Modelling of Cryopumps for Space Electric Propulsion Usage
Abstract
:1. Introduction
2. DLR Electric Propulsion Test Facility Göttingen
3. Cryopump Basics
4. DLR STG-ET Pumping System
- Pumps 1–6: 6 round plates of 0.5 m diameter
- Pumps 8–10: 3 square plates of 0.5 m × 0.5 m (pumps in place since chamber built)
- Pumps 7, 11–18: 9 round plates of 0.6 m diameter
5. Pumping Speed Measurement
Pumping Speed Measurement for Xenon, Krypton, and Argon
6. Cryopump Operation Analysis
7. Cryopump Modelling
7.1. Cryopump Head Cooling Capacity
7.2. Cold Plate Material Properties
7.3. Water Ice Properties
7.4. Ice Absorptance Profile Similarity Analysis
7.5. Xenon Ice Properties
7.6. Model for Operation Simulation
8. Comparison of Data and Model
8.1. Data Set
8.2. Modelling Operation
8.3. Modelling Warm-Up
8.4. Modelling the Impact of Water on Warm-Up Behaviour
8.5. MLI Size Recommendations
9. Conclusions and Outlook
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
Nomenclature
EP | Electric Propulsion |
LN2 | Liquid Nitrogen |
MLI | Multi-layer Insulation |
RIT | Radiofrequency Ion Thruster |
sccm | standard cubic centimeters per second |
STG-ET | Simulationsanlage Treibstahlen Göttingen—Elektrische Triebwerke |
(High Vacuum Plume Test Facility Göttingen—Electric Thrusters) | |
THR | Thruster |
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Temperature Range (K) | |
---|---|
4.2–30 | |
30–50 | |
50–70 | |
70–100 | |
100–200 | |
200–298 | |
298–1358 |
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Neumann, A.; Brchnelova, M. Modelling of Cryopumps for Space Electric Propulsion Usage. Aerospace 2024, 11, 177. https://doi.org/10.3390/aerospace11030177
Neumann A, Brchnelova M. Modelling of Cryopumps for Space Electric Propulsion Usage. Aerospace. 2024; 11(3):177. https://doi.org/10.3390/aerospace11030177
Chicago/Turabian StyleNeumann, Andreas, and Michaela Brchnelova. 2024. "Modelling of Cryopumps for Space Electric Propulsion Usage" Aerospace 11, no. 3: 177. https://doi.org/10.3390/aerospace11030177