Performance Modeling of a Coaxial Radio-Frequency Gas-Discharge Microthruster

Alexeenko, Alina; Hrbud, Ivana

doi:10.2514/1.34036

Cited by 15 publications

(8 citation statements)

References 26 publications

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“…Both types of power consumption increase as a function of pressure and voltage as expected from earlier studies. 21,22 It is of note that the P f increases with applied potential much faster than P abs . The total absorbed power increases in a near linear fashion above potentials of approximately 75 V at which the discharges transition and will be discussed in more detail below.…”

Section: Plasma-neutral Heat Transfer Effectsmentioning

confidence: 99%

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Plasma-Neutral Heat Transfer in Coaxial RF Argon Discharges

Alexeenko

Hrbud

2008

44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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Section: Plasma-neutral Heat Transfer Effectsmentioning

confidence: 99%

“…Our previous work [21][22][23] investigated the effects of pressure and frequency on performance of a 50W RFCCD microthruster. This was done at a constant applied potential and inner radius corresponding to conditions similar to that in the experiments.…”

Section: Introductionmentioning

confidence: 99%

Plasma-Neutral Heat Transfer in Coaxial RF Argon Discharges

Alexeenko

Hrbud

2008

44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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“…Each of these categories deviate from the baseline design in a related fashion. The baseline nozzle design was based on an actual experimental nozzle used with the RF plasma thruster at Purdue 11,12 and consists of a converging conical nozzle with a sharp orifice. A schematic of the baseline nozzle and flowfields for the are shown in Figure 1.…”

Section: Micronozzle Designmentioning

confidence: 99%

“…The baseline nozzle geometry studied here correspond to the RF plasma thruster studied experimentally. 11,12 The main goal of this investigation is to develop a more efficient micronozzle using DSMC simulations.…”

mentioning

confidence: 99%

Application of the DSMC Method for Design of a Coaxial Microthruster Nozzle

Alexeenko¹

2008

44th AIAA/ASME/SAE/ASEE Joint Propulsion Conference &Amp;amp; Exhibit

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The Direct Simulation Monte Carlo (DSMC) method is used to numerically simulate and design a micronozzle with improved performance. Thrust calculations using the DSMC method demonstrate that the coaxial micronozzles can achieve milli-Newton thrust levels with specific impulses on the order of 45 s using argon in a cold gas expansion. Improved micronozzle designs of coaxial microthrusters are also proposed. Coaxial micronozzles utilizing center-body geometries to exploit pressure thrust show about 140% increase in specific impulse at low Reynolds numbers compared to a traditional converging nozzle.

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“…Radio Frequency Capacitively Coupled Discharges (RFCCD) have been investigated for use in microthrusters onboard microspacecraft, 1 where severe constraints are placed on propulsion system size and power consumption. Various material processing applications include RF sputtering for thin film deposition, directional surface etching and plasma cleaning.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Power Transmission Efficiency in a RF Plasma

Ashok

Alexeenko

2009

47th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

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Capacitively coupled radio frequency discharges are used in a variety of applications in which the power transmission efficiency of the discharge is an important performance parameter. While previous research addressed the discharge properties and discharge modeling, little analysis has been done on the dependence of the power transmission efficiency on main discharge paremeters such as applied voltage, operating frequency and pressure. To investigate the effects of a dual frequency waveform on the power transmission efficiency, Particle-InCell/Monte-Carlo Collison (PIC/MCC) methods are used to simulate RF co-axial plasma discharge. Plasma characteristics are studied for a range of operating pressures and radii, as electrode voltages were varied between 0, 100 and 250V. The investigation concludes that the addition of a RF power source to the outer electrode increase power transmission efficiency by about 100%. Power transmission efficiency increases with a decrease in radius and an increase in pressure, in general. Low-frequency high-voltage power source combination is found to generate a more efficient discharge than a high-frequency high-voltage power source.

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Performance Modeling of a Coaxial Radio-Frequency Gas-Discharge Microthruster

Cited by 15 publications

References 26 publications

Plasma-Neutral Heat Transfer in Coaxial RF Argon Discharges

Plasma-Neutral Heat Transfer in Coaxial RF Argon Discharges

Application of the DSMC Method for Design of a Coaxial Microthruster Nozzle

Numerical Investigation of Power Transmission Efficiency in a RF Plasma

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