Study of an electrospray-based electric propulsion system for small satellites
Bibliographic record
Abstract
Electric propulsion is highly efficient for both deep-space and near-earth applications and it is an excellent candidate for small satellites due to its inherent small size and high specific impulse. A colloid electrostatic thruster for small spacecrafts is investigated in the present work. The study aims to gain an increased understanding of complex underlying physical processes. A simulation approach was previously used to investigate the beam trajectories and have helped to design a laboratory model of the electrospray-based micro-thruster which has been characterized experimentally <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">1</sup> . Interestingly, simulations can offer insights into the flows within the electrospray and offer critical local information difficult to measure experimentally due to the small scales. Thus, an electrohydrodynamic modeling of the transition of a charged liquid interface into a cone is described via a coupled formalism. The governing factors are accessed in order to precisely predict the initiation of the electrospray as well as capture the cone-jet mode of a focused beam of droplets or ions. Furthermore, in order to build a matrix of multiple emitters for use in a nano-satellite, the phenomena governing the transition in the electrospray has to be clearly understood. The competing processes in the cone-jet mode essential for optimization of a large-scale micro-thruster are fully discussed and compared. Moreover, interesting mixed modes comprising charged droplets as well as ions are explored in order to increase thrust or specific impulse.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".