Topic
Arcjet rocket
About: Arcjet rocket is a research topic. Over the lifetime, 1121 publications have been published within this topic receiving 9687 citations. The topic is also known as: Arcjet.
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01 Jan 2012-Transactions of The Japan Society for Aeronautical and Space Sciences, Space Technology Japan
TL;DR: In this article, a 1-N class space propulsion thruster using SHP163 monopropellant and arc discharge assisted combustion is discussed, which has relatively low toxicity and reactivity to materials such as metal and polymers and can be stored in a liquid form due to its relatively low freezing point.
Abstract: This paper discusses a 1-N class space propulsion thruster using SHP163 monopropellant and arc discharge assisted combustion. SHP163 is a hydroxyl-ammonium nitrate (HAN)-based monopropellant, which has relatively low toxicity and reactivity to materials such as metal and polymers, and can be stored in a liquid form due to its relatively low freezing point. Arc discharge, supporting a SHP163 exothermic chemical reaction, is used as an alternative to conventional particulate catalysts. Part of the pressurant is used as working fluid for the arcjet. Tests using prototyped thrusters show that combustion started and was successfully sustained with the assistance of a 1-kW class arc discharge. Thrust chamber pressure measurements yielded a characteristic exhaust velocity efficiency of 90 % at a specific power of 2.8 MJ/kg.
1 citations
25 Sep 1997
TL;DR: A three-year, NASA/BMDO-sponsored experimental program to conduct performance and plume plasma property measurements on two Russian Stationary Plasma Thrusters (SPTs) has been completed as mentioned in this paper.
Abstract: A three-year, NASA/BMDO-sponsored experimental program to conduct performance and plume plasma property measurements on two Russian Stationary Plasma Thrusters (SPTs) has been completed. The program utilized experimental facilitates at the University of Michigan's Plasmadynamics and Electric Propulsion Laboratory (PEPL). The main features of the proposed effort were as follows: We Characterized Hall thruster [and arcjet] performance by measuring ion exhaust velocity with probes at various thruster conditions. Used a variety of probe diagnostics in the thruster plume to measure plasma properties and flow properties including T(sub e) and n(sub e), ion current density and ion energy distribution, and electric fields by mapping plasma potential. Used emission spectroscopy to identify species within the plume and to measure electron temperatures.
1 citations
TL;DR: In this article, an intermediate-voltage operation mode was newly found between the conventional lowvoltage and the highvoltage mode, where the electron density and the ionization features were locally enhanced in the upstream region of the nozzle.
Abstract: In the regime of low power DC arcjet, a research how to stabilize the operation modes was conducted in the Institute of Space and Astronautical Science (ISAS) using a 2-dimension-like DC arcjet for internal visualization, designated as ISAS-VAJ. As the results, an intermediate-voltage operation mode was newly found between the conventional low-voltage and the high-voltage mode. In the new intermediate-voltage mode, it was observed that the electron density and the ionization features were locally enhanced in the upstream region of the nozzle. It was also found that these localized features turned to be relaxed just after the formation, and the operation mode transferred to a high-voltage mode. Applying Kuriki model to this phenomenon, the operation mode and the transition were understood in view of the conditions for arc column formation. A proposal to stabilize the operation mode was made to be applied to ISAS-VAJ by adding a second-cathode in the upstream region of the nozzle. Initiating high voltage pulsed discharges on it, the operation mode was successfully transferred from a low-voltage to a stable high-voltage mode.
1 citations
01 Aug 1988
TL;DR: In this article, a 30 kWe arcjet PCU has been designed, built and tested, both with a solid state load and with a 30kWe thruster, and the measured efficiency was 94%, which can easily be increased to 95% by substitution of recently available semiconductors.
Abstract: : A 30 kWe arcjet PCU has been designed, built and tested, both with a solid state load and with a 30 kWe arcjet thruster. The arcjet PCU has accumulated over 40 hours full power or nearly full power operating time, and showed no sign of degradation. The measured efficiency was 94%, which can easily be increased to 95% by substitution of some recently available semiconductors. The stability of output current has been demonstrated while using current-mode, pulse-width modulation control. Keywords: Power conditioning, Arcjet, High efficiency, and Current-mode pulse-width modulation.
1 citations