
… gas such as argon, HIIPER operates in a mode where a very sharp plasma beam forms and exits the system through the IEC's asymmetry, thus allowing the existence of a net non-zero momentum. Such an operating mode is called ""Jet-Mode"". However, it was demonstrated that the exiting plasma …
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3D-Printed, Internally Fed Electrospray Thruster
… well-known scaling law of electrospray in cone-jet mode. The thrust and specific impulse estimates showed that the device performance is comparable to state-of-the-art microfabricated internally fed electrospray thrusters.
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Studies on the physical structure, properties and operation of ionic liquid electrosprays in the pure-ion mode
Electrosprays operating in the pure-ion mode exhibit compelling characteristics for micropropulsion, such as the ability to achieve high specific impulses with high efficiency. Liquid metal and ionic liquid-based electrospray sources are the most well-established types that operate in this mode. …
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Development and validation of a thermodynamic model for predicting mode transitions in falling film flows over horizontal tubes
… inter-tube space, the flow can take three main modes, namely: droplet, jet, and sheet modes. The accurate prediction of the prevailing flow mode is very important for the design and operation of these heat and mass exchangers, because the main performance characteristics (e.g. transport …
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Comparative simulations of conceptual ion extractors for use in asymmetric inertial electrostatic confinement
Many deep space propulsion missions currently use ballistic trajectories to reach their destinations. To reduce the times of flight, electric or plasma based propulsion systems are used. While Hall Effect thrusters are the general standard for plasma propulsion, new technologies can enable shorter …