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 Development of a High Specific 1 5 to 5 KW Thermal Arcjet written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-16 with total page 36 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. Unspecified Center NASA-CR-193133, NAS 1.26:193133, IRS-93-P7 NAGW-1736...
Download or read book High Specific Impulse Thermal Arc Jet Thrustor Technology Part Ii Performance of Hall Arc Jets with Lithium Propellant written by Gordon L. Cann and published by . This book was released on 1967 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this program is to develop efficient electric arcjet thrustors for high specific impulse and long life. Power levels between 10 and 50 kW, specific impulse between 1500 and 6500 seconds are sought with power input-to-thrust ratios less than 190 kW/lb for durations up to 100 hours. The approach combines analytical and experimental research to investigate and develop thrustors using lithium and other alkali metals as propellants. The present approach has relied predominantly on Hall current interactions with an applied magnetic field. Thrustors of this type have been designated ALPHA (Alkali Plasma Hall Accelerator). During the second phase of the program the following advances have been made. The effects of the testing environment upon the measured performance have been investigated. Two major modifications to the design of the engine have been made: (1) the cylindrical cathode has been replaced by a buffered cathode with separate propellant injection, thereby increasing the thrust per unit current, decreasing the cathode power loss per unit current, increasing the insulator lifetime, and helping to separate the ionization and acceleration processes; (2) the region of strong magnetic field has been extended downstream by placin g a second coil on the engine, reducing magnet power requirement by a factor of almost five. Thrust balance has been improved. A new feed system has been designed to provide continuous operation for periods over 100 hours at levels around 10 mg/sec. A theory has been developed for the operation of ALPHA. Calculations based on this theory indicate that significant improvements can be made over present performance. (Author).
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 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 High Specific Impulse Thermal Arc Jet Thrustor Technology written by G. L. Cann and published by . This book was released on 1967 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt: The MPD arcjet program at EOS is aimed at developing the technology of electric thrustors capable of performing efficiently (40-60% conversion of electrical power to beam power) for extended periods of time (up to 100 hours) in the specific impulse range of 1500-5000 seconds, at power levels of 10-100 kilowatts. The analytical results are presented for each of the significant mechanisms. Progress in the experimental portion of the program has included the following: The thrustor has been operated continuously for 100 hours with no significant electrode erosion; A novel gas-actuated feed system which had been designed during the previous reporting period was fabricated, tested and calibrated; Test runs were made using ammonia as propellant; Tests with a three-magnet configuration resulted in performance inferior to that obtained with the two-magnet thrustor.
Download or read book 30th AIAA ASME SAE ASEE Joint Propulsion Conference written by and published by . This book was released on 1994 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 968 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 Performance of Radiation cooled Magnetoplasmadynamic Arc Thrusters written by D. J. Connolly and published by . This book was released on 1969 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 984 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1990 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 31st AIAA ASME SAE ASEE Joint Propulsion Conference and Exhibit written by and published by . This book was released on 1995 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computational Fluid Dynamics 94 written by Siegfried Wagner and published by . This book was released on 1994 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume work consists of the proceedings, of the invited lectures and the special technological sessions of the Second European Computational Fluid Dynamics Conference, September 94, Stuttgart, Germany.
Download or read book 92 3835 92 3873 written by and published by . This book was released on 1992 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Note written by and published by . This book was released on 1965 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
