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 Characterization of a Green Electric Solid Propellant for Electric Propulsion written by Matthew Scott Glascock and published by . This book was released on 2019 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization of an Exploding Micro wire Pulsed Plasma Thruster written by Diego Mejia Montano and published by . This book was released on 2019 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pulsed Plasma Thrusters typically live in the low-range efficiency realm compared to other types of electric propulsion thrusters. In an attempt to explore if any added benefits could be gained from experimenting with a new propellant type, additional physics had to be incorporated into the classical RLC model approach. A study into modeling how a micro-wire propellant would react when subjected to energy deposition via current-driven heating was undertaken. Once a first-order estimate, verified with computational estimates, was obtained then the classical RLC series circuit model could be used to compare and validate the results obtained from experimentation. It was found that while the proposed propellant type is feasible, it produced performance differences that could not be explained solely by the classical model and a more exhaustive investigation into various phenomena will have to be pursued.
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 41 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 Recent Advancements in Green Propulsion written by Rachid Amrousse and published by Springer Nature. This book was released on with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Solid propellant microthrusters characterization and aplication for the station keeping of small satellites written by Gustavo Adolfo Ardila Rodríguez and published by . This book was released on 2003 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance of Two Subliming solid propellant Thrustor Systems for Attitude Control of Spacecraft written by Frank D. Berkopec and published by . This book was released on 1967 with total page 28 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.
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 Microengineering Aerospace Systems written by Henry Helvajian and published by AIAA. This book was released on 1999 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microengineering Aerospace Systems is a textbook tutorial encompassing MEMS (micro-electromechanical systems), nanoelectronics, packaging, processing, and materials characterization for developing miniaturized smart instruments for aerospace systems (i.e., ASIM application-specific integrated microinstrument), satellites, and satellite subsystems. Third in a series of Aerospace Press publications covering this rapidly advancing technology, this work presents fundamental aspects of the technology and specific aerospace systems applications through worked examples.
Download or read book Fundamentals of Electric Propulsion written by Dan M. Goebel and published by John Wiley & Sons. This book was released on 2023-10-25 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fundamentals of Electric Propulsion Understand the fundamental basis of spaceflight with this cutting-edge guide As spacecraft engineering continues to advance, so too do the propulsion methods by which human beings can seek out the stars. Ion thrusters and Hall thrusters have been the subject of considerable innovation in recent years, and spacecraft propulsion has never been more efficient. For professionals within and adjacent to spacecraft engineering, this is critical knowledge that can alter the future of space flight. Fundamentals of Electric Propulsion offers a thorough grounding in electric propulsion for spacecraft, particularly the features and mechanisms underlying Ion and Hall thrusters. Updated in the light of rapidly expanding knowledge, the second edition of this essential guide detailed coverage of thruster principles, plasma physics, and more. It reflects the historic output of the legendary Jet Propulsion Laboratory and promises to continue as a must-own volume for spacecraft engineering professionals. Readers of the second edition of Fundamentals of Electric Propulsion readers will also find: Extensive updates to chapters covering hollow cathodes and Hall thrusters, based on vigorous recent research New sections covering magnetic shielding, cathode plume instabilities, and more Figures and homework problems in each chapter to facilitate learning and retention Fundamentals of Electric Propulsion is an essential work for spacecraft engineers and researchers working in spacecraft propulsion and related fields, as well as graduate students in electric propulsion, aerospace science, and space science courses.
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 Numerical Analysis of the Effect of Propellant Material Properties on Pulsed Plasma Thruster Performance written by Ronald Lynn Corey and published by . This book was released on 2000 with total page 102 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 Performance Evaluation of the SPT 140 written by and published by . This book was released on 1997 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Characterization of Simulated Regoliths and Space Debris to Investigate the In situ Resource Utilization Capabilities of a Pulsed Plasma Thruster System written by Michael Siegel Wennerstrom and published by . This book was released on 2017 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: A coaxial pulsed plasma thruster operating at 18 Joules per pulse was discharged over lunar regolith simulant, silica powder, powdered aluminum, and solid Polytetrafluoroethylene to evaluate their potential as minimally refined in-situ propellant resources on other planets or moons for electric propulsion. All the propellants ablated and their plumes were examined using high-speed imaging, spectroscopy, and a double Langmuir probe. Silica produced a greater spectral intensity than lunar regolith. Imaging revealed that micron sized radiating particles are ejected from the anode, cathode, and propellant surfaces with speeds of up to 60 m/s. The double Langmuir probe revealed that in-situ propellants may produce peak charge densities similar to PTFE. Slower populations of charged particles were observed after the initial discharge only in the powdered propellants. The probe also revealed a lower bound to the plasma exit velocity of 6.3 km/s for aluminum, 19.3 km/s for lunar simulant, 17.8 km/s for silicon dioxide, and 20.39 km/s for PTFE.
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:
