Download or read book Solid Propellant Pulsed Plasma Thrusters written by Gianni Pellegrini and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Study of a Dual Stage Solid Propellant Pulsed Plasma Thruster written by Clémence Royer and published by . This book was released on 2018 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Solid Propellant Pulsed Plasma Micro thruster Studies written by William J. Guman and published by . This book was released on 1968 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Characterization of Electric Solid Propellant Pulsed Microthrusters written by Matthew Scott Glascock and published by . This book was released on 2016 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Electric solid propellants are an attractive option for space propulsion because they are ignited by applied electric power only. In this work, the behavior of pulsed microthruster devices utilizing such a material is investigated. These devices are similar in function and operation to the pulsed plasma thruster, which typically uses Teflon as propellant. A Faraday probe, Langmuir triple probe, residual gas analyzer, pendulum thrust stand and high speed camera are utilized as diagnostic devices. These thrusters are made in batches, of which a few devices were tested experimentally in vacuum environments. Results indicate a plume electron temperature of about 1.7 eV, with an electron density between 1011 and 1014 cm−3. According to thermal equilibrium and adiabatic expansion calculations, these relatively hot electrons are mixed with ~2000 K neutral and ion species, forming a non-equilibrium gas. From time-of-flight analysis, this gas mixture plume has an effective velocity of 1500-1650 m/s on centerline. The ablated mass of this plume is 215 [mu]g on average, of which an estimated 0.3% is ionized species while 45+̲11% is ablated at negligible relative speed. This late-time ablation occurs on a time scale three times that of the 0.5 ms pulse discharge, and does not contribute to the measured 0.21 mN-s impulse per pulse. Similar values have previously been measured in pulsed plasma thrusters. These observations indicate the electric solid propellant material in this configuration behaves similar to Teflon in an electrothermal pulsed plasma thruster"--Abstract, page iv.

Download or read book A Performance Comparison of Pulsed Plasma Thruster Electrode Configurations written by and published by . This book was released on 1997 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Expanding the Capabilities of the Pulsed Plasma Thruster for In space and Atmospheric Operation written by Ian Kronheim Johnson and published by . This book was released on 2015 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of all in-space propulsion systems to date, the Pulsed Plasma Thruster (PPT) is unique in its simplicity and wide range of operational parameters. This study examined multiple uses of the thruster for in-space and atmospheric propulsion, as well as the creation of a CubeSat satellite and atmospheric airship as test beds for the thruster. The PPT was tested as a solid-propellant feed source for the High Power Helicon Thruster, a compact plasma source capable of generating order of magnitude higher plasma densities than comparable power level systems. Replacing the gaseous feed system reduced the thruster size and complexity, as well as allowing for extremely discrete discharges, minimizing the influence of wall effects. Teflon (C2F4) has been the traditional propellant for PPTs due to a high exhaust velocity and ability to ablate without surface modification over long durations. A number of alternative propellants, including minerals and metallics commonly found on asteroids, were tested for use with the PPT. Compounds with significant fractions of sulfur showed the highest performance increase, with specific thrusts double that of Teflon. A PPT with sulfur propellant designed for CubeSat operation, as well as the subsystems necessary for autonomous operation, was built and tested in the laboratory. The PPT was modified for use at atmospheric pressures where the impulse was well defined as a function of the discharge chamber volume, capacitor energy, and background pressure. To demonstrate that the air-breathing PPT was a viable concept the device was launched on two atmospheric balloon flights.

Download or read book Pulsed Electric Microthrusters With Solid Propellant for Microsats and Nanosats written by and published by . This book was released on 2002 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes progress, in experimental development, plasma diagnostics, and modeling, in advanced pulsed plasma thrusters (PPT) for application to formation-flying satellite constellations such as TechSat21. The research concentrated on coaxial Teflon PPTs, predominantly of the electrothermal (high thrust) type, with an average power of 100 watts. During this effort, performance advances were made both in the thruster design and in the pulsed circuitry driving the discharge, aided by increased understanding derived from a two-fluid model. The results of this research led to the development, under separate contract to CU Aerospace, of a PPT flight test model (PPT-8) which was tested at the AFRL Electric Propulsion Laboratory.

