Accession Number : AD0430482


Title :   GENERAL RESEARCH. ELECTRON BOMBARDMENT HEATING FOR ELECTROTHERMAL PROPULSION,


Corporate Author : AEROSPACE CORP EL SEGUNDO CALIF


Personal Author(s) : Starner,K E ; Grabowsky,W R


Report Date : 03 Feb 1964


Pagination or Media Count : 49


Abstract : Electrothermal propulsion devices developed to date can be grouped into two classifications, namely, the arc jet and the electrical resistance heated heat transfer propulsor. The former type features Joule heating directly in the gas; in the latter, a resistance heated refractory metal heat exchanger transfers heat to the propellant by conduction. This report introduces the technique of high-voltage, low-current electron bombardment heating for the heat transfer thrustor. The electron bombardment approach has inherent advatages for space applications and allows lifting of several restrictions found with resistance heating methods. A tantalum, electron bombardment type gas heater was built to research thrustor operation. Steady-state gas temperatures to 2700K were produced with argon at a voltage-to-current ratio greater than 50. The device functioned successfully for a total operating time of approximately 50 hours. (Author)


Descriptors :   *ELECTRIC PROPULSION , ELECTRON IRRADIATION , SPACE PROPULSION , HEATING , HEAT TRANSFER , ARGON , HEAT EXCHANGERS , SUPERSONIC NOZZLES , SPECIFIC IMPULSE , REFRACTORY MATERIALS , HEATERS , ARC JET ENGINES , SPACECRAFT


Distribution Statement : APPROVED FOR PUBLIC RELEASE