抄録
This paper describes influence of combustion-chamber-pressure change on arcjet plasma source. To yield stable and effective combustion, arcjet plasma is applied to combustion chamber because arcjets readily produce stable high enthalpy flow. However, variation in combustion-chamber pressure sometimes disturbed arc discharge; rise in combustion chamber pressure increased discharge voltage and plenum chamber pressure of arcjet. Hence, the response of arc discharge to pressure variation of combustion chambers would destabilize both combustion and arc discharge. Hence, we evaluated influence of increase in combustion-chamber pressure on discharge voltage, and rate of sustaining arc discharge after increment in combustion chamber pressure. The tests showed that discharge voltage was increased by a factor of 2.5 due to pressure increment of 0.25 MPa at a rise time of 200 ms.