Download or read book Micropropulsion for Small Spacecraft written by Michael Matthew Micci and published by AIAA. This book was released on 2000 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Development of a Pulsed Plasma Thruster as a Solid Fuel Plasma Source for a High Power Helicon written by Ian Kronheim Johnson and published by . This book was released on 2011 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pulsed Plasma Thruster Using Water Propellant written by Carsten A. Scharlemann and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Performance of Gas fed Pulsed Plasma Thrusters Using Water Vapor Propellant written by John K. Ziemer and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fundamentals of Electric Propulsion written by Dan M. Goebel and published by John Wiley & Sons. This book was released on 2008-12-22 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout most of the twentieth century, electric propulsion was considered the technology of the future. Now, the future has arrived. This important new book explains the fundamentals of electric propulsion for spacecraft and describes in detail the physics and characteristics of the two major electric thrusters in use today, ion and Hall thrusters. The authors provide an introduction to plasma physics in order to allow readers to understand the models and derivations used in determining electric thruster performance. They then go on to present detailed explanations of: Thruster principles Ion thruster plasma generators and accelerator grids Hollow cathodes Hall thrusters Ion and Hall thruster plumes Flight ion and Hall thrusters Based largely on research and development performed at the Jet Propulsion Laboratory (JPL) and complemented with scores of tables, figures, homework problems, and references, Fundamentals of Electric Propulsion: Ion and Hall Thrusters is an indispensable textbook for advanced undergraduate and graduate students who are preparing to enter the aerospace industry. It also serves as an equally valuable resource for professional engineers already at work in the field.

Download or read book Transport Processes in Pulsed Plasma Thrusters written by and published by . This book was released on 1997 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The simplicity of the pulsed plasma microthruster (PPT) allowed its selection for space flight application, even with low efficiency relative to other concepts. Improvements to PPT thrust efficiency and specific impulse represent today's challenges for research and development. Self consistent modeling of PPT behavior requires a description of the flow composition as it changes from complex molecular forms to highly ionized, constituent atoms. Heat flux from the plasma discharge to the solid propellant, (traditionally, Teflon), depends on transport coefficients for electrical and thermal conductivity in the partially ionized flow. Numerical simulations now use an existing, single temperature equation of state for Teflon (from the SESAME tables) along with classical transport formulas based on Coulomb collisions. The principal effort under the present grant has been to develop a two-temperature, LTE model for Teflon in the regime of interest for PPTs. This model includes 25 species (atoms, molecules, ions and electronics) and allows separates heavy-particle and electron temperatures. An idealized analysis, limited to one-dimensional, quasi-steady MHD flow, but incorporating resistive heating and thermal diffusion, has also been developed and provides useful guidance on PPT operation and propellant behavior.

Download or read book The Effect of Diverging Nozzle Addition on the Operational Reliability of Solid Propellant Micro Pulsed Plasma Thruster written by 劉邁丹 and published by . This book was released on 2019 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Physics of Electric Propulsion written by Robert G. Jahn and published by Courier Corporation. This book was released on 2006-05-26 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Literaturangaben. - Originally published: New York, NY : McGraw-Hill, 1968

Download or read book Performance Study on Liquid Propellant Pulsed Plasma Thruster written by Akira Kakami and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pulsed Plasma Technology in Microthrusters written by and published by . This book was released on 1968 with total page 199 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report describes the pertinent results of the studies carried out in advancing solid propellant pulsed plasma microthruster system technology in the thrust range from below 1 micropound up to roughly 200 micropounds and encompassing the (system) specific impulse range up to 2400 seconds. Thruster nozzles have been operated up to 3800 hours at the 50 micropound thrust level. Complete thruster systems have been operated up to 630 hours at the 140 micropound thrust level (317 lb-sec of total impulse). A thrust stand capable of accurately and rapidly measuring thrust of a microthruster was delivered. Guidelines for including a solid propellant pulsed plasma microthruster system in application studies are included.