Accession Number : AD0469203


Title :   RESISTANCE-HEATED THRUSTOR RESEARCH.


Descriptive Note : Final rept. 15 Jan 64-14 Apr 65,


Corporate Author : GIANNINI SCIENTIFIC CORP SANTA ANA CALIF


Personal Author(s) : Ducati,Adriano C


Report Date : Jul 1965


Pagination or Media Count : 161


Abstract : The analytical and experimental research program on three resistance-heated thrustors at power levels of 1, 6, and 30 KW is described. Hydrogen was used as the propellant for most of the experiments. Several tests with ammonia were made for comparative purposes. Although DC input power has been used almost exclusively, a few tests were conducted with AC power input. The 30 KW thrustor was the basic experimental model during the tests, and for this reason its final design optimization shows the best results. The 6 and 1 KW models still require further development to reach the same performance level as the larger unit. It is known, however, that technical difficulties increase with reduction of size. The energy lost through radiation has been found to be one of the major losses, so that during the initial part of the work particular emphasis was made toward their reduction. A description of the methods used, the difficulties encountered and the results obtained are reported. (Author)


Descriptors :   *ATTITUDE CONTROL SYSTEMS , HEATING ELEMENTS , CONTROL JETS , ELECTRICAL RESISTANCE , TUNGSTEN , ELECTRODES , HEAT TRANSFER , LAMINAR FLOW , THERMAL CONDUCTIVITY , THERMAL RADIATION , LIQUEFIED GASES , VAPORIZATION , FEASIBILITY STUDIES , EXHAUST NOZZLES , MODEL TESTS , PERFORMANCE(ENGINEERING) , ARC JET ENGINES , ELECTRIC PROPULSION


Distribution Statement : APPROVED FOR PUBLIC RELEASE