The proposal is a multiple water propulsion system which combines a water resistojet and water ion thruster

Asakawa, Jun

Koizumi, Hiroyuki

Nakagawa, Yuichi

Yaginuma, Kazuya

English

DigitalCommons@USU

Multiple Water Propulsion Systems: All Propulsive Capabilities for CubeSats from LEO to Deep Space Jun Asakawa, Kazuya Yaginuma, Yuichi Nakagawa, Hiroyuki KoizumiContact information: asakawa@pale-blue.co.jp / nakagawa@pale-blue.co.jpWhat is Pale Blue Inc.?• Start-up company from University of Tokyo• Established in April 2020• Focusing on • Propulsion system for nano-/micro- satellite• Propulsion system using water as a propellantProposal: Multiple Water Propulsion System• Combine water resistojet and water ion thruster• Resistojet: High thrust and reaction control• Ion thruster: High specific impulse and large delta-VWater resistojet thruster• 1U module / 5-20 W• 5 Nozzles• Thrust: 200 mN/kW• Specific impulse: 70 s• 400 g water propellant• Launched in 2019 / TRL 7-8Water ion thruster• 1U+ module / 30 W• Ion source & Neutralizer• Thrust: 140 µN• Specific impulse: 500 s• 300 g water propellant• TRL: 6-7Water propellantLow-cost / short-term development  ISRU: In-Situ Resource UtilizationReducing cost on safety requirementScalable total impulseSafety / No toxicLiquid in 1 atmEasy to handleLow costConclusion / Future works• Multiple Water Propulsion System is proposed• Resistojet thruster passed all tests and was launched• Ion thruster was developed and is being improved • Integrated model is designed and under constructionDesigned* Future targetThrust 310 µN 180 / 550 µNSpecific Impulse 970 s 940 / 2000 sPower 60 W 25/ 60 WSize 1U+ 1U+Propellant 350 g 350 gTotal Impulse 3.3 kNs 3.2 / 6.8 kNs* Based on experimental data of componentsImprovement on ion thruster collaborating with U TokyoApplied to the systemDesigned based on the same concept0123456780 100 200 300Measured Thrust /mN by using Thrust StandTime /sVaporization Chamber Pressure /kPa Safety requirement for ISS Vibration / radiation test Reproducibility© University of TokyoSSC20-P4-08

Multiple Water Propulsion Systems: All Propulsive Capabilities for CubeSats From LEO to Deep Space

https://digitalcommons.usu.edu/cgi/viewcontent.cgi?article=4859&amp;context=smallsat

Multiple Water Propulsion Systems: All Propulsive Capabilities for CubeSats From LEO to Deep Space

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