A Zero Dimensional Time-Dependent Model of High-Pressure Ablative Capillary Discharge

Abstract

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A Zero Dimensional Model of High-Pressure Ablative Capillary Discharge With Capillary Wall Thermal Conduction and Radiation Absorption

“…In it, the authors introduced their concept of the pulsed electrothermal thruster; this group later built and tested such devices 2,3 . Since then many theoretical papers have been published exploring the applications of such discharges to electrothermal capillary thrusters, electrothermal launchers, and electrothermal chemical guns; a review of these papers with the corresponding references can be found in a recent theoretical paper 4 . It should be noted that in this paper 4 the author for the first time used a radiation heat-transfer model based on a radiation database.…”

“…Since then many theoretical papers have been published exploring the applications of such discharges to electrothermal capillary thrusters, electrothermal launchers, and electrothermal chemical guns; a review of these papers with the corresponding references can be found in a recent theoretical paper 4 . It should be noted that in this paper 4 the author for the first time used a radiation heat-transfer model based on a radiation database. This database was constructed using PrismSPECT, a commercially available radiation software 5 that calculates the radiation spectrum output from a uniform plasma slab.…”

“…All ten of these assumptions have been analyzed in detail in 4 and will not be discussed in this paper.…”

“…Unlike in 4 , where the heat losses into the capillary wall were neglected, in this paper we take them into account. We assume that the capillary wall radiation absorption coefficient, , is a constant, independent of wavelength and wall temperature.…”

Transient Shock Formation of Pulsed Electrothermal Plasma Discharge Confined in an Extended Bore

“…They were originally developed to improve the ignition delay and the combustion rate of the solid propellants for the acceleration of the projectile by high temperature, high-pressure, and high-velocity plasma jet as an alternative to the conventional chemical igniters 1)-4) and it was recently investigated to be a possible candidate for electrothermal thruster in a satellite propulsion system. 5) Other applications of the electrothermal gun in recent years are the production of novel materials such as ceramic and metal nanopowders or the thermal plasma spray coatings. Peterson 6) explored the potential of the electrothermal gun as the efficient source of the thermal plasma spray of metal plasma vapor, and later Kim 7) was able to produce a wide variety of nanocrystalline metallic and ceramic powder materials using the pulsed plasma jet discharged into the controlled background gas in the reaction chamber.…”