Development of a liquid-fed water resistojetA concept for a forced-flow once-through water vaporizer for application to resistojet thrusters was evaluated as an element of a laboratory model thruster and tested to investigate its operating characteristics. The vaporizer design concept employs flow swirling to attach the liquid flow to the boiler chamber wall, providing for separation of the two liquid phases. This vaporizer was modified with a nozzle and a centrally-located heater to facilitatite vaporization, superheating, and expansion of the propellant, allowing it to function as a resistojet. Performance was measured at thrust levels ranging from 170 to 360 mN and at power levels ranging from 443 to 192 W. Maximum measured specific impulse was 192 sec.
Document ID
19880061535
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Morren, W. Earl (NASA Lewis Research Center Cleveland, OH, United States)
Stone, James R. (NASA Lewis Research Center Cleveland, OH, United States)