Download or read book Fundamentals of Arcjet Thruster Thermophysics written by and published by . This book was released on 1995 with total page 113 pages. Available in PDF, EPUB and Kindle. Book excerpt: This final technical report summarizes the research carried out by our group concerned with arcjet plasma propulsion. Section 1 describes the nonequilibrium plasma model and a detailed formulation for kinetic nonequilibrium. Section II describes experimental measurements in which measurements of electron number density, electron temperature, ion speed ratio and gas velocity are carried out by advanced Langmuir probes. Section III outlines our research with a modified 1-2 kW class arcjet, where surface mounted Langmuir probes are used to investigate the constrictor and nozzle current attachment regions.
Download or read book Thermal Analysis and Thrust Performance of a Low Power Arcjet Thruster written by T. Yamada and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Investigation of Radiation and Regeneratively Cooled 5kW Thermal Arcjet Thruster written by Martin Riehle and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of 1 KW Hydrazine Arcjet 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: This final technical report summarizes the research carried out by our group concerned with the fundamentals of hydrazine 1 kW arcjet thrusters. Section 1 presents modeling analysis that predict the nonequilibrium plasmadynamic processes by solving the two-dimensional, axisymmetric, chemical nonequilibrium viscous flows including heat transfer to the anode con-divergent nozzle. Section II presents the coupling of cathode sheath potential models necessary to account for the total voltage operating at 10 A. Excellent agreement is predicted to match data for a 1 kW hadrazine arcjet. Section III presents experimental studies of the internal anode sheath layer by utilizing an array of 14 electrostatic micro-probes. Axial and azimuthal distributions of such plasma properties as the floating potential, anode sheath potential, wall current density, electron number density and electron temperature are reported for power/mass flow ratios ranging between 18 to 30 Mj/kg. Excellent agreement between the data and the numerical models (Sec I and II) is found.
Download or read book Development of a High Specific 1 5 to 5 KW Thermal Arcjet written by National Aeronautics and Space Adm Nasa and published by Independently Published. This book was released on 2018-12-31 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: A research and development project on the experimental study of a 1.5-5 kW thermal arcjet thruster was started in 1992 at the IRS. Two radiation cooled thrusters were designed, constructed, and adapted to the test facilities, one at each end of the intended power range. These thrusters are currently subjected to an intensive test program with main emphasis on the exploration of thruster performance and thruster behavior at high specific enthalpy and thus high specific impulse. Propelled by simulated hydrazine and ammonia, the thruster's electrode configuration such as constrictor diameter and cathode gap was varied in order to investigate their influence and to optimize these parameters. In addition, test runs with pure hydrogen were performed for both thrusters. Riehle, M. and Glocker, B. and Auweter-Kurtz, M. and Kurtz, H. NASA-CR-193133, NAS 1.26:193133, IRS-93-P7 NAGW-1736...
Download or read book High Specific Impulse Performance of a 100 KW Radiation Cooled Thermal Arcjet Thruster written by Thomas M. Golz and published by . This book was released on 1994 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arcjet Thruster Research and Technology Phase 1 written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-25 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The principal objective of this two phase program is to conduct the development research required to make the low power arcjet a flight ready technology. Many important results were obtained during Phase 1 to move closer to this objective. Fundamental analyses were performed of the arcjet nozzle, the gas kinetic reaction effects, the thermal environment, and the arc stabilizing vortex. These aided the conceptual understanding of the arcjet and guided design work. A hydrazine (N2H4) arcjet was designed that combined a flight qualified catalyst bed with a modular arcjet. Extensive testing was performed which demonstrated the feasibility of using this propellant in an arcjet for the first time. Startup techniques were developed, stability maintained, material compatibility tests conducted, and performance mapping tests performed. Specific impulse values from 400 to 730 seconds were produced with a non-optimized design. These levels are higher than were originally thought possible and proved that extremely high enthalpy values can be obtained with constricted arc technology. Erosion rate data are promising for lifetime extensions to meet flight application requirements. Power control unit (PCU) development was started with the design and fabrication of a laboratory high switching frequency supply. Valuable data were obtained on PCU operation and on the interaction with the dynamic arc. Phase 2 efforts presently underway are resolving key issues for multi-hundred hour lifetimes, are continuing to investigate arcjet/PCU interactions, and will demonstrate duty cycle N2H4 arcjet/PCU operation in a simulated flight mode for lifetimes consistent with initial applications. Unspecified Center NASA-CR-182106, NAS 1.26:182106 NAS3-24631
Download or read book Arcjet Thruster Research and Technology Phase 1 written by and published by . This book was released on 1987 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arcjet Thruster Research and Technology written by and published by . This book was released on 1988 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Testing of 30 KW Hydrogen Arcjet Thrusters written by Thomas W. Haag and published by . This book was released on 1993 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Documents Center Index written by University of Illinois at Urbana-Champaign. Engineering Documents Center and published by . This book was released on 1997 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arc jet Thrustor for Space Propulsion written by Lewis E. Wallner and published by . This book was released on 1965 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The arc-jet thrustor represents an engine for potential space applications requiring a specific impulse in the range from 1000 to 2000 seconds. As such it was originally thought that missions for the engine would fit somewhere between those suitable for the high thrust chemical and the very low thrustion propulsion systems. The considerable effort expended to develop the arc thrustor has resulted in operation in the power range from 1 to 200 kilowatts, at specific impulse levels between 1000 and 2000 seconds, and for continuous running as long as 500 hours with overall efficiency up to 55 percent. Progress has been made on many of the early operating problems such as electrode-erosion, nozzle-cooling, and propellant-feed systems. In addition, theories have been advanced to explain, at least partially, the electric-arc operation In substance then, the thermal arc-jet thrustor is now fairly well developed. Because of several factors unrelated to impulse and efficiency levels, however, the mission application of the arc thrustor is somewhat doubtful at the present time. These factors, for the larger arc-jet thrustor, include biological shielding, hardware availability, excessive electric generator weight, and reliability, for example.
Download or read book Journal of Thermophysics and Heat Transfer written by and published by . This book was released on 1999 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Arcjet Thruster Research and Technology written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-23 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design, analysis, and performance testing of an advanced lower power arcjet is described. A high impedance, vortex stabilized 1-kw class arcjet has been studied. A baseline research thruster has been built and endurance and performance tested. This advanced arcjet has demonstrated long lifetime characteristics, but lower than expected performance. Analysis of the specific design has identified modifications which should improve performance and maintain the long life time shown by the arcjet. Makel, Darby B. and Cann, Gordon L. Unspecified Center NASA-CR-180865, NAS 1.26:180865, RPT/BB0642 NAS3-24842...
Download or read book Overview of Arcjet Thruster Research at the University of Illinois written by Rodney L. Burton and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Power Hydrazine Arcjet Thruster Study written by H. L. Kurtz and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Medium Power Arcjet Thruster Experiments written by Bernd Glocker and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
